Math 9.7S Revision Solution

s e c t i o n ^hEssential Maths B o o k :

No calculators

x t i o 1 + (9f : : / t >1. () Find the sum of all the prime numbers between 1 and 20. (1 mark)

l X 'I. * ^(b) Write 84 as product of prime numbers.(c) Share 220 between three people in the ratio 2 : 3 : 5

4 *4 L L

(1 mark) (2 marks)

no2 . Solve the equations

4 * + 11 = 3 k x z " 8 (1 mark)___________________________________~ ^ ____________________ __________

3 / 1 - 10 X = 2 12 X (2 marks)

2 - X - ) ~2.

m g4. Find the angle X the diagram.

5. A 10Og box of cereal contains 25g of fruit and 75g of oats.(a) Write the ratio of fruit to oats in its simplest form. (1 mark)(b) Work out the weight of oats in a 240g box of the same cereal.I. (1 mark)

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>v i "a* *6. The triangle shown is isosceles.

Find the three possible values of X

7 f t l (3 marks)

7. Work out (a) ^i + 4 = t o (1 mark)(b) 3 2 8 : 3

'

- (1 mark)

5 }(c) 3 1 5 3 X - (2 marks)

8. Peter has to use brackets to find the answer to 3.148.2-5.123

Show how you could work this out on a calculator using bracket keys

Start like this(2 marks)

9. (a) Work out(i) (-4 ) X (9) (ii) 3 - ( - 1 1 )

h [0 I '(b) Copy and complete this magic square in which the

sum of the numbers in each, column, row and main diagonal is the same.

. (2 marks)

0 -1 H-1 " 3

-1 6 2(2 marks)

m19. The weights of the dogs at rescue centre are shown in the table.

() Calculate an estimate for the mean weightof the dogs. 1 y o b / 0 1 (3 marks)' -JO :: k ' t - H

(b) Explain why your answer is an estimate.

X (1 mark)'AC .

weight (kg)j frequency

0 - 2 h 4

2 - 4 6

'^Si001 98 - 1 2 jio 812 - 20 ^ 3

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20. Work out the square root of T5 of 8% of of (2.5 + 0.0005)

5- ' ^ 0 0 )

i l * 1/0 0A (3 marks)