QUESTIONS
SECTION 1-50 MARKS (ANSWER ALL THE QUESTIONS)
- A stop watch reads correct to 1/5 seconds. Two races are timed as 493/5 seconds and 494/5 seconds. Calculate the maximum percentage error in sum of these two timings (3 marks)
- Construct, using a scale of 1:100 construct a trianguiar plot ABC where AB=6m, AC-7m and BC-7.5m using AB as the base. Cows are allowed to graze inside the plot provided that they are at least 2 meters from AB and more than 3 meters from C. Indicate by shading the area available for grazing. (4 marks)
- Simplify without using calculators or mathematical tables, the value of(3 marks)
8 - √60/2 + √5+√3
√5-√3 - Use binomial expansion to determine the value of (1½)5 (3 marks)
- The mean and standard deviation of the marks scored by a group of 10 students was found to be 47 and 11 respectively. An eleventh student had a score of 58 marks. Calculate the mean and standard deviation of the 11 students. (4 marks)
- Two pipes fill a swimming bath in 12 hours. The larger pipe is 331/3 more efficient than the smaller pipe. How long does the larger pipe take to fill the bath? (3 marks)
- Given that S = (1 - rn) make n the subject of the formula.
1 - r - State the amplitude and the period of the following function y=tan 3x
- In a Geometric Progression, the first term is 2 and the common ratio is 2. Given that the product of the last two terms of the GP is 8192, find the sum of the last two terms. (3 marks)
- Given that x=m+ n, and m varies directly as y while n varies directly as the square of y. If x=16, y=2 and when x=33, y=3. Find x when y=8. (3 marks)
- A curve is such that dy/dx = 4-x and the point (2,9) lies on the curve. Find the equation of the curve. (3 marks)
- Given that p=2i-3j+k and q-3i-4j-3k, a point R divides a line PQ externally in the ratio of 4:1. Find the coordinates of R. (3 marks)
- Given that x and y are both positive, solve the equations log(xy) = 7 and log(x/y)=1 (3marks)
- Use the mid-ordinate rule to estimate the area enclosed by the curve y = x2-9, x-axis and the lines x=2 and x-5 using six strips (3marks)
- Find the value of p if ∫30(px2 + 2x + 3)dx = 54
- Solve for x in the domain 0≤x≤2πc
2cos2x= -0.7071 - The table below shows the frequency distribution of marks scored by students in a test.
Marks 1-10 11-20 21-30 31-40 41-50 Frequency 2 4 8 4 2 - On the grid provided, draw an ogive for the data.
- Use your graph to determine;
- The pass mark if only 6 students passed the exam.
- The quartile deviation
- Range of marks scored by the middle 60 % of the students
- A triangle ABC with vertices at A (1,-1), B (3,-1) and C (1, 3) is mapped onto triangle A'B'C' by a transformation whose matrix is(-10 01) Triangle A'B'C' is then mapped onto A''B''C'' with vertices at A"(2, 2), B"(6,2) and C''(2,-6) by a second transformation.
- Find the coordinates of A'B'C' (3 marks)
- Find the matrix which maps A'B'C' onto A''B''C''. (3 marks)
- Determine the ratio of the area of triangle A'B'C' to triangle A"B''C"(1 mark)
- Find the transformation matrix which maps A''B''C'' onto ABC (3 marks)
- The table below shows the taxation rates for income earned.
Income in ksh pm Tax rates (%) 1-9680 10 9681 - 18800 12 18801 - 27920 20 27921 - 37040 25 Excess over 37041 30
House Allowance -Shs. 10,000
Medical Allowance -Shs. 2400
Acting Allowance -Shs. 2820.
He is entitled to a monthly personal relief of KShs. 1162 while 7.5% of his basic salary is tax-exempted.- Calculate Mr. Hamisi's monthly basic salary in KSh. (7 Marks)
- The following deductions also made every month.
- N.H.I.F. KSh. 320
- Co-operative society shares KSh. 6000
- Union dues KSh. 200
Calculate his net monthly salary. (3 Marks)
- The acceleration of a particle, t seconds after passing a fixed-point P is given by a 4t-7. Given that the initial velocity of the particle is 5m/s, find;
- Its acceleration when t = 4 seconds
- Its velocity when t=3 seconds
- Values of t when the particle is momentarily at rest
- Its maximum velocity
- Mr. Mairura has two lorries A and B used to transport at least 42 tons of potatoes to the market. Lorry A carries 4 tons of potatoes per trip while lorry B carries 6 tons of potatoes per trip. Lorry A uses 2 liters of fuel per trip while lorry uses 4 liters of fuel per trip. The two lorries are to less than 24 liters of fuel. The number of trips made by lorry A should be less than the number of trips made by lorry B. Lorry A should make more than 4 trips.
- Taking X to represent the number of trips made by lorry A and Y to represent the number of trips made by lorry B, write the inequalities that represent the above information (4marks)
- Plot the inequalities above in the graph provided below (4 marks)
- If Lorry A makes sh. 35,000 per trip and Lorry B makes sh.28,000 per trip, use the graph above to determine the number of trips made by lorry A and by lorry B to deliver the greatest number of potatoes and hence find the maximum profit. (2marks)
- The position of 3 cities P, Q and R are (15°N, 20°W) (50°N, 20°W) and (50°N, 60°E) respectively.
- Find the distance in nautical miles between:
- Cities P and Q (2 marks)
- Cities Q and R along a circle of latitudes
- A plane left city P at 0250h and flew to city Q where it stopped for 3 hours then flew on to city R, maintaining a ground speed of 900 knots throughout. Calculate:
- The local time at city R when the plane left city P
- The local time (to the nearest minute) at city R when the plane landed at R. (3 marks)
- Find the distance in nautical miles between:
- The figure below represents a cuboid ABCDEFGH, with AB = 7 cm, BC = 24 cm andCF = 7.2 cm. M and N are the mid-points of EF and DC respectively.
Calculate to 2 decimal places the:- Angle AF makes with the plane ABCD (3 marks)
- Angle between the lines HF and AB. (2 marks)
- Angle between the planes GHEF and ABFE (2 marks)
- Angle between BM and the plane ABCD (3 marks)
-
- A jewel is guarded by three guards A, B and C in that order. On his way in, the probability of a thief getting caught by guard A is 2/3, by B is 3/7 and by C is ¼. On his way out, the probability of being caught by guard C is 4/5 , by B is 1/3 and by guard A is 2/5. Calculate the probability that:
- The jewel is stolen and the thief escapes. (2 marks)
- The thief was caught by guard C
- Albert, Bonny and Charles competed in a game of chess. Their probabilities of winning the game are 2/5, 3/5 and 1/10 respectively.
- Draw a probability tree diagram to show all the possible outcomes. (2 marks)
- Calculate the probability that;
- No one loses the game. (2 marks)
- Only one of them wins the game.
- A jewel is guarded by three guards A, B and C in that order. On his way in, the probability of a thief getting caught by guard A is 2/3, by B is 3/7 and by C is ¼. On his way out, the probability of being caught by guard C is 4/5 , by B is 1/3 and by guard A is 2/5. Calculate the probability that:
MARKING SCHEME
- AE =½ x 1/5 = 1/10
AE in sum = 1/10 x 2 = 1/5
% error =1/5 x 100
493/5 + 494/5
= 0.2012% -
- √60/2 = √15x√4
2
= 2√15
2
= √15
√5 + 3 (√5 + 3) = 8 +2√5
√5 - 3 √5 +√3 2
= 4 +√15
8 - √15 + 4 + √15
= 12 - (1)5 + 5(14)(½) + 10(13)(½)2 + 10(12)(½)3 + 5(1)(½)4 + (½)5
= 1 + 5/2 + 5/2 + 5/4 + 5/16 + 1/32
= 7.59375 - Σfx = 47 x 10 = 470
new(x) = 470 + 58
11
= 48
sd = √Σfx2 - (x)2
Σf
112 = Σfx2 - 472
10
Σfx2 = 23300
new sd =√23300 - 482
11
= 10.95 - bigger smaller
1331/3%x x
1hr = 1/x + 4/3x = 1/12
7/3x = 1/12
¾ x = 28
larger pipe = ¾ x 28
= 21hrs - S - Sr = 1 - rn
8n = 1 - s + sr
nlog r = log(1 - S + Sr)
n = log(1 - S + Sr)
log r - a = undefined
period = 180 - (arn-1)(arn-2) = 8192
2 x 2n-1 x 2 x 2n-2 = 213
2n-1 = 213
n = 7
last = 2 x 26 = 128
2nd = 2 x 25 = 64
sum = 128 + 64
= 192 - m x y = m=ky
n x y2 = n=ay2
x = ky + ay2
16 = 2k + 4a
33 = 3k + 9a
k = 2
a = 3
x = 2y + 3y2
x = 2(8) + 3(64)
x = 208 - y = ∫(4 - x)dx
y = 4x - x2 + c
2
9 = 8-2 + c
c = 3
y = 4x - x2 + 3
m:n
4:1- log x + log y = 7
log x - log y = 1
2log y = 6
log y = 3
y = 1000
x = 10000 - A = 0.5(3.9375 + 1.4375 + 1.5625 + 5.0625 + 9.0625 + 13.5625)
A = 17.3125 sq umits - [Px3 + x2 + 3x]30 = 54
9p + 18 = 54
9p = 36
p = 4 - cos 2x = 0.35355
2x = 110.71, 249.29, 470.71, 609.29
x = 55.355, 124.645, 235.355, 304.645
x = 0.3075c, 0.6923c, 1.307c, 1.6925c
Marks 1-10 11-20 21-30 31-40 41-50 Frequency 2 4 8 4 2 cf 2 6 14 18 20 -
-
- 30.5 marks
- 0.25 x 20 = 5th
= 18.5
0.75 x 20 = 15th
= 32.5
32.5 - 18.5
2
= 7
- 0.2 x 20 = 4th → 16.5
0.8 x 20 = 16th → 34.5
range → 16.5 to 34.5
-
-
-
-
- ASF = 4
-
-
-
- gross tax = 5512 + 1162
= 6674
9680 x 0.1 = 968
9120 x 0.15 = 1368
9120 x 0.2 = 1824
9120 x 0.25 = 2280
0.3 x y = 234
y = 780
TI = 9680 + 3(9120) + 780
= 37820
BS = 37820 - (10000 + 2400 + 2820)
= 22600
22600 x 100
92.5
= 24.432.43 - deducstions = 320 + 6000 + 200 + 5512 = 12032
net salary = 39652.43 - 12032
= 27620.43
- gross tax = 5512 + 1162
-
- a = 4(4) - 7
= 9ms-2 - v = ∫(4t - 7)dt
v = 2t2 - 7t + c
s = c
v = 2t2 - 7t + 5
v = 2(9) - 4(3) + 5
v = 2m/s - v = 0
2t2 - 7t + 5 = 0
t2 - 3.5t = -2.5
t2 - 3.5t + (-1.75)2 = 0.5625
t - 1.75 ± 0.75
t = 1.75 ± 0.75
t = 1sec or t = 2.5sec - a = 0
0 = 4t - 7
t = 1.75 sec
v = 2(3.0625) - 7(1.75) + 5
v = -1.125m/s
- a = 4(4) - 7
-
-
- 4x + 6y ≤ 42
- 2x + 4y ≤ 24
- x < y
- x > 4
- x ≥ 0
-
- (6,3) → (6 x 35000) + (3 x 28000)
= 294000
-
-
-
D = 60 x 35
= 2100nm- D = 60 x 80 cos 50
D = 3085.38nm
-
- 80 x 4 = 320min
= 5hrs 20min
0250 + 520 = 8:10
= 0810hrs - Time from P to Q
= 2100 = 21/3
900
Q to R = 3085.38 = 3hrs26min
900
total time = 3hrs26min + 2hr20min + 3hrs
= 8hrs46mins
= 16:56hrs
- 80 x 4 = 320min
-
-
- AC = √242 + 72
= 25cm
tan = 7.2/25
= 16.07 - tan x = 24/7
x = 73.74º - tanθ = 7.2/24
= 16.70º - tanθ = 7.2/23.74
BN = √242 - 3.52
θ = 16.87º
- AC = √242 + 72
-
-
-
1/3 x 4/7 x ¾ x 1/5 x 2/3 x 3/5
= 2/175 - (1/3 x 4/7 x ¼) + (/3 x 4/7 x ¾ x 4/5)
= 4/84 + 4/35
= 17/105
-
-
-
-
- P(ABC)
= 2/5 x 3/5 x 1/10 = 3/125 - ( 2/5 x 2/5 x 9/10) + (3/5 x 3/5 x 9/10) + (3/5 x 2/5 x 1/10)
= 123/250
- P(ABC)
-
-
Join our whatsapp group for latest updates
Tap Here to Download for 50/-
Get on WhatsApp for 50/-
Download Mathematics Paper 2 Questions and Answers - Alliance Mock Examinations 2022.
Tap Here to Download for 50/-
Get on WhatsApp for 50/-
Why download?
- ✔ To read offline at any time.
- ✔ To Print at your convenience
- ✔ Share Easily with Friends / Students