Questions
Instructions.
- Answer all questions in the spaces provided.
- Express the following numbers in words. (2mks)
- 14633001
- 30000010
- A matatu charges sh. 120 as fare from town A to town B. It has a capacity of 18 passangers. How much money does it make in one day covering 10 trips with full capacity. (3mks)
- Use the divisibility test of 11 to check whether the following numbers are divisible by 11. (2mks)
- 1048564
- 1120043
- Use Bodmas to evaluate. (3mks)
½ (3/5 + ¼ (7/3 – 3/7 ) of 1 ½ ÷ 5)
3 5/7 - Victoria spent ¼ of his net January salary on school fees. She spent ¼ of the remainder on electricity and water bills. She then spent 1/9 of what was left on transport. If she finally had sh. 3400. What was her net January salary. (3mks)
- Using mathematical tables evaluate.
- 73402 (1mk)
- 14.52 + 0.7142 (2mks)
- Given that a:b = 1:2 and b:c = 3:4. Find a:b:c (1mk
- Three bells ring at intervals 30mins, 35mins and 50 mins. If they ring together at 11:25 p.m on Monday at what time and day will they next ring together? (3mks)
- The length of minute hand of a clock is 3.5cm. Find the angle it turns through if it sweeps an area of 4.8cm2. (take π=22/7) (3mks)
- Express the following as a single fraction.
- x-1 + x+2 + x (3mks)
2 4 5 - ax – ay + bx –by (2mks)
a+b
- x-1 + x+2 + x (3mks)
- Fifteen tractors each working eight hours a day takes eight days to plough a piece of land. How long would it take 24 tractors each working 10 hours a day to plough the same piece of land. (3mks)
- Use factor tree to decompose 256 into prime factors. (2mks)
- Juma, Ali and Hassan share the profit of their business in the ratios 3:7:9 respectively. If Juma receives sh. 6000. How much profit did the business yield. (3mks)
- Use bodmas to evaluate: (4mks)
5x6-76÷4+27÷3
4-2x4+36÷4 - A Kenyan bank buys and sells foreign currency as shown in the table below.
Buying (ksh) Selling (ksh) 1 us dollar 95.34 95.87 1 uk pound 124.65 125.13 - How much kshs did he receive? (2mks)
- He later spend sh. 125340 while in Kenya. He converted the remainder in dollars. How many dollars did he receive? (3mks)
- A metallic cuboid measuring 16cm by 8cm by 4cm was melted. The material was used to make a cube. What is the length of the cube. (3mks)
- Find a if a2 = b2 + c2 given that b=2 c=3.5. (2mks)
- Below is a travel timetable for a vehicle operating between towns A and D 70 km apart.
Town Arrival Departure A 10.10 am B 10.30 am 10.40 am C 11.00 am 11.05 am D 11.20 am - At what time does the vehicle depart from town A? (1mk)
- How long does it take to travel from town A to town B? (1mk)
- For how long does it stay in town B? (1mk)
- At what time does it arrive in town D? (1mk)
- What is the average speed of the whole journey? (3mks)
- A football match lasts 90 minutes with a break of 15 minutes at half time. If a referee allows five minutes extra for injuries and stoppages, what time does a match which kicks off at 4:30 pm end? (3mks)
- A rectangular plot measures 100m by 200m. Determine:
- Its perimeter in km. (2mks)
- Its area in m2. (2mks)
- Its area in ha. (2mks)
- Square tiles of 100cm by 100cm are used to cover the floor. How many tiles are used? (2mks)
- If the cost of 1 tile is sh. 25. How much money will be spent on tiles. (2mks)
Marking Scheme
- Express the following numbers in words. (2mks)
- 14633001
- Fourteen million six hundred and thirty three thousand and one.
- 30000010
- Thirty million and ten.
- 14633001
- A matatu charges sh. 120 as fare from town A to town B. It has a capacity of 18 passangers. How much money does it make in one day covering 10 trips with full capacity. (3mks)
- 120 x 18 = 2160
1 trip = 2160
10 trips = 2160 x 10
= shs. 21,600
- 120 x 18 = 2160
- Use the divisibility test of 11 to check whether the following numbers are divisible by 11. (2mks)
- 1048564
- ( 1 + 4 + 5 + 4 ) – (0 + 8 + 6)
14 – 14 = 0
Divisible.
- ( 1 + 4 + 5 + 4 ) – (0 + 8 + 6)
- 1120043
- ( 1 + 2 + 0 + 4 ) – ( 1 + 0 + 4)
7 – 5 = 2
Not divisible
- ( 1 + 2 + 0 + 4 ) – ( 1 + 0 + 4)
- 1048564
- Use Bodmas to evaluate. (3mks)
- ½( 3/5 + ¼ (7/3 – 3/7 ) of 1 ½ ÷ 5)
½ (3/5 + (40/21) of 1 ½ ÷ 5)
½ ( 3/5 + 10/21 x 3/2 x 1/5)
½ (3/5 + 1/7)
½ (26/35) = 13/35
13/35 ÷ 35/7
13/35 x 7/26
=1/10
- ½( 3/5 + ¼ (7/3 – 3/7 ) of 1 ½ ÷ 5)
- Victoria spent ¼ of his net January salary on school fees. She spent ¼ of the remainder on electricity and water bills. She then spent 1/9 of what was left on transport. If she finally had sh. 3400. What was her net January salary. (3mks)
- School fees= ¼
Electricity = ¼ x ¾ = 3/16
Transport = 1/9 x 9/16=1/16
Total = ½
½ = 3400
Total salary = shs. 6800
- School fees= ¼
- Using mathematical tables evaluate.
- 73402 (1mk)
- 7.340 x 103
53.88 x 106
5.388 x 107
- 7.340 x 103
- 14.52 + 0.7142 (2mks)
- 7.14 x 10-10 = 50.98 x10-2
210.3 + 0.5098
= 210.8098
- 7.14 x 10-10 = 50.98 x10-2
- 73402 (1mk)
- Given that a:b = 1:2 and b:c = 3:4. Find a:b:c (1mk)
a:b:c (1x3) (2 x 3) (2 x 4) 1:2 a: b: c: 3:4 3 6 8 - Three bells ring at intervals 30mins, 35mins and 50 mins. If they ring together at 11:25 p.m on Monday at what time and day will they next ring together. (3mks)
2 3
03
55
05 1
53
52
53 3 7 5 5 1 7 5 7 1 7 1
7hr 30mins
2325 6:50 a.m
730
2050 Tuesday - The length of minute hand of a clock is 3.5cm. Find the angle it turns through if it sweeps an area of 4.8cm2. (take π=22/7) (3mks)
- A= Ѳ x πr2
360
4.8 = Ѳ x 22/7 x 3.52
360
Ѳ = 44.88O
- A= Ѳ x πr2
- Express the following as a single fraction.
- x- 1 + x + 2 + x (3mks)
2 4 5- 10 (x – 1) + 5 (x +2) + 4 (x)
20
10x – 0 + 5x + 10 + 4x
20
19/20x
- 10 (x – 1) + 5 (x +2) + 4 (x)
- ax – ay + bx –by (2mks)
a+b- a(x-y) + b (x – y)
a+b
(a+b) (x-y) = x-y
a+b
- a(x-y) + b (x – y)
- x- 1 + x + 2 + x (3mks)
- Fifteen tractors each working eight hours a day takes eight days to plough a piece of land. How long would it take 24 tractors each working 10 hours a day to plough the same piece of land. (3mks)
Tractors hours Days 15
248
108
?15x 8 x 8
24 x10
= 4 days - Use factor tree to decompose 256 into prime factors. (2mks)
- 256 = 2x128 2 x 8
2 x 64 2 x 4
2 x 32 2 x 2
2 x 16 2 x 2 x2 x 2 x 2 x 2 x2 = 27
- 256 = 2x128 2 x 8
- Juma, Ali and Hassan share the profit of their business in the ratios 3:7:9 respectively. If Juma receives sh. 6000. How much profit did the business yield. (3mks)
- 3=6000
19 = ?
=19 x 6000
3
= shs 38000
- 3=6000
- Use bodmas to evaluate: (4mks)
- 5 x 6 - 76 ÷ 4 + 27 ÷ 3
4-2x4+36÷4
30 – 19 + 9 4 – 8 + 9
20 5
= 20/5
= 4
- 5 x 6 - 76 ÷ 4 + 27 ÷ 3
- A Kenyan bank buys and sells foreign currency as shown in the table below.
Buying (ksh) Selling (ksh) 1 us dollar 95.34 95.87 1 uk pound 124.65 125.13
A tourist arrived in Kenya with 15000 pounds which he converted in kshs.- How much kshs did he receive? (2mks)
- 15000 x 124.65
= 1869750
- 15000 x 124.65
- He later spend sh. 125340 while in Kenya. He converted the remainder in dollars. How many dollars did he receive? (3mks)
- 1867950
-125340
1,744,410
= 1744410
125.13
= 13940.78 dollars
- 1867950
- How much kshs did he receive? (2mks)
- A metallic cuboid measuring 16cm by 8cm by 4cm was melted. The material was used to make a cube. What is the length of the cube? (3mks)
- V = L x W x h
= 18 x 8 x 4
= 512
Volume cube = L x L x L
= 512cm3
Length = 3√512
= 8 cm
- V = L x W x h
- Find a if a2 = b2 + c2 given that b=2 c=3.5. (2mks)
- a2= 22 + 3.52
a2 = 16.25
a= 4.031
- a2= 22 + 3.52
- Below is a travel timetable for a vehicle operating between towns A and D 70 km apart.
Town Arrival Departure A 10.10 am B 10.30 am 10.40 am C 11.00 am 11.05 am D 11.20 am - At what time does the vehicle depart from town A? (1mk)
- 10.10 am
- How long does it take to travel from town A to town B? (1mk)
- 20 mins
- For how long does it stay in town B? (1mk)
- 10 mins
- At what time does it arrive in town D? (1mk)
- 11:20 a.m
- What is the average speed of the whole journey? (1mk)
- S= D = 70
T 11/6
= 60km/hr
- S= D = 70
- A football match lasts 90 minutes with a break of 15 minutes at half time. If a referee allows five minutes extra for injuries and stoppages, what time does a match which kicks off at 4:30 pm end? (3mks)
- 90 + 15 + 5 = 1 hr 50 mins
16:30
1 :50
14:40 hrs
2:40p.m
- 90 + 15 + 5 = 1 hr 50 mins
- At what time does the vehicle depart from town A? (1mk)
- A rectangular plot measures 100m by 200m. Determine:
- Its perimeter in km. (2mks)
- = 2 (100+200)
1000
= 0.6 km
- = 2 (100+200)
- Its area in m2. (2mks)
- = 100 x 200
= 20,000m2
- = 100 x 200
- Its area in ha. (2mks)
- 20000 = 2ha
10000
- 20000 = 2ha
- Square tiles of 100cm by 100cm are use to cover the floor. How many tiles are used? (2mks)
- = 10000 x 20000
100 100
= 100 x 200
= 20,000 tiles
- = 10000 x 20000
- If the cost of 1 tile is sh. 25. How much money will be spent on tiles. (2mks)
- 20,000 x 25
= 500,000
- 20,000 x 25
- Its perimeter in km. (2mks)
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