Number worksheet — GCSE Foundation

1.Work out an estimate for 6.4 × 3.9, by rounding each number to the nearest whole number.

2.After a price increase of 10%, a laptop costs £330. Work out the original price.

3.Work out (5 + 2) × 3²

4.A tap fills a 20 litre bucket in 2 minutes 30 seconds. Work out the rate of flow, in litres per minute.

5.A number, n, is a multiple of both 6 and 9. Work out the smallest possible value of n that is greater than 20.

6.Work out how many factors 36 has.

7.The number of pages in a book is 240, correct to the nearest 10 pages. Write down the error interval for the actual number of pages, n.

8.A concert hall has 300 seats. 20% of the seats are in the balcony. Work out how many of the seats are in the balcony.

9.Work out 2 × (−3 + 7)

10.Work out the lowest common multiple of 9 and 15.

11.A shop assistant says that 7.2 × 3.9 = 56.16. Work out an estimate for 7.2 × 3.9, by rounding each number to the nearest whole number, to show that the assistant’s answer cannot be correct.

12.At midday the temperature in the Lake District was 3 °C. By midnight it had fallen to −6 °C. Work out the fall in temperature.

13.A gardener has 42 tulip bulbs and 56 daffodil bulbs. She plants them in rows, with every row containing the same number of tulip bulbs and the same number of daffodil bulbs, and no bulbs left over. Work out the greatest number of rows she can plant.

14.Last year a company made a profit of £5,200,000. Write this amount in standard form.

15.A length, L cm, has the error interval 24.5 ≤ L < 25.5. Write down the degree of accuracy to which the length was measured.