Practice Exam Paper

ANSWERS

1. The distance between two points on a map is 5 cm correct to the nearest centimetre.
(a) Write down the (i) least upper bound of the measurement (ii) greatest lower bound of the measurement.
(b) The scale of the map is 1 to 20 000. Work out the actual distance in real life (in kilometres) between the upper and lower bounds.

(4 marks) 

2. Triangle ABC is isosceles. AB = AC = 12cm . Angle ABC is 55 degrees. Calculate the area of the triangle correct to 3 significant figures. 

(6 marks)

3. Solve the equations:
(i) 4y² - 81 = 0
(ii)     1     +  1  =  -1
     (x + 2)      3


(6 marks)

4. There are 8 eggs. Two of the eggs have passed their sell by date and are 'bad'. 3 eggs are selected at random.

(a) Complete the probability tree diagram. 

(b) Work out the probability that 3 'good' eggs will be selected.
(c) Work out the probability that at least one 'bad' egg will be selected.

(9 marks)

5. (a) Solve the inequality 7x + 3 > 17 + 5x
(b) Simplify the following.
(i) 2x³ × 6x²
(ii) (3y³)²
(c) Multiply out and simplify (2x - 1)(x - 3)

(6 marks)

6.
(a) Write down the nth term of the sequence 2, 5, 8, 11, ... .
(b) Write down the nth term of the sequence 2, 5, 10, 17, ... .

(4 marks)

7. Twenty five people took a test. The points scored are grouped in the frequency table below.

(a) Work out an estimate for the mean number of points scored. 

(b) Complete the table below to show the cumulative frequency for this data.
(c) Draw a cumulative frequency graph for this data.
(d) Use your graph to find an estimate for the median of this data. 

(9 marks)

8. 

AB : AC = 1 : 3
(i) Work out the length of CD.
(ii) Work out the length of BC.

(4 marks)

9. Matthew and Nicola divide £94.50 in the ratio 11 : 4. How much does each of them receive?

(3 marks)  

10. (a) Ö12 can be written in the form aÖb where a and b are prime numbers. Calculate the values of a and b.
(b) B = Ö12 + Ö3 . Without using your calculator show that B² = 27.

(4 marks) 

11. The temperature from a factory furnace varies inversely as the square of the distance from the furnace.
The temperature 2 metres from the furnace is 50 degrees Celsius.
Calculate the temperature 3.5 metres from the furnace. Give your answer to 2 decimal places.

(5 marks)

12. A planet is 81 900 000 000 000 km from the Earth.
(a) Write 81 900 000 000 000 in standard form.

Light travels 3 × 10⁵ km in 1 second.
(b) Calculate the number of seconds that light takes to travel from the planet to the Earth. Give your answer in standard form correct to 2 significant figures.
(c) Convert your answer to part (b) to days. Give your answer as an ordinary number.

(7 marks)

13. Triangle ABC and vectors a and b are shown on the grid. 

(a) Draw the position of the triangle ABC after translation by the vector b - 2a.
(b) (i) Write the vector AB in terms of a and b.
(ii) Write the vector BC in terms of a and b.

(c) D is an unmarked point on the grid. BD = 2/3 BC. AD = xa + yb . Use your answers to (b) to calculate the values of x and y. You must show all your working.

(7 marks)

14. A company makes compact discs (CDs).
The total cost, P pounds, of making n compact discs is given by the formula P = a + bn , where a and b are constants.
The cost of making 1000 compact discs is £58 000.
The cost of making 2000 compact discs is £64 000.

Calculate the values of a and b.

(4 marks)

ANSWERS

(c) Matthew Pinkney 2003