SECTION 1 ( 50 MARKS)

Answer all the questions in this section

  1. Without using mathematical tables or a calculator evaluate ( 4 marks)

 

3    675 x 135

2025

 

  1. All prime numbers less than ten are arranged in descending order to form a

Number.

(a) Write down the number formed                                                    ( 1 mark)

(b) State the total value of the second digit in the number formed in (a) above

( 1 mark)

  1. Simplify

P2 + 2pq + q2

P3 – pq2 + p2q – q3                                                                               (  4 marks)

 

  1. In the figure below, ABCDE is a regular pentagon and ABF is an equilateral triangle                                                                         ( 1mark)

 

 

 

 

 

Find the size of

  1. Ð ADE ( 1 mark)
  2. Ð AEF ( 1 mark)
  3. Ð DAF ( 1 mark)

 

  1. Solve the inequality 3 – 2x Ð x ≤ 2x + 5 and show the solution  on the  number line

 

  1. The length of a rectangle is (3x + 1) cm, its width is 3 cm shorter than its length. Given that the area of the rectangle is 28cm2, find its length.

 

  1. In this question, mathematical table should not be used

A Kenyan bank buys and sells foreign currencies as shown below

Buying                                    Selling

(In Kenya shillings)                 In Kenya Shillings

1 Hong Kong dollar                      9.74                                         9.77

1 South African rand                    12.03                                       12.11

A tourists arrived in Kenya with 105 000 Hong Kong dollars and changed the whole amount to Kenyan shillings. While in Kenya, she pent Kshs 403 897 and changed the balance to South African rand before leaving for South Africa. Calculate the amount, in South African rand that she received.

(3 marks)

  1. In this question use a pair of compasses and a ruler only
    • construct triangle ABC such that AB = 6 cm, BC = 8cm and ÐABC 1350

(2 marks)

  • Construct the height  of triangle ABC  in a) above taking BC as the  base

(1 mark)

  1. A line with gradient of -3 passes through the points (3. k) and (k.8). Find the value of k and hence express the equation of the line in the form a ax + ab = c, where a, b, and c are constants.

 

  1. Without using mathematical tables or a calculator evaluate

6 log2 3 Ö 64 + 10 log3 5 Ö 243                                                     ( 3 marks)

 

  1. The diagram below represents a school gate with double shutters. The shutters are such opened through an angle of 630.

The edges of the gate, PQ and RS are each 1.8 m

 

 

 

 

 

 

 

 

Calculate the shortest distance QS, correct to 4 significant figures ( 3 marks)

 

  1. Two points P and Q have coordinates ( -2 ,3) and (1,3) respectively. A translation map point P to P’ ( 10, 10)
    • Find the coordinates of Q’  the image of Q under the translation ( 1 mark)
    • The position vector of P and Q in (a) above are p and q respectively given that mp – nq = -12

9                                                                   ( 3 marks)

Find  the value of m and n

 

  1. The diagram below represents a right pyramid on a square base of side 3 cm. The slant of the pyramid is 4 cm.

 

 

 

 

 

 

(a) Draw a net of the pyramid                                                ( 2 marks)

(b)        On the net drawn, measure the height of a triangular face from the top of

the Pyramid                                                                             ( 1 mark)

 

  1. Hadija and Kagendo bought the same types of pens and exercise books from the same shop

Hadija bought 2 pens and 3 exercise books for Kshs 78. Kagendo bought pens and 4 exercise books for Kshs 108

Calculate the cost of each item                                               ( 3 marks)

 

  1. The histogram below represents the distribution of marks obtained in a test.

The bar marked A has a height of 3.2 units and a width of 5 units. The bar marked B has a height of 1.2 units and a width of 10 units

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If the frequency of the class represented by bar B is 6, determine the frequency of the class represented by bar A.

 

  1. A circle centre O, ha the equation  x2 + y2 = 4

The area of the circle in the first quadrant is divided into 5 vertical strips of width 0.4 cm

(a) Use the equation of the circle to complete the table below for values of y correct to 2 decimal places                                                        ( 1 mark)

 

X 0 0.4 0.8 1.2 1.6 2.0
Y 2.00 1.60 0

 

(b) Use the trapezium rule to estimate the area of the circle               ( 3 marks)

 

 

SECTION II (50 MARKS)

Answer any five questions in this section)

 

  1. In the year 2001, the price  of a sofa set  in a  shop was Kshs 12,000

(a)        Calculate the amount of money received from the sales of 240  sofa  sets that year                                                                         ( 2 marks)

 

(b) (i)   In the year 2002 the price of each sofa set increased by 25%  while the

number of  sets  sold decreased by 10%

Calculate the percentage increase in the amount  received from the sales

( 3 marks)

(ii)        If at the end of year 2002, the price of each sofa set changed in the ration 16:15, calculate the price of each sofa set in the year 2003            ( 1 mark)

 

(c) The number of sofa sets sold in the year 2003 was P% less than the number sold in the year 200. Calculate the value of P, given that the amounts received from sales if the two years were equal.                                          ( 4 marks)

 

  1. on the Cartesian plane below, triangle PQR has vertices P(2, 3), Q ( 1,2)  and  R ( 4,1)  while triangles P” q “  R” has vertices P” (-2, 3), Q” ( -1,2) and R” ( -4, 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  • Describe fully a single transformation which maps triangle PQR onto triangle P”Q”R”                                                                  ( 2 marks)
  • On the same plane, draw triangle P’Q’R’, the image of triangle PQR, under reflection in line y = -x ( 2 marks)
  • Describe fully a single transformation which maps triangle P’Q’R’ onto triangle P”Q”R                                                             ( 2 marks)
  • Draw triangle P”Q”R” such that  it can be mapped onto triangle PQR by a positive quarter turn about ( 0,0)                                              ( 2 marks)
  • State all pairs of triangle that are oppositely congruent         ( 2 marks)
  1. The diagram below ( not drawn to scale) represents the cross- section of a solid prism of height 8.0 cm                                                 ( 3 marks)

 

 

 

 

 

 

(a) Calculate the volume of the prism                                                 ( 3 marks)

(b) Given that the density of the prism is 5.75g/cm3, calculate its mass in grams                                                                                                                        ( 2 marks)

(c) A second prism is  similar to first  one but is  made of a different materials. The volume of the second  is 246.24cm3

(i) calculate the area of the cross section of the second prism            ( 3  marks)

(ii) Given that the ratio  of the mass of the  first  to that of the second  is 2: 5 and the density  of the second prism                                                   ( 2 marks)

 

  1. A bus left Mombasa and traveled towards Nairobi at an average speed of 60km/hr. after 21/2 hours; a car left Mombasa and traveled along the same road at an average speed of 100km/ hr. If the distance  between Mombasa and Nairobi is 500km, Determine

(a) (i) The distance of the  bus  from Nairobi when the car took off  ( 2 marks)

 

(ii) The distance  the car  traveled  to catch up with the bus

 

(b) Immediately the car caught up with the bus, the car stopped for 25 minutes. Find the new average speed  at which the car traveled in order to reach  Nairobi at the same time as the bus.                                                                   ( 4 marks)

 

  1. The figure below represents a quadrilateral piece of land ABCD divided into three triangular plots The lengths BE  and CD are  100m and 80m respectively. Angle ABE  = 300 ÐACE = 450 and Ð ACD = 1000

 

 

 

Find to four significant figures:

(i) The length of AE                                                                            ( 2 marks)

(ii) The length  of AD                                                                         ( 3 marks)

(iii) the perimeter of the  piece of land                                               ( 3 marks)

(b) The plots are to be fenced with five strands of barbed wire leaving an entrance of 2.8 m wide to each plot. The type of barbed wire to be  used is sold  in  rolls of lengths 480m.

Calculate the number of rolls of barbed wire that must be bought to complete the fencing of the plots                                                                        ( 2 marks)

 

  1. In the diagram below, the coordinates of points A and B are ( 1,6) and (15,6) respectively)

Point N is on OB such that 3 ON = 2OB. Line OA is produced to L such that OL = 3 OA

 

 

 

 

 

 

 

 

 

 

 

  • Find vector  LN                                                                     ( 3 marks)
  • Given that a  point M is on LN  such that LM: MN = 3: 4, find the  coordinates of M                                                                   ( 2 marks)
  • If line OM is produced to T such that OM: MT  = 6:1

(i) Find the position vector of T                                                    (1 mark)

(ii) Show that points L, T and B are collinear                               (4 marks)

 

  1. The figure below is a model representing a storage container. The model whose total height is 15cm is made up of a conical top, a hemispherical bottom and the middle part is cylindrical. The radius of the base of the cone and that of the hemisphere are each 3cm. The height of the cylindrical part is 8cm.

 

 

 

 

 

 

 

 

 

 

 

 

(a) Calculate the external surface area of the model                           ( 4 marks)

(b) The actual storage container has a total height of 6 metres. The outside  of the    actual storage container is to be painted. Calculate the amount of paint required if an area of 20m2 requires 0.75 litres of the paint                              ( 6 marks)

  1. A particle moves  along straight line such that its displacement S metres from a given point is S = t3 – 5t2 + 4 where t is time in seconds

Find

  • the displacement of particle at t  = 5                                     ( 2 marks)
  • the velocity of the particle  when t = 5                                  ( 3 marks)
  • the values of t when the particle is momentarily at rest ( 3 marks)
  • The acceleration of the particle when t = 2                            ( 2  marks)