Displaying items by tag: mathematics
Monday, 01 November 2021 08:29
Mathematics Questions and Answers - Class 6 End of Term 2 2021 Exams Set 2 with Marking Schemes
QUESTIONS
- Write eight million eight hundred and eighty, eight thousand eight hundred and eighty eight.
- 8,888,808
- 8,880,888
- 8,888,880
- 8,888,888
- What is the place value of digit 6 in the number 7318.106
- Thousandths.
- Ones.
- Thousand.
- Hundredths.
- Find the sum of 10 and √100
- 200
- 1000
- 110
- 150
- Round off 978432 to the nearest thousand
- 979000
- 978400
- 979432
- 978000
- Which one of the following numbers is divisible by 8?
- 11236
- 5218
- 69960
- 41326
- What is the difference between the LCM and GCD of 12, 18 and 24?
- 24
- 6
- 18
- 66
- Subtract: 121/2 from 161/3
- 35/6
- 45/6
- 22/6
- 35/8
- In a class of 60 pupils, 900 exercise books were given to be shared equally. How many books did each child receive?
- 54000
- 15
- 150
- 960
- Find the missing numbers in the magic square.
- a=11, b=8
- a=9,-10
- a=8, b=11
- a=12, b=7
- What is the area of the shaded part in the figure below?
- 126m2
- 52m2
- 178m2
- 74m2
- What is the value of z in
6Z - 3 + 2z =29- 4
- 8
- 31/4
- 32
- What is the circumference of the figure below?
- 66m
- 132m
- 1272m
- 1386m
- Which statement is true?
- 1.33 > 13.3
- 3/4>0.75
- 1m < 100cm
- 2 weeks > 48hours
- Express 1.24 as a percentage
- 124%
- 0.124%
- 1.24%
- 12.4%
- The area of a square field is 256m2. Find its perimeter.
- 16m
- 64m
- 1024m
- 512m
- What is the value of 1242/3 +51/2
- 210/33
- 661/3
- 181/6
- 71/6
- The scale of a drawing is 1cm represents 10m. Find the actual lengths represented by 12cm
- 1200m
- 12000m
- 12m
- 120m
- Convert 0.16 into fraction in its simplest form.
- 16/100
- 4/25
- 8/50
- 16/1000
- Calculate the measure of angle marked a?
- 102°
- 90°
- 112°
- 92° 20.
- Work out:
0.032 ÷ 0.8- 0.4
- 4
- 0.04
- 0.004 21.
- Simplify:
2(5y + 7x) + 3(27-4x)- 16y - 2x
- 7y + 3x
- 7y-3x
- 16y + 2x
- Nyanguta bought the following items from a shop
21/2 kg of rice for sh. 320.00
3 loaves of bread @sh. 50.00
2 packets of milk @sh. 55.00
If she paid using sh. two-sh. 500 note. How much balance did he get?- Sh. 420
- Sh. 580
- sh. 20
- Sh. 422
- Onyango left home for school at 7.05 a.m. She took 50 minutes to reach school. At what time did she reach school?
- 7.50 a.m
- 8.55 a.m
- 7.55 a.m
- 7.55 p.m
- Find the reciprocal of 10
- 1/10
- 100
- 5
- 10/1
- What is the compliment of 20
- 92°
- 88°
- 178°
- 188°
- Arrange the following fraction in descending order.
3/5, 2/3, 1/2, 3/4- 1/2,2/5,2/3,3/4
- 3/4,2/3,3/5,1/2
- 3/4,2/3,3/5,1/2
- 3/4,3/5,2/3,1/2
- What is the next number in the sequence.
144, 169, 196, ................- 225
- 256
- 325
- 221
- Find the value of x in the following
1/5x - 3 = 9- 60
- 12
- 30
- 20
- Find the sum of prime numbers between 30 and 40
- 68
- 31
- 140
- 107
- What do you get when you divide the square of 12 by the square root of 64?
- 18
- 21/4
- 51/3
- 76
- The area of a triangular plot is 300m2. If the base is 40m, what is the height?
- 20
- 15
- 40
- 7.5
- Find the size of angle x
- 50°
- 100°
- 180°
- 110°
- Jane's average score in five tests was 55 marks. She scored 45 marks in the first four subjects. How many marks did she score the fifth test?
- 85
- 95
- 40
- 110
- What is (21/3)2
- 21/3
- 51/3
- 41/6
- 54/9
- Subtract 6578596 from 9500624
- 2922028
- 3922028
- 2932128
- 2932028
- What is the quotient of 29512 and 68
- 4034
- 4304
- 434
- 4340
- Add:
0.23 + 4.021 + 116.3- 120.551
- 119.551
- 121.651
- 120.651
- What is the volume of the cuboid below.
- 24m3
- 48m3
- 6m3
- 13m3
- What is the area of triangle below.
- 48m2
- 36m2
- 72m2
- 64m2
- What is the value of
- 22/3
- 52/6
- 31/3
- 21/3
- Otieno earns sh. 9000 per month. If he spends 65% of this and saves the rest, how much money does he save?
- Sh. 3150
- Sh.9035
- Sh. 9065
- Sh. 250
- Work out. 9.003 x 10
- 900.3
- 90.03
- 9003 .
- 0.9003
- Talia has a rectangular piece of land measuring 724m long by 230m wide. What was the perimeter of her land in metres.
- 1908
- 964
- 494
- 988
- How many packets can be obtained from 24kg of sugar.
- 6
- 96
- 28
- 24%
- Which of the given fractions is equivalent to 3/5?
- 9/15
- 4/10
- 12/15
- 9/10
- By using the digits 8, 6, 5,4,9 make the largest number possible.
- 96548
- 45689
- 89654
- 98654
Use the graph below to answer questions 47-49 The graph shows farmers sales of milk in a week.
- In which day did she sell the highest number of litres?
- Friday.
- Tuesday.
- Monday.
- Thursday.
- What was the sum of the sales on Tuesday and Wednesday?
- 55
- 15
- 70
- 65
- What was his sales for the whole week?
- 250
- 190
- 200
- 180
- What is the next shape in the pattern?
Marking Scheme
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Monday, 01 November 2021 07:52
Mathematics Questions and Answers - Class 6 End of Term 2 Exams Set 1
MATHEMATICS
STD 6
END TERM 2
- Write 6047503 in words
- Six hundred and four million seven thousand five hundred and three
- Six million four hundred and seventy five thousand and three
- Six million forty seven thousand five thousand and three
- Sixty million forty seven thousands five hundred and three
- What is the place value of digit 7 in the number 7896534
- ten thousands
- thousands
- millions
- hundred thousands
- What is the total value of digit 6 in 47.3256
- 0.0006
- 6
- 0.006
- 0.6
- What is of 30
- 150
- 5
- 305/6
- 25
- What is the next number in the series below 100, 81, 64,
- 4
- 49
- 56
- 36
- Work out
3 4/5 X 1 6/3- 2 4/5
- 20 2/15
- 20 4/5
- 15 4/15
- Solve the equation
6x + 3 = 15- 2
- 3.
- 4
- 18
- What is the measure of angle y in the diagram below
- 10
- 80
- 160
- 20
- Kerubo had 30kg of sugar. She put the into packets weighing / kg each. How packets did she fill
- 40
- 22,
- 23
- 90
- Round off 5.3827 to one decimal place
- 5.30
- 5.38
- 5.4
- 6.4
- Work out
8.75 ÷ 0.25=- 0.035
- 0.035
- 35
- 3.5
- Find the area of the triangle below
- 20cm2
- 30cm2
- 40cm2
- 48cm2
- What is the least number that can be divided by 12,18 and 24 without a reminder
- 66
- 72
- 78
- 6
- In Gucho primary 70% of the pupils are girls. If 270 pupils are boys, how many pupils are there is that school
- 18
- 81
- 900
- 630
- The volume of a cuboid is 576cm3. What is its height if the length is 12cm and the width is 8cm
- 60cm
- 1.6cm
- 16cm
- 6cm
- What is the mass of three packets containing 24 1/3kg, 10 1/2kg and 15 1/4 kg of rice
- 50 1/2
- 49 1/12
- 34 5/6
- 1 1/12kg
- Work out the square of 25
- 225
- 625
- 50
- 5
- The area of a square room is 900m2.What is its perimeter?
- 930
- 60m
- 120m
- 30m
- Simplify
5(3x - 2y) + 3(2x + 4y)- 10x - 22y
- 21x-2y
- 10x + 22y
- 21x + 2y
- Use the symbols =, <or > to complete the statement below
600___500 + 102_ √4- none
- >
- <
- =
- Express 2000cm2 in m2
- 0.02m2
- 200m2
- 2m2
- 0.2m2
- Karonjo's peace of land is in the shape of a square whose side measures 2 1/4m what is its perimeter
- 4m
- 81m
- 9m
- 81/16cm
- Express 0.84 as percentage
- 84
- 8.4
- 84%
- 84/100
- 60% of a number is 360 what is 90% of the same number
- 540
- 1000
- 180
- 216
- Add 869 + 7 +94684 and give your answer to the nearest thousands
- 96000
- 95000
- 96560
- 95560
- The diagram below represents an equilateral triangle what is the measure of angle W
- 90
- 120
- 30
- 60
- What is the value of
km m cm
6 280 35
x 8
_____________- 50km 242m 280cm
- 48km 242m 80cm
- 50km 242m 80cm
- 50km 224m 80cm
- Which one of the following geometric instruments can be used to measure an angle
- protractor
- ruler
- set square
- pair of compass
- Korir bought the following items from a shop
2kg of sugar @sh 100
2 loaves of bread @sh 50
1kg of salt @sh 30
5kg of rice @sh 100 per kg
What balance did he get. If he paid with sh 1000 note- Sh 720
- Sh 170
- Sh 830
- Sh 1830
- In class six there are 30 pupils. Each pupil was given a 2dl packet of milk. How many litres of milk was this
- 120L
- 60L
- 6L
- 30L
- Mumo earns Kshs 1200 per a day. If he saves 20% of this, how much money does he spend
- Sh 960
- Sh 1440
- Sh 240
- Sh 1200
- Mwangi left Mombasa at 2340hrs. It took him 1hr 20 minutes to arrive at Sultan Hamud. At what time did he arrive at Sultan Hamud?
- 1.00p.m
- 2420hrs
- 2500hrs
- 0100hr
- Name the point of intersection in the figure below
- F and E
- A and C
- H and E
- F and C
- The area of the rectangle below is 180cm? Find its perimeter
- 27cm
- 12cm
- 165cm
- 54cm
- What is the complimentary angle of 72°
- 180°
- 18°
- 108°
- 90°
- A wheel has a radius of 21 cm makes 100 revolutions. What distance did it cover in metres
- 132m
- 1320m
- 13.2m
- 13200m
- Ombuga travelled from Nairobi to Busina distance of 480km in 6 hours. What was his average speed in km/h
- 80km/h .
- 486km/h
- 2880km/h
- 474km/h
- What is the sum of the vertices, faces and edges of a open cuboid
- 26
- 25
- 20
- 21
- What is the area of the unshaded part in the figure below
- 90cm2
- 6m2
- 84cm2
- 96cm2
- Otara bought a cow at sh 77500 and solit to Ombui at sh 85,000 what profit did he make
- Sh 8500
- Sh 7500
- Sh 85000
- Sh 162500
- Okongo bought a goat for sh 1200 and sold it at sh 1400. Calculate his percentage profit
- 11%
- 13 1/2%
- 14 2/7%
- 16 2/3%
- Arrange the following in ascending order
3/8 , 1/6, 3/4, 2/3- 3/4 ,3/8 ,2/3 ,1/6
- 1/6,3/4 ,2/3 ,3/8
- 3/4,2/3 , 3/8 ,1/6
- 3/4,2/3 , 3/8 ,1/6
- Solve the equation for y
1/3 y=27- 9
- 27
- 81
- 3
- Complete the magic square below and find the value of x and y respectively
1 10 3 8 x 5 6 4 6 y 8 5 4
x, y- 7, 3
- 3,6
- 6,1
- 1,7
- What is
7 5/13 ÷ 3 9/13=- .9
- .5
- 1/2
- 2
- A book weighs 250g, Musa loaded 173 parcels each containing 40 such books into his lorry. Find the mass in kilograms of the books loaded at the lorry
- 1730kg
- 9.2kg
- 1730000kg
- 173kg
- How many litres are there in 24 litres
- 12L
- 96L
- 48L
- 6L
- Work out
Litres decilitres
5 6
+ 1 7
______________- 7L 3dl
- 6L 3dl
- 6L 13dl
- 7L 3dl
- Work out
0.036 + 0.002- 81
- 18
- 36
- 2
- The bar graph below shows the amount of rainfall recorded at a weather station in the first six months of a certain year.
What was the difference between rainfall in may and February?- 40mm
- 120mm
- 65mm
- 50mm
MARKING SCHEME
- C
- C
- A
- D
- B
- C
- A
- D
- A
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- C
- A
- B
- C
- D
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- B
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- B
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- B
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- D
- A
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- A
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Monday, 01 November 2021 07:37
Mathematics Questions and Answers - Class 7 End Term 2 Exam 2021 Set 2
- Which one of the following is seven hundred and three million forty thousand and twenty two in symbols?
- 703040022
- 734022
- 7304022
- 70034022
- What is the total value of digit 5 in 649.851?
- 5/10
- 85/100
- 50/100
- 5/100
- Find out the largest possible number that can be added to 6924 to make it divisible by 10
- 6
- 4
- 76
- 24
- Find the square of
25/64- 5/8
- 625/128
- 625/4096
- 50/128
- What is 72.948 rounded off to the nearest hundredths?
- 70.00
- 72.95
- 72.40
- 72.94
- Glen Walter had 150 oranges. If he gave out 20% to his friends and sold the rest at ksh.20 each. How much money did he get?
- 3600
- 1200
- 2400
- 600
- Work out the value of
2b(d+2a)
c(2a − d)
ifa=6, b=½a, c= 3a and d=1/9c- 7/30
- 7
- 7/15
- 15
- Part of a river whose actual length is 12km is represented on a map by 6cm. What is the scale used? A.
- 1:200 000
- 1:6000
- 1:120000
- 1:2000
- James deposited ksh. 50,000 in Equity bank account for 3 years at an interest of 10% p.a. How much money was in his account after this period?
- 15,000 .
- 35,000
- 85,000
- 65,000
- Velma Margeret bought a dairy cow at ksh. 60,000 during dry spell. After feeding it well for two months, she sold it at a profit of 15%. How much was her profit?
- Ksh. 69000
- Ksh. 9000
- Ksh. 45000
- Ksh. 19000
- Find the area of the figure below in ares.
- 12.32 Ares
- 1232 Ares
- 6.16 Ares
- 616Ares
- The marked price of a sofa set is ksh. 20,000. Cynthia bought the sofa set on hire purchase terms by paying a deposit of ksh. 20,000 and monthly instalment of ksh. 1000 for 12 months. How much more did she pay than the marked price?
- Sh. 32,000
- Sh. 7,000
- Sh. 15000
- Sh. 12000
- Which one of the following is not true about quadrilaterals?
- Have four sides.
- All sides are equal.
- Interior angles add upto 360°
- Have four interior angles.
- What is 1.3 × 2.4 ÷ 0.12
- 26
- 13
- 2.6
- 1.3
- Find the area of a trapezium below in hectares.
- 0.032ha
- 320ha
- 0.054ha
- 540ha
- Find the value of angle marked y in the diagram below.
- 20°
- 40°
- 30°
- 60°
- Find the area of the unshaded part in the figure below.
- 496cm2
- 80cm2
- 104cm2
- 600cm2
- What is the volume of the prism below in dl?
- 3080dl
- 616dl
- 30.8dl
- 61.6dl
- What is half the value of the second next number in the sequence.
220, 210, 190, 160, _______- 70
- 120
- 60
- 35
- Moses bought the following items from a supermarket?
3%kg of sugar at sh. 100, 2 loaves of bread @sh. 100, 500g of margarine sh. 170, a packet of tea leaves @sh.60 and 3 packets of milk for sh. 150
How much did he pay for all the items?- Sh.1230 .
- Sh.930
- Sh. 780
- .Sh. 880
- Work out:, 1/9 of (6 ÷ 2/3)
- 6
- 3
- 1
- 4
- Construct triangle ABC in which line BC=5cm,angle ABC=70° and line AC=8cm. Draw a circle whose circumference touches the vertices of the triangle. What is the diameter of the circle?
- 4.2cm
- 8.4cm
- 3.8cm
- 7.6cm
- Two bells in a School rings at an interval of 30min and 35min respectively. If they rung together at 8.20 a.m. When will they ring again together?
- 11.50 a.m
- 11.30 a.m
- 11.00 a.m
- 9.30 a.m
- A sales lady receives 20% commission on the sales made. If she sold 10 bags of maize at ksh. 3500 each. How much was her earning that day?
- Sh. 28000
- Sh. 7000
- Sh. 35000
- Sh. 1850
- What is sh. 600 reduced by 15%
- Sh. 90
- Sh. 510
- Sh. 615
- Sh. 690
- A vehicle covered a distance of 60km in 40 minutes. Find its speed in m/s
- 1.25m/h
- 8m/s
- 25m/s
- 10m/s
- 10 girls can clean a hall in 6 minutes. How many more girls are needed for the work to last for 2 minutes?
- 15
- 30
- 20
- 10
- The price of an electric cooker is shs. 3600 after a discount of 10% is given. What is the price of the cooker before discount?
- 5000
- 3240
- 4000
- 27000
- Awino is three times older than Wanjala and 5 years younger than Lenturi. find the sum of their ages if Wanjala is x years old.
- 6x + 10
- 7x − 5
- 7x + 5
- 6x − 5
- Pie chart below shows the number of animals in game park, if there are 550 zebras in the game park. How many lions are in the game park?
- 300
- 900
- 600
- 1800
- Find the surface area of a pipe whose diameter is 7cm and the length is 2m?
- 4400cm
- 8800cm
- 1400cm
- 17600cm
- The ratio of boys to girls in is 2:3. If there are 240 girls, how many boys are in the school?
- 400
- 200
- 160
- 360
- Which sets of measurements below cannot be used to make a right angled triangle?
- 6,8,10
- 3,4,5
- 15, 20, 25
- 5,7, 10
- A bus left a station at 6.30 a.m. If the bus got a puncture at town B and reached town C at a quarter past noon. How long was the journey? \
- 6hrs 15mins
- 5hrs 15mins
- 5hrs 45mins
- 6hrs 45mins
- Find the perimeter of the figure below.
- 124cm
- 112cm
- 64cm
- 88cm
- Arrange the fractions below in descending order.
4/9, 6/7, 1/5, ½- 6/7, ½, 4/9, 1/5
- 4/9, 6/7, 1/5, ½
- 6/7,4/9, ½ , 1/5
- 1/5, ½, 6/7, 4/9
- Construct a square of sides 6cm. Draw the diagonal of the square. What is half the length of the diagonal.
- 10cm
- 2.5cm
- 3.6cm
- 4.2cm
- The graph below shows production of maize in farm for 5 years.Find the reduction in maize production in kg in the farm between 2018 and 2013.
- 30000kg
- 20kg
- 20000kg
- 30kg
- The number of boys in a class is a half the number of girls. If there are x girls in the class. How many boys are in a class if the class has a total of 60 pupils?
- 60
- 40
- 20
- 120
- What is the area of the figure below if its perimeter is 20m?
- 400m2
- 40m2
- 25m2
- 100m2
- Which one of the following digits should be increased to have the largest value in the fraction.
- 6
- 7
- 9
- 1
- Which one of the following nets can be used to form an open cube?
- Calculate the area of the perpendicular below.
- 300cm2
- 120cm2
- 160cm2
- 150cm2
- What is the sum of the compliment of 60° and supplement of 70°?
- 90°
- 50°
- 140°
- 130°
- Find the modal number in
6, 3, 6, 7, 8, 6, 5, 6- 7
- 3
- 6
- 8
- Below is a graph showing a train journey from Kisumu to Busia. What was its average speed for the whole journey.
- 32.25 km/h
- 37km/h
- 65.5km/h
- 62.5km/h
- Find the value of the largest angle in the diagram below.
- 50°
- 90°
- 120°
- 30°
- A family uses 3- 500ml packets of milk in a day. How many litres does the family uses in a month of February in 2018?
- 43 litres.
- 42 litres
- 48 litres.
- 43.5litres
- Work out 600 kg as a percentage of 1 tonne?
- 30%
- 10%
- 60%
- 40%
- The figure below was drawn to a scale of 1:10000. Find its actual area?
- 360000m2
- 120000m2
- 240000m2
- 480000m2
MARKING SCHEME
- A
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- A
- C
- B
- C
- C
- A
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Tagged under
Friday, 29 October 2021 08:38
Mathematics Questions and Answers - Class 7 End of Term 2 2021 Set 1 with Marking Schemes
QUESTIONS
- Which of the following is ninety two thousand seven hundred fifty seven and fourteen thousandths
- 92757.14
- 92757.014
- 9275714
- 927571400
- What is the value of digit 6 in 7610315
- hundred thousands
- six hundred thousand
- millions
- tens of thousands
- What must be multiplied by 0.07 to get 7
- 100
- 10
- 0.1
- 0.01
- What is the sum of the next two missing numbers 1,3,6,10,15
- 21
- 28
- 49
- 7
- What is the value of
3/5 + 1/3 of (4/7 - 1/5) ÷ 2/3- 23/10
- 11/14
- 51/5
- 13/10
- If a=3, b=a-1 and c = b +4
Evaluate
a2 + c
2b - 1- 5
- 3
- 7
- 1
- Jared deposited sh 24000 in a bank which pays 15% simple interest. He withdrew all the interest after 11/2 years. How much money did he withdrew
- Sh 4040
- Sh 3600
- Sh 5400
- Sh 2940
- James fenced his rectangular piece of land measuring 50m by 25m. Using five strands of wire what length of wire did he use
- 750m
- 600m
- 375m
- 150m
- What is the next number in the sequence below
1/2, 5/8, 3/4, 7/8- 2
- 11/8
- 11/7
- 1
- What is the value of 8.229 + 4 correct to the nearest thousandths
- 2.058
- 2.0573
- 2.573
- 2.057
- Mwangi drives 21/2hrs at an average speed of 64km/h and later drives 50km at 100km/h. What is his average speed for the whole journey
- 50km/h
- 70km/h
- 3km/h
- 210km/h
- Mkulima bought a radio cassette on hire purchase terms. He paid a deposit of sh 5000 and there after 15 monthly installments of Sh 1200 each. If the total amount he paid was Sh 3000 more than the marked price, what was the marked price of the radio cassette
- Sh 23000
- Sh 13000
- Sh 26000
- Sh 20000
- Find the perimeter of the shape below in metres
- 460mm
- 300cm
- 4.6m
- 52m
- Elijah scored an average mark of 63% in six tests in the first five, his score was 67%. 58%, 72%, 53% and 60%. What was his score in the sixth test?
- 378
- 69
- 68
- 75.6
- Nyambura bought the following items from a shop
2kg of flour for sh 150
3kg of rice @sh 70
2 bars of soap @sh 110
2kg of cooking fat @sh 100
2 boxes of matches for sh 10
If she gave the shopkeeper sh 1000 note, how much balance did she receive- Sh 50
- Sh 210
- Sh 950
- Sh 790
- What is the sum of the next two prime numbers after 83
- 172
- 186
- 170
- 176
- In the figure below angle BAC is 52° and angle ACB is 48°. Find the measure of angle t
- 100°
- 80°
- 48°
- 52°
- Which of the following measurements will form a right angled triangle
- 7cm, 8cm, 10cm
- 2.5cm, 6cm, 6.5cm
- 4cm, 6cm, 10cm
- 5cm, 6cm, 7cm
- An orange tree was 160cm. The height of the tree increased by 71/2 find the new height of the orange tree
- 2671/2 cm
- 1071/2cm
- 172cm
- 167cm
- Five men working at the same rate can dig a shamba in 12 days. How many days will 15 men take
- 4 days
- 60 days
- 27 days
- 17 days
- 5(7 - 3e) + 3 (9e + 2)
- 12e +41
- 12e-41
- 42e-2a
- 42e = 2a
- Find the perimeter of the given figure below
(take pie to be π =31/7 )- 108m
- 90m
- 80m
- 108m2
- King'ong'o and Muriasi shared sh 750 in the ratio of 7:8 respectively how much Muriasi get
- Sh 500
- Sh 400
- Sh 250
- Sh 350
- The price of a radio was reduced by 20% in a reduction sale. If maina bought it at Sh 5600, what was the original price of the radio
- Sh 1400
- Sh 7000
- Sh 6000
- Sh 8000
- The mean weight of 8 chicken is 31/2kg. The total weight of three of the chicken is 13kg what is the mean weight of the remaining five chicken in grammes
- 3000
- 8
- 28
- 3
- The area of a triangle is 96cm2. If its base is 12cm what is the height of the triangle
- 16cm
- 32cm
- 24cm
- 12cm
- What is the value of
0.48 x 0.24
0.24 x 0.06- 8
- 800
- 0.8
- 80
- The table below shows the number of goats sold in a week
Day Mon Tue Wed Thur Fri No Sold 43 40 39 46 42 - 41
- 43
- 42
- 39
- The charges for sending a telegram are sh 12 for ten words or less. Sh 1.00 is paid for each extra work. A tax of 18% of the total is then charged. How much did Sophia pay to the nearest five cents for the telegram below
JOSHUA BOX 18 KANGUNDO SEND SCHOOL FEES SHILLINGS TWELVE THOUSANDS JOSHUA- Sh 15.34
- Sh 15.30
- Sh 15.50
- Sh 15.35 30.
- A pick up carried 14 cartons. Each carton had 200 tins. What is the total mass of the tins in tonnes if each tin was 500g
- 14
- 14000
- 1.4
- 1400
- The ration of sheep to cows in a flock is 5:3. If there are 130 less cows than sheep. How many cows are in the flock
- 390
- 520
- 325
- 195
- On a map the scale used is 1:5000. A piece of land is drepresented on a drawing by a length of 3cm by 2cm. Find the actual area of the land in hectares
- 6ha
- 1.5ha
- 300ha
- 0.3ha
- Find the size of the angle marked L
- 114°
- 66°
- 132°
- 48°
- Tap A takes 6 hours to fill a tank while tap B takes 8 hours to fill the same tank. What fraction of the tank is filled by both taps in 1 hour
- 1/24
- 7/24
- 1/8
- 1/6
- Which is the shortest length of wire from which equal pieces of length 32cm, 28cm and 36cm can be obtained without a remainder
- 4cm
- 96cm
- 2016cm
- 120cm
- Work out
(0.9)2 + √0.0196- 0.95
- 0.14
- 0.81
- 0.95
- Arrange the following ascending order
2/3, 0,42, 5/8 and 0.44- 0,42,2/3, 0.44, 5/8
- 0,42,0.44,5/8,2/3
- 2/3,5/8,0,42,0.44
- 0,42,2/3,0.44,5/8
- Calculate the area of the closed cylinder shown below
π = 22
7- 1034cm2
- 880cm2
- 1188cm2
- 308cm2
- The table below gives the distance in kilometres between town F to K
What is the distance between town F and K via G- 150
- 320
- 240
- 390
- What is the value of
(3y + 4b) - (2y + b)
If b=6 and y=10- 28
- 80
- 40
- 54
- Karanja bought 5.86kg of potatoes, Kamau bought half what Karanja bought and Omondi bought 3 times what Kamau bought. What was the total mass of the potatoes bought by the three people
- 8.79
- 14.65
- 11.79
- 17.58 42.
- What is twice the value of w in the figure below
- 40
- 80
- 50
- 36
- Three hundred and sixty four people contributed Sh 450 each to buy a piece of land. How much did they contribute all ! together
- Sh 814
- Sh 136800
- Sh 163800
- Sh 16380
- What is the distance of the given figure below in metres
- 10.665m
- 10665m
- 1066.5m
- 106.65m
- Wendy is p years old. Her father is 7 times as old as wendy. How old will her father be in 30 years time?
- 7p + 30
- 8p + 60
- 2p + 30
- p + 30
- A rectangular tank measures 3.2m by 12m by 4.5m high. Find the volume of the tank in cubic metres
- 172.8m3
- 172800m3
- 1.728m3
- 1728m3
- Mwango visited her aunt on January 20th 2016. He went back home on 3rd March 2016. How many nights did she sleep at her aunt's place
- 91
- 44
- 43
- 42
- Solve the inequality below
2x - 2 > x+3
2 4- x>12/5
- x>21/3
- x<1 2/5
- x<21/3
- Construct triangle PQR in which QP-6cm, PR-4.5cm and angle PRO is 1200. Draw a circle that passes point PQR. What is the diameter of the circle?
- 6.8cm
- 10.6cm
- 3.4cm
- 5.3cm
- The graph below shows Nyangweso's journey from Nyeri to Migori by car. He started his journey at 8.00a.m and arrived ar 3.30 p.m
What was his average speed after lunch- 50km/h
- 150km/h
- 66 km/h
- 557 km/h
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Tagged under
Friday, 29 October 2021 06:53
Mathematics Questions And Answers - Class 8 End of Term 2 2021 Set 2
MATHEMATICS
STD 8
END OF TERM 2
- Which one of the following is eleven million four hundred thousand six hundred and eleven in symbols?
- 11400161
- 11040611
- 11400611
- 11004611
- What is the place value of digit 5 in the number 645732?
- 5000
- Hundreds
- Ten thousands
- Thousands
- What is the Highest Common Factor of 48, 72 and 54?
- 6
- 12
- 32
- 864
- What is 5798923 rounded off to the nearest thousands?
- 5790000
- 5799000
- 5798000
- 579800
- What is the next number in the sequence below?
1½, 2 1/6, 2 5/6, 3½, ____- 4 1/6
- 4 1/3
- 4 1/2
- 5 1/6
- What is the square root of 5 4/9?
- 1 7/9
- .2 1/3
- 2 2/3
- 7/9
- Which one of the following computations gives a fraction equivalent to 7/9?
- 5 x 2
6x3 - 7x3
3 x 9. - 9-2
11 + 2 - 7X2
18 + 2
- 5 x 2
- In the figure below, BCDE is a quadrilateral. Line ABC is a straight line. Line AC is parallel to ED and line EB is parallel to DC. Angle AEB = 80° and EDC = 125°.
Find the value of angle EAB.- 55°
- 135°
- 45°
- 80°
- What is the least number that should be added to 3661 to make it divisible by 8?
- 5
- 2
- 3
- What is the value of:
4.5+ 3.6 x 1.2 + 1.36
0.5- 20.36
- 19.32
- 19.00
- 10.18
- The price of a suit was increase by Shs.400. If this was 20%, what was the price of the suit before the increase?
- Shs. 2400
- Shs. 2000
- Shs. 1800
- Shs. 1600 12.
- 1.5 tonnes of sugar were packed in 750g packets. How many packets were obtained?
- 2
- 200
- 2000
- 20
- What is the perimeter of the figure below given that OB is the diameter of the semi circle? (π=22/7)
- 120cm
- 140cm
- 126cm
- 112cm
- The difference of two numbers is 850. The smallest number is 717. What is the other number?
- 1467
- 1667
- 1567
- 133
- Kamau is three times as old as his sister Ten years ago, their total age was 24 years How old will Kamau be in 3 years times?
- 36 years
- 11 years
- 14 years
- 33 years
- What is the value of:
ab2(c2 - 2a)
c
where a = b + 3, b = c - 2 and c = 4.- 55
- 30
- 15
- 70
- The figure below shows a triangle
What kind of a triangle is it?- Right angled triangle.
- Equilateral triangle
- Scalene triangle
- Isosceles triangle
- Alice bought 15 cartons of milk. A carton contains thirty six-500ml packets of milk. How many litres of milk did Alice buy altogether?
- 27000L
- 54000L
- 270L
- 450L
- What is the value of w in the equation.
W+1 + 3 = 6?
2- 2
- 5
- 4
- 8
- Construct triangle ABC in which AB = 6.5cm, AC = 5cm and angle ACB = 60°. What is the length of line CB?
- 5.2cm
- 4.9cm
- 5.9cm
- 6.9cm
- The area of the trapezium below is 648cm2.Line AB is 24cm and the perpendicular height is 18cm.
Find the length of line DC- 72cm
- 96cm
- 24cm
- 48cm
- Adagi bought a watch for Shs. 342 after he was allowed a discount. If the marked price was Shs. 360, what was the percentage discount?
- 5%
- 18%
- 22%
- 6 1/9%
- The temperature of ice was 14° below the melting point. It was heated to a temperature of 68°C. What was the rise in temperature?
- 54°C
- 72°C
- 68°C
- 82°C
- The length of a rectangle is 36cm. Itsdiagonal is 45cm. Calculate its perimeter?
- 126cm
- 162cm
- 81cm
- 61cm
- Three traffic signals are set to flash at intervals of 24 min, 30 min and 36 min. It they flashed together at 9:10a.m, at what time had they flashed together before?
- 3:10pm
- 9:16am
- 10:40pm
- 3:10am
- What is the area of the shaded part in the figure below?
- 20cm2
- 72cm2
- 30cm2
- 36cm2
- Kemunto bought the following items from a shop:
2kg of rice at Shs. 75.
3 packets of flour at Shs. 120.
2 1/2 kg of sugar at Shs. 50.
2 packets of coffee for Shs. 150.
She paid for the items with two-sh.500 notes. What balance did she get?- Shs. 785
- Shs. 65
- Shs. 215
- Shs. 225
- The ratio of men to women in a meeting was 4:5. There are 70 more women than men in the meeting. How many women were there?
- 350
- 630
- 280
- 400
- What is the perimeter of the figure below. The diameter of the semi-circle is 10cm (Take = 3.14)
- 32.55cm
- 30.55cm
- 23.44cm
- 29.55cm
- A book seller sold Distinction Mathematics text book for Shs. 720 making a 10% loss. How much would he have sold the book to make 20% profit?
- Shs. 880
- Shs. 800
- Shs. 960
- Shs. 864
- A circular pond has an area of 2464m2. It was fenced round using five strands of wire. What is the length of the wire used? 1=22%,
- 789m
- 280m
- 176m
- 880m
- A motorist travelled at a speed of 60km/h for 2hrs. He then increased the speed by 10km/h for other 2 hours. What was the average speed for the whole journey?
- 65km/h
- 64km/h
- 70km/h
- 68km/h
- What is the sum of the mean and the mode of the following numbers?
4, 5, 6, 7, 5, 9, 5, 8,5- 6
- .5
- 10
- 11
- Simplify:
1/2(2x - 14 - 6) + 1/4(8x + 36y + 12)- 3x + 2y - 6
- 3x + 2y + 6
- 3x + 2y
- 3x + 16y +6
- 8 workers were expected to take 24 days to complete some work. Two failed to turn up. How many more days did the work take the remaining workers to complete the work?
- 32
- 8
- 18
- 6
- The perimeter of the triangle below is 36cm.
What is the area of the triangle above?- 60cm
- 120cm
- 30cm
- 65cm
- Luka borrowed Shs. 25500 from a bank that charged simple interest at a rate of 15 % p.a. If he paid all the money after 8 months, how much did he pay?
- Shs. 25050
- Shs. 2550
- Shs. 2813
- Shs. 2635
- A length of 5cm was drawn on a map to represent a river of 80km long. What is the scale of the map?
- 1:16000000
- 1:1600000
- 1:160000
- 1:16000
- After paying a commission of 7% of the price of a vehicle to an agent, the owner of the vehicle was left with Shs. 232500. How much was paid to the agent?
- Shs. 17500
- Shs. 17275
- Shs. 16275
- Shs. 25000
- In the figure below, line MN = MT, angle NMT = 40°, angel PTN = 30° and angle PNT = 70°
What is the measure of angle MPT?- 30°
- 100°
- 80°
- 70°
- The area of a square piece of land is 0.64ha. What is its perimeter in metres?
- 80m
- 320m
- 6400m
- 8000m
- Naliaka bought 1000 bananas at Shs. 5 each. On the way, 43 bananas got spoilt. She sold the rest in piles of 11 bananas at Shs. 88 each pile. What was the profit made?
- Shs. 6656
- Shs. 1656
- Shs. 5000
- Shs. 2656
- Timothy bought a T.V set through a hire purchase terms by paying a deposit of Shs. 9500 followed by 20 monthly installments of Shs. 920 each. If the cash price was Shs. 24000, how much more than the cash price did he pay for the TV set?
- Shs. 3900
- Shs. 13580
- Shs. 15100
- Shs. 5600
- The figure below shows a right-angled triangle YXZ. Line XY = 6.5cm, MY = 2.0cm and ZM = 7.5cm. 7.5cm
What is the area of triangle MZY?- 6.5cm
- 13.5cm
- 6.0cm
- 18.5cm
- What is twice the value of:
1/2 of 3/4 + 1/8 (7/9 - 2/3) ÷ 1/4?- 31/36
- 31/72
- 1/4
- 17/18
- What is the surface area of the solid drawn below?(π=22/7)
- 50016cm
- 30800cm
- 2992cm
- 5632cm
- What is the total value of digit 3 in the number? 6835290
- 3000
- Ten thousands
- Thirty thousand
- 300000
- The table below shows distance in km between different towns. Thika 80 Kenol 113 1140 Sagana 160 120 40 Karatina What is the distance from Sagana to Thika via Kenol?
- 40km
- 160km
- 113km
- 220km
- Mr. Stephen paid Shs. 1800 for an item after he was allowed a discount of 10%. How much was the marked price?
- Shs. 2000
- Shs. 1980
- Shs. 1620
- Shs. 2180
- The graph below shows the journey of a motorist.
What was his average speed for the whole journey?- 60km/h
- 48km/h
- 72km/h
- 100km/h
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Thursday, 28 October 2021 13:29
Mathematics Questions and Answers - Class 8 End Term 2 Exam 2021 Set 1
- Which one of the following is 47665210 in words?
- Forty seven million, six sixty five thousand two hundred and ten.
- Four million seven hundred and sixty five thousand two hundred and ten.
- Forty seven million six hundred and sixty five thousand two hundred and ten.
- Forty seven million six hundred and fifty six thousand two hundred and one.
- What is the difference between the largest number and the smallest number formed by the digits 4, 5, 1, 0, 2?
- 43965
- 55455
- 52965
- 54455
- Work out twice the value of:
12− (196÷14) x 2 + 26- 10
- 20
- 44
- 22
- Round off 499.9972 to the nearest hundredths.
- 499.99
- 499.00
- 500
- 500.00
- What is the largest capacity of a bottle that can be used to completely empty three containers each holding 48L, 60L and 72L without a remainder?
- 24L
- 12L
- 720L
- 360L
- In the figure below line AB is parallel to line CD and XY is a straight line, angle CKR = 110°, line RT RY.
What is the measure of angle YTB?- 125°
- 55°
- 70°
- 110°
- 24 workers can take 30 days to complete the construction of a bridge. How many more days will it take to complete the work if 4 workers failed to turn up?
- 36
- 32
- 2
- 6
- A man deposited sh 60000 in a bank. After 2½ years he withdrew a total of 68250. At what rate per annum was the money earning the interest?
- 5½%
- 5%
- 11.4%
- 7½%
- Njuguna and Mercy shared the profit of sh 20000 in the ration 3:1. How much did Njuguna get?
- Sh 5000
- Sh 10000
- Sh 15000
- Sh 12000
- A grazing farm in a rectangular shape was drawn using a scale of 1:50000. Calculate the distance round the rectangular farm as accurately drawn below.
- 13m
- 26m
- 1300000m
- 13km
- Electric poles were erected to connect electricity between two towns 3.75km apart. If the poles were placed 50m apart, how many poles were used?
- 75
- 76
- 3700
- 38
- What is the value of
½ of 4½ ÷ 22/3 x 7/9 − 2/5?- 7/20
- 8/20
- 3/4
- 9/20
- In a meeting there were 7354 people. The number of men was 1022 more than that of women. How many men attended the meeting?
- 6332
- 5210
- 4188
- 3166
- Josphine bought the following items from a shop
2½bars of soap @sh 120
1¼kg of sugar @sh 320
2 - 2kg packets of flour at sh 80
0.5kg of rice at sh 80
How much did she pay for the items?- Sh 1060
- Sh 980
- Sh 1100
- Sh 900
- A square piece of land has an area of 12.25 ha. It was fenced round using 5 strands of wire. What is the length of the wire used?
- 350m
- 7000m
- 1400m
- 70m
- The figure below represents a gate. Line AB=ED=12m, line AF=FE 5m, line FC = 15m.
Both sides of the gate were painted. Calculate the area that was painted.- 67.5m2
- 120m2
- 135cm2
- 270m2
- Given that m=12, n=½m and w=5. What is the value of:
½(2m+nw) - n2 +2m?- 15
- 27
- 9
- 21
- Jerome paid sh 840 for a shirt after he was given a discount of 30%. How much more was the marked price than the selling price?
- Sh 1200
- Sh 1140
- Sh 300
- Sh 360
- Tamara can sweep a room in 8 minutes, Jane can sweep the same room in 12 minutes. How long would the two girls take to sweep the same room together?
- 4 min 48 seconds
- 20 minutes
- 5 minutes
- 4 minutes, 4/5 seconds
- The pie chart below shows how pupils chose their favourite games and sports.
If 18 pupils chose football, how many pupils were there altogether in that class?- 36
- 48
- 54
- 60
- A motorist left town A for town B a distance of 120km at a speed of 60km/h. After 30 minutes he got a puncture which took 30 minutes to repair. After repair he travelled the remaining distance at a speed of 45km/h. What was his average speed for the whole journey?
- 52½ km/h
- 40km/h
- 60km/h
- 45km/h
- Find the value of x in x − 1 + 3x + 3 = 11
5 4- 6
- 8
- 9
- 11
- The table below shows the amount of milk produced by cows in the Okoloi's farm in one week
Days Mon Tue Wed Thur Fri Sat Amount in lItres ____ 73 ____ 78 80 76
The average amount of milk produced in the six days was 75 litres. If 5 more litres were produced on Monday than on Wednesday. How many litres were produced on Monday?- 74
- 69
- 143
- 138
- A closed cylinder has a diameter of 28cm and a height of 30cm. What is the surface area when open at the top?
- 2640cm2
- 3256cm2
- 1184cm2
- 3872cm2
- Mr Mugo spends 25% of his salary on food, 35% on rent, 16% on fees and saves the rest which is sh 6000. What is his monthly salary?
- Sh 24000
- Sh 18000
- Sh 25000
- Sh 30000
- A car travelling at a speed of 72km/h took one minute to cross a tunnel. How long is the tunnel in kilometres?
- 1200
- 1.2
- 7.2
- 72
- Construct triangle EFG in which angle EFG = 60°, line EF = 6cm and FG = 7cm. Draw a circle touching the 3 vertices of the triangle. What is its radius?
- 7.6cm
- 2.1cm
- 4.2cm
- 3.8cm
- The temperature of ice was 15°C below the melting point. After heating for 5 minutes the temperature rose to 48°C. What was the rise in temperature?
- 48°C
- 33°C
- 63°C
- 38°C
- A room measured 8m in length, 6m in width and 5m in height. Windows and doors covered 14m2. If the inner walls were painted what was the area painted?
- 140m2
- 236m2
- 126m2
- 222m2
- The sum of the area of the two squares formed on the two shorter sides of a right-angled triangle is 42.25cm2. If its base length is 2.5cm. Calculate height of the triangle?
- 6.5cm
- 4cm
- 8cm
- 6cm
- How many cubes are used to make the stack below?
- 88
- 84
- 80
- 120
- In a school, lessons take 45 minutes. The lessons start at 8:20 am and ends at 3:20 pm. All the breaks take 2½ hours. How many lessons are there in a day?
- 7
- 8
- 6
- 9
- Joseph is twice as old as Sarah and Hillary is 6 years younger than Joseph. If Sarah is y years. Write an expression to show the sum of their ages in two years time?
- 5y + 6
- 5y− 6
- 5y
- 5y + 12
- Work out 45.6 + 0.24 x 7.2 − 4.5
0.36 x 0.96- 46.1
- 123.92
- 63.62
- 41.1
- Simplify:2/5 (25x − 20) − 3(1/3x+1)
- 11x − 11
- 11x − 5
- 9x − 11
- 9x− 5
- The sum of three consecutive odd numbers is 111. Which is the smallest number among them?
- 36
- 35
- 37
- 39
- What is the area of the shaded part in the figure below?
- 56cm2
- 112cm2
- 196cm2
- 98cm2
- In a class two fifth are boys. If there are 18 girls, how many more girls than boys are in that class?
- 12
- 3
- 9
- 6
- A trader bought 500 oranges for sh 4000.During the transportation 20 of them got spoilt. She sold the remaining in piles of 3 at sh 30. What percentage profit did she make?
- 10%
- 25%
- 20%
- 15%
- A family uses three - 200ml packets of milk everyday. How many litres of milk does the family use in the month of January and February 2020?
- 36
- 360
- 18
- 35.4
- After a salary increase of 20%, Jane now earns sh 10728. How much did she earn before the increase?
- Sh 7152
- Sh 8940
- Sh 1788
- Sh 12873.60
- In the figure below line WX is parallel to YZ. Line YX bisect angle WYZ. Line MW = MX, angle WYX = 25°.
Find angle YXZ.- 50°
- 750°
- 1050°
- 80°
- The hire purchase price of a TV set is 15% more than the marked price. The marked price is sh 20000. When buying through hire purchase, a deposit is required followed by monthly instalments of sh 1050 for 18 months. How much deposit is required?
- sh 1100
- sh 2100
- sh 3100
- sh 4100
- What is 12.5% as a fraction in simple form?
- ¼
- 1/80
- 1/8
- 1/40
- The net below was folded to form a solid.
What is the sum of faces and vertices of une solid forined?- 11
- 10
- 12
- 9
- What is the sum of the next two numbers in
7, 14, 25, 38,___,___- 129
- 124
- 123
- 127
- The perimeter of the figure below is 50cm.
Calculate its area.- 60cm2
- 120cm2
- 80cm2
- 90cm2
- What is the capacity of the through drawn below in dl?
- 2.31
- 2310
- 231
- 23100
- A lorry was loaded with 40 bags of beans each weighing 110kg. When half of the was off loaded, the lorry weighed 5.7 tonnes. What is the mass of the empty lorry?
- 3.5t
- 3t
- 3.2t
- 3.7t
- The graph below shows thea number of pupils who were present in a class of 50 pupils in one week.
What is the average number of pupils who were present that week?- 231
- 3.8
- 19
- 46.2
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Tagged under
Wednesday, 15 September 2021 09:20
Ratio And Proportion - Class 8 Mathematics Revision Notes
Ratio And Proportion
Worked Exercise
- Muraya and Dan each made 126kg of a mixture of maize and beans. Muraya mixed maize and beans in the ratio 4:3 while Dan mixed maize and beans in the ratio 4:3 while Dan mixed maize and beans in the ratio of 5:4. How many more kilograms?
- 2
- 3
- 4
- 6
Working
In Muraya’s mixture, maize: beans = 4:3
maize = Ratio of maize/Total ratio x No of kg
=4/7 x 126
72kg
In Dan’s mixture, maize: beans = 5: 4
Maize = Ratio of maize/Total ratio x No of kg
=5/7 x 126
= 70kg
Difference = ( 72 - 70 )kg
= 2kg
The correct answer is A (2kg)
- A rectangular plot measures 12m by 10m.The length of the plot is increased in the ratio 3:2 , while the width is decreased in the ratio 4;5.By what ratio is the area of the plot decreased?
- 4:3
- 5:4
- 6:5
- 3:2
Working
New length after increase
3/2 x 12 = 18m
New width after decrease
4/5 x 10 = 8m
Original area before the increase/decrease
= (12 x 10) m2
= 120m2
New area = (18 x 8) m2
= 144 m2
New ratio = 144: 120
= 6 : 5
The correct answer is C (6: 5).
- Gladys keeps hens, ducks, and turkeys. The ratio of hens to ducks is 5:2. The number of turkeys is 35 less than the number of hens. How many turkeys are there if there are 30 ducks?
- 105
- 40
- 75
- 65
Working
Hens : ducks = 5 : 2
Total ratio = 7
Ducks = 2/5
Hens = 5/7 of x
Therefore 2/7 of x = 30
x = 30 x 7/2
x = 105 (Total hens and ducks)
Hens =5/7 x 105
= 75
Turkeys = (75 – 35)
The correct answer is B (40)
- Elijah and Paul shared some money in the ratio 5:8.Elijah got sh120 less than Paul. How much money did Paul get?
- Sh520
- Sh320
- Sh200
- Sh192
Working
Let the amount Paul got be t
Therefore Elijah got (t-120)
Therefore t -120 : t = 5 : 8
t – 120/t = 5/8
8t – 960 = 5t
8t – 5t = 960
3t = 960
t = sh320
Therefore Paul got = sh 320
The correct answer is B (sh320)
- A contractor employed 60 men to complete a piece of work in 150 days. How many more days would 50 men take to complete the same work?
- 180
- 30
- 40
- 50
Working
60 men take 150 days
1 man take (150x60) days
Therefore 50 men will take 150 x 60/50 days
= 180 days
How many more? (180 – 150) days
= 30 days
The correct answer is B (30 days)
- Eighteen men can finish to dig a piece of land in 45 days. How many days would 15 men take to finish the same piece of land?
- 54
- 2
- 7½
- 9
Working
18 men take 45 days
1 man takes (45 x 18) days
Therefore 15 men will take 45 x 18/15
= 54 days
The correct answer is A (54 days)
Published in
Mathematics Class 8 Notes
Tagged under
Wednesday, 15 September 2021 09:03
Scale Drawing - Class 8 Mathematics Revision Notes
Scale Drawing
Worked Exercise
- The distance between two villages is 6.4KM. On the map of the region this distance is represented by a line 1.6 cm long. What is the scale of the map?
- 1: 400000
- 1: 40000
- 1: 4000
- 1: 4
Working
Actual distance = 6.4 km
Drawing length = 1.6cm
1 cm on the map = 6.4/1.6
= 4km on the ground
But 1 km = (1000 x 100) cm
4km = 4 x 1000 x 100
= 400000cm
Therefore scale = 1: 400000
The correct answer is A (1: 400000)
- A rectangular field measures 105 m. On a scale drawing of the field, the longer side is 7cm.What is the measurement of the width on this scale drawing?
- 5 cm
- 50 cm
- 500 cm
- 7.35cm
Working
7 cm represents 105 m
1 cm represents (105 ÷ 7)
Scale used,
1 cm represents 15m
? 75m
= (75 x 1)/15
5cm
The correct answer is 5cm (A)
- The scale on a plan is 1:20. How many cm will represent 1m on this plan?
- 50 cm
- 50 cm
- 5 cm
- 2 cm
Working
1 : 20 scale means 1 cm on a drawing represents 20 cm on the ground.
1 cm represents 20cm
? 100cm
=100/20
= 5cm
The correct answer is C (5cm)
- A rectangular field measuring 720m by 550m is to be represented on a scale drawing using the scale 1: 10,000. What is the perimeter of the drawing in centimetres?
- 0.254
- 2.54
- 25.4
- 254
Working
1: 10000 means 1 cm on the map represents 10000 cm on the ground
If 1 cm = 10,0000cm
? = 72,000cm
= (72000/10000) cm
= 7.2cm
If 1cm = 10,000cm
= 55,000cm
= ( 55,000/10,000 ) cm
= 5.5cm
Perimeter
P = 2(L+W)
= 2 (7.2 + 5.5)
= 25.4 cm
The correct answer is (C)
- The scale of a map is 1: 50000. What is the length of this map of a road 20km long?
- 40cm
- 400 cm
- 4000 cm
- 4 cm
Working
Scale 1 : 50000 means 1cm on the map represents 50000 cm on the ground.
20 km = 20 x 1000 x 100
= 2000000 cm
50,000cm represents = 1 cm
2,000,000 represents = 2,000,000 ÷ 50,000
= 40cm
The correct answer is A (40 cm)
Published in
Mathematics Class 8 Notes
Tagged under
Wednesday, 15 September 2021 08:28
Algebra - Class 8 Mathematics Revision Notes
Algebra
Worked Exercise
- What is the value of x in the equation?
2(3x – 2) = 3x + 8- 12
- 3
- 5
- 4
Working 2 (3x – 2 ) = 3x + 8
Step 1: Open brackets 6x – 4 = 3x + 8
Step 2: Collect like terms and simplify 6x – 3x = 8 + 4 3x = 12 x = 4
The correct answer is D (4)
- Francis has r shillings. John has s shillings. Ouma has sh.150 less than the total money of both Francis and John. Which one of the following expressions gives the total amount of money do the three men have?
- 2r + 2s – 150
- r + s – 150
- 2r + 2s + 300
- r + s + 300
Working
Francis = r
John = s
Ouma = r + s - 150
Total money = r + s + r + s – 150
= 2 r + 2s – 150
The correct answer is A (2r + 2s – 150)
- If x = 2, y = z - x and z = 3, What is the value of
3x – 4y + 2z
2 (x + 2y – z)- 8
- 5
- 7
- 4
Working
Substitute the values of x, y, and z
= (3x2) – (4x1) + (2x3)
2 (2+2 x 1 - 3)
= 8/2 = 4
The correct answer is D (4)
- In a meeting there were 30 women than men and three times as many men as children.If there were 1,360 people altogether. What was the number of children in the meeting?
- 220
- 190
- 600
- 570
Working Men 3x
Children x
Women 3x + 30
Total 7x + 30 = 1360
7x = 1360- 30
7x = 1330
x = 190
Children are 190
The correct answer is B (190)
- What is the value of p in the equation?
¾(8p- 4) = 4p +7- 2
- 5
- 5½
- 2 3/8
Working
¾(8p - 4) = 4p +7
6p – 3 = 4p + 7 (opening brackets)
6p – 4p = 7 + 3 (collecting like terms)
2p = 10
p = 5 (Simplifying)
The correct answer is B (5)
- Omammo is two years older than Temo and three years younger than Mbeti. The sum of their ages is 64 years. If Omamo’s age is m, which of the following equations below can be used to find Omamo’s age?
- 3m + 1 = 64
- 3m – 1 = 64
- 3m – 5 = 64
- 3m + 5 = 64
Working
Omamo = m
Temo = m- 2
Mbeti = m + 3
Total age = 64
X + m – 2 + m + 3 = 64
m + m + m – 2 + 3 = 64
3m + 1 = 64
The correct answer is A (3m + 1 ) = 64
- What is the simplified form of 5x + (8x – 2y)
- 37x – 8y
- 7x –
- 28x – 2y
- 7x – 2y
Working
5x + ¼(8x – 2y ) open brackets
5x + 2x – ½y simplify
= 7x – ½y
The correct answer is B (7x – ½y)
Published in
Mathematics Class 8 Notes
Wednesday, 15 September 2021 07:56
Geometry - Class 8 Mathematics Revision Notes
Geometry
Worked Exercise
- Find the value of x in the following.
Working
X+45+50=1800 (Angles on a straight lines are supplementary i.e. add up to 180º )
X+95=180º
X=85º
The value of x =85º - Find the sum of angle “a” and angle “b” in the figure below.
Working
Lines AB and C D are transversals are Therefore 90+b = 1800
Co-interior angles - supplementally
Therefore b=180-90
B = 90º
Angle a = 120º - (Corresponding angles)
Therefore a = 120º
Sum of a and b
=120 + 90
= 210º - Find the size of angle marked A B D in the figure below.
X+4x+x+30=180º (angles on a straight line are supplementary)
= 6x+30=180
6x=180-30
6x = 150
X = 25
Angle A B D =x + 4X
But x = 25
Therefore 25 + (4 x 25)
= 25 + 100
= 125º - Draw an equilateral triangle A B C where Line AB = 6cm.
Draw a circle touching the 3 vertices of the triangle. What is the radius of the circle?
Working
Steps:- Draw line A B = 6cm
- With A as the Centre with the same radius 6cm, mark off an arc above line A B.
- With B as the Centre with the same radius 6cm, mark off an arc above line A B to meet the arc in (II) above. Call the point of intersection point C
- Join C to A and C to B
- Bisect line A B and B C and let the bisectors meet at point X.
- With X as the Centre, draw a circle passing through points A, B and C.
- Measure the radius of the circle.
- Construct a triangle P Q R in which Q P = 6cm. Q R = 4cm and P R =8cm. Draw a circle that touches the 3 sides of the triangle, measure the radius of the circle.
Working- Draw line Q P 6cm
- With Centre Q, make an arc 4cm above line Q P.
- With Centre P, make an arc 8cm above line Q P and let the arc meet the one in (II) above. Label the point of intersection as R.
- Join R to P and R to Q.
- Bisect any two angles and let the bisectors meet at point Y.
- With Y as the Centre, draw a circle that touches the 3 sides of the triangle.
Construction
R = 3.5cm
- A rectangle measures 6cm by 2½ cm. What is the length of the diagonal?
Working
AC2 = AB2 + BC2 [ Pythagoras Theorem]
AC2 = 62 + 2 ½2
AC2 = 36 + 6.25
AC2 = 42.25
AC = √42.25
= 6.5 or 6 ½
NB: The Pythagoras theorem states
H2 =B2 +h2
h2 = H2 – b2
b2 = H2 –h2 - In the figure below, A B C is a straight line and B C D E is a quadrilateral. Angle CBD = 620 and lines EB = BD = DC. Line EB is parallel to DC.
What is the size of angle BDE?
Working
Consider triangle BCD (isosceles triangle)
Therefore base angles are equal
CBD = 62º
BCD = 62º
Therefore, BDC = 180 – 124 = 56º
Angle CDB = angle EBD [Alternate triangle]
Therefore EBD = 56º
Angle BDE =180 - 56/2
= 62º
Therefore, BDE = 62º - Find the size of the largest angle from the following triangle.
Working
4X – 10 + x – 20 + 3x + 10 = 180 [Angle sum of a triangle]
8x – 20 = 180
8x = 200
X = 25
4x – 10 = (100 – 10)º
= 90º largest angle.
Published in
Mathematics Class 8 Notes