Number worksheet — GCSE Foundation

1.A cinema has 21 rows of seats with 29 seats in each row. Work out an estimate for the number of people the cinema can hold, by rounding each number to 1 significant figure.

2.Work out 250 ÷ 1000.

3.Work out (6 × 10⁷) + (3 × 10⁶). Give your answer in standard form.

4.A recipe states that a cake needs 200 g of flour, correct to the nearest 25 g. Work out the smallest possible mass of flour, in grams, that could actually be used.

5.Work out 3 1/5 + 1 2/3. Give your answer as a mixed number in its simplest form.

6.The number 24 can be written as 2³ × 3, and the number 60 can be written as 2² × 3 × 5. Work out the lowest common multiple of 24 and 60.

7.Write these numbers in order, starting with the smallest: 5, −8, 0, −3, 2

8.A rectangular tile measures 45 cm by 0.6 m. Work out its area, in square centimetres.

9.A fruit bowl contains apples, pears and plums in the ratio 3 : 4 : 5. What fraction of the fruit are not plums?

10.In a class, 1/3 of the pupils are girls. There are 12 girls in the class. Work out how many pupils are in the class.

11.Work out 36 ÷ (2 × 3)

12.Work out (−6) + (−4) × 3

13.Work out 20 − 8 ÷ 2 + 1

14.Light travels at 2.998 × 10⁸ metres per second. A distant object in space is 3.1 × 10¹⁵ metres from Earth. Work out an estimate for the number of seconds light takes to travel from the object to Earth, by rounding each number to 1 significant figure.

15.Which of these is equal to 5³?