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KNEC KCSE Mathematics Paper 2 – 2014 Gatundu Mock

KNEC KCSE Mathematics Paper 2 – 2014 Gatundu Mock

2014 Gatundu Mock

Mathematics Paper 2

SECTION I (50 Marks)



Simply without using tables or calculators:

Mathematics Paper 2 Question Paper - 2014 Gatundu Mock

 3 marks


Using a ruler, a set square and a pair of compasses only,
(a) Draw a line AB = 5cm (1 mark)
(b) Divide the above line into 9 equal parts. (2 marks)

 3 marks


Simplify Mathematics Paper 2 Question Paper - 2014 Gatundu Mock

 4 marks


(a) Expand and simplify Mathematics Paper 2 Question Paper - 2014 Gatundu Mock (2 marks)

(b) Hence use the above expansion to evaluate (1.03)4 to 4 s.f (2 marks)

 4 marks


A circle whose equation is (x – 1)2 + (y – k)2 + (y-k)2 = 10 passes through the point (2, 5). Find the
coordinates of the two possible centres of the circle.

 3 marks


(a) Find the inverse of the matrix Mathematics Paper 2 Question Paper - 2014 Gatundu Mock (2 marks)

(b) Hence determine the point of intersection of the:
y + x = 7
3x + y = 15 (2 marks)

 4 marks


Waiguru invested shs.6000 for 1 ½ years at 12% p.a compounded quarterly. Determine:
(a) The amount accruing at the end of 1 ½ years. (3 marks)
(b) Interest earned. (1 mark)

 4 marks


Given that y2 is inversely proportional to x and y = 1.5 when x = 2/3, find the value of y when x = 6.

 3 marks


A single unbiased dice is thrown once. Find the probability that the score will be:
(a) even (1 mark)

(b) a multiple of 3 (1 mark)

 2 marks


Two types of tea which cost ksh.200 per kg and ksh 250 per kg are mixed so that their weights are in
the ratio 5:3 respectively. Calculate the cost of 20kg of the mixture.

 3 marks


A plane flies from Cairo (40oN, 30oE) to Harare ( So, 30oE) a distance of 3,300nm. Determine the
latitude θS​o.

 3 marks


Find the percentage error in evaluating (x + y) – z ; if x = 3.2cm, y = 5.6cm and z = 2.4cm.

 3 marks


Without using calculator or mathematical tables; Find the sums of the first 20 terms of the series:
log2 + log 4 + log 8 + log 16 + —————-

 3 marks


Q represent a positive quarter turn about (0, 0) and R is the reflection in the line y-x=0. Find QR (2, 1)

 3 marks


Find the acute angel y if cos 4y = sin 2y.

 2 marks


In the diagram below, O is the centre of the circle SPQ. Angle SOQ = 130o

Calculate angle:
(a) ro (1 mark)

(b) po (2 marks)

 3 marks

SECTION II (50 Marks)



The vectors a and b are not parallel. Given that
(a) 3a + hb = ka + 2b. Find the values of the scalars h and k. (3 marks)
(b) The position vectors of points A and B relative to a point of origin O are a and respectively. C
is the point on AB such that AC:CB = 5:3. Express in terms of a and b the vectors.
Mathematics Paper 2 Question Paper - 2014 Gatundu Mock
(c) (i) D is a point on OB such that OD = b. Express Mathematics Paper 2 Question Paper - 2014 Gatundu Mock in terms of a , b and . (2 marks)

(ii) Find the value of ; if OA is parallel to DC. (1 mark)

 10 marks


18. Complete the table below for graphs of:
y = 3 sin (2x – 30o) and y = sin x for -120o< x < 120o

(a) Correct to 2 d.p.

xo -120o -90o -60o -30o 0o 30o 60o 90o 120o
y=sin xo -0.87 -1.00 -0.50 0 0.87 1.00
y = 3sin (2x-30o) 1.50 -3.00 -1.50 1.50 1.50

(b) On the grid provided; draw the graphs on the same axes of: y = sin x and y = 3 sin (2x – 30o) (4 marks)
Take the scale: 1cm for 15o on x-axis and 2cm for 1 unit on the y-axis.

(c) State the amplitude and period of each wave. (2 marks)

Mathematics Paper 2 Question Paper - 2014 Gatundu Mock

(d) Find the value of x: for which Sin (2x – 30o) – 1/3 sin x = 0. (2 marks)

 10 marks


The heights to the nearest centimeter of 100 boys were recorded as shown below

Heights 140-145 146-151 152-157 158- 163 164-169 170-75 176-181 182-187 188-193 194-199
Frequency 3 4 7 10 10 15 25 16 8 2

Using an assumed mean of 166.5
(a) Calculate the mean (5 marks)

(b) The variance (3 marks)

(c) The standard deviation (2 marks)

 10 marks


P and V are connected by the law P = KVn where k and n are constants. The table below shows values
of P and V.

V 2 2.3 3 3.5 4
P 288 503.7 1458 2701 4608
_ _ _ _ _ _
_ _ _ _ _ _

(a) Express P = KVn in linear form. (1 mark)

(b) Complete the table and draw a linear graph to represent the information given above. (4 mark)
(c) Find the values of k and n (2 marks)
(d) Find the law connecting p and v. (1 mark)
(e) Find the value of p when v = 6. (2 marks)

 10 marks


An institute offers two types of courses, veterinary and Agriculture. The institute has a capacity of 500 student. There must be more Agriculture students than Veterinary students. At least 200 students must take veterinary courses. If x represent the number of veterinary students and y the numbers of
Agriculture students.
(a) Write down three inequalities that describe the given conditions. (3 marks)

(b) On the grid provided, draw the three inequalities. (3 marks)

Mathematics Paper 2 Question Paper - 2014 Gatundu Mock

(c) If the institute makes a profit of shs.25,000 to train one veterinary student and shs. 10,000 to
train one Agriculture student, determine:

(i) The number of students that must be enrolled in each course to maximize the profit.
(2 marks)
(ii)The maximum profit. (2 marks)

 10 marks


Use a ruler and compasses only in this question.
The diagram below shows a square ABCD.

Mathematics Paper 2 Question Paper - 2014 Gatundu Mock

(a) Construct two circles with centre O, with one passing through the vertices ABCD and the other one,
touching the four sides of the square ABCD (4 marks)

(b) (i) Locate point P if BPC is the tangent of the smaller circle. (1 mark)
(ii)Show the locus of a point T inside the square such that <APB = <ATB (3 marks)

(c) (i) Point Q is the point where the locus b(ii) above meets side AD. Label the locus of point Q.
(1 mark)

(ii) Shade the locus of a region R inside the square such that <QRP 90o and above the locus of point T. (1mark)

 10 marks


In the figure below Angle CBD = 37o, angle BCD = 20o and ABC is a tangent to the circle at B.
(a) Find:
(i) Angle BED (2 marks)
(ii) Angle ABE (1 mark)

(iii) Angel BDC (1 mark)
(b) With reasons state whether triangle BDC is similar to triangle CBE. (2 marks)
(c) Given that the radius of the circle is 2.5 cm and the length BC= 6cm, find the length EC using the
cosine rule. (4 marks)

 10 marks


The displacement in metres of a particle from a point O after t seconds is given by s=t(t-2)t-1); Find :
(a) The speed of the particle when t = 2 seconds. (3 marks)
(b) Its minimum speed. (2 marks)
(c) The time when the particle is momentarily at rest. (3 marks)​

(d) It acceleration when t = 3 seconds. (2 marks)

 10 marks

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