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Mathematics Paper 1

SECTION I (50 Marks)

Answer all the questions in the spaces provided

Using prime factors method, Evaluate

3 marks


Use squares, square roots and reciprocals tables to find the value of

3 marks


Simplify completely :-

3 marks


Solve for x if :

4 marks


A container of height 90cm has a capacity of 25cm3. What is the height of a similar container of volume 0.2litres.

2 marks


The diagram below represents a room in the shape of a cuboid 5m by 6m by 3m. X and Z are midpoints of AD and CG respectively. A spider wishes to travel from H to X to B to Z and Back to H. Draw the net and show the path.

3 marks


a) In May, an insurance salesman collected sh. 400,000 in premiums. If he earns 6.25% commission. How much will he earn? (1mk)

b) In June he collected the same premiums but earned only sh.20, 000 in commission. What was the percentage reduction in his commission rate. (2mks)

3 marks


A1B1C1 is the image of ABC under a rotation. By construction, locate the centre and state the angle of rotation.

3 marks


Find the value of x+ y in the figure below.

3 marks


Show that if , then the points A, B and C are collinear.

3 marks


A tourist changes 1500 Euros to Kenya shillings at 1 Euro=Ksh 76.05. He spends Ksh. 79 389, then changes the remaining shillings back to Euro at Ksh.77.05. How many Euros does he receive to the nearest Euro?

3 marks


Determine the equation of a straight line which is parallel to the line -5x-2y-9=0 and passes through

3 marks


The numbers of sides of two regular polygons are in the ratio 3: 4. The sum of the interior angles of the two polygons are in the ratio 2: 3. Calculate the number of sides of the two polygons.

4 marks


In the figure below O is the centre of the circle. AO is parallel to BC and angle BOC =960

Calculate angle BCA

2 marks



4 marks


The figure below represents the plan of a plot land. Dimensions are in metres.

Calculate the area of the plot, correct to 2 decimal places, in hectares.

4 marks

SECTION II (50 Marks)

Answer only five questions in this section in the spaces provided.

A coffee plantation has four main boundaries WX, XY, YZ and WZ which are straight lines. X is 16km on a bearing of 0400 from W, Y is directly South of X and East of W. Z is 12km on a bearing of 1200 from Y.

a) Using a scale of 1cm to represent 2km, show the above information in a scale drawing. (3mks)
b) From the scale drawing, determine

i) The distance, in km, of W from Z. (2mks)
ii) The bearing of W from Z. (2mks)
c) A worker intends to move from point Z to X directly at a speed of 3m/s. Find the time he would take ( to the nearest minute). (3mks)

10 marks


c) From your graphs, find the values of x which satisfy the simultaneous equation. (1mk)

d) Write down the quadratic equation which is satisfied by the values of x where the two graphs intersect. (2mks)

10 marks


A particle moving at a velocity of 20m/s decelerates uniformly for 5 seconds to a velocity of 10m/s. It then moves at this velocity for the next 10 seconds. It accelerates uniformly in the next 15 seconds to a velocity of 30m/s before coming to rest in the next 20 seconds.

a) Draw a velocity – time graph to represent this information. (2mks)

b) Use your graph to determine

i) Deceleration in the first 5 seconds. (2mks)

ii) Acceleration between 15 seconds and 30 seconds. (2mks)

iii) Total distance covered. (2mks)

iv) Average speed for the whole journey. (2mks)

10 marks


The figure below represents a cross-section of a concrete prism whose length is 3m. AB= FE and AGF is a semi-circle.

a) Find the perimeter of the cross-section. (2mks)

b) Find the area of the cross-section. (2mks)

c) Hence or otherwise, calculate the total surface area of the prism. (2mks)

d) Determine the volume of the concrete used to make the prism. (2mks)

e) Given that 1cm3 of concrete weighs 6.8g, find the mass of the prism in kg. (2mks)

10 marks


The table below shows the distribution of marks scored in an exam by a class in a certain school.

a) State the modal frequency. (1mk)

b) Calculate the mean score for the class (5 marks)

c) Calculate the median score (4 marks)

d) Complete the histogram for the data.

10 marks


The figure below shows an open tank with cylindrical and frustrum parts.

a) Curved surface area of the frustrum (3mks)

b) Curved surface area of the cylindrical part. (2mks)

c) Surface area of the tank. (2mks)

d) Capacity of the tank in litres. (3mks)

10 marks


Two circles intersect as shown in the figure below.

a) Given that AP=AN, Calculate the size of angles APB and ABQ (4mks)
i. APB

ii. ABQ

b) Calculate the radius of each circle. (2mks)

c) Calculate the area of intersection. (4mks)

10 marks


The equation of a curve is given as

a) Find i) The y-intercept of the curve. (1mk)

ii) The x- intercepts of the curve. (2mks)

b) i) Find the stationary points of the curve. (3mks)

ii) Determine the nature of the stationary points. (2mks)

c) Hence sketch the curve. (2mks)

10 marks

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