Number worksheet — GCSE Foundation

1.Write 90 as a product of its prime factors.

2.Round 3.947 to 2 decimal places.

3.Work out the highest common factor of 12 and 18.

4.The distance from the Earth to the Moon is 384,000 km. Write this distance in standard form, in kilometres.

5.Work out the lowest common multiple of 4 and 6.

6.A student always writes the digits after the decimal point over a denominator of 100, whatever the number of decimal places. Using this wrong rule, they convert 0.9 to a fraction. Work out the correct fraction that 0.9 is equal to, giving your answer in its simplest form.

7.Work out an estimate for 89 + 52, by rounding each number to the nearest 10.

8.A measuring jug shows a volume of 340 ml, correct to the nearest 20 ml. Work out the smallest possible volume in the jug.

9.Write 0.06 as a fraction in its simplest form.

10.Work out 15% of £40, using 10% and 5%.

11.Write 0.325 as a fraction in its simplest form.

12.Work out (5 + 2) × 3²

14.Grace works out 7 × 99 by writing 99 as 100 − 1. Use her method to work out 7 × 99.

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