Year 7 Maths — Factors and multiples

Find factors and multiples, use divisibility tests, and tell a prime number from a composite one.

Name: ________________________

Before you start

Every mark on this line is a multiple of 3. Move along them and see how many you already know from the 3 times table.

The line could carry on for ever, because a number has no last multiple. Factors go the other way: 36 has exactly nine of them and then they run out.

1.Which of these numbers is divisible by 9?
- a) 4651
- b) 4650
- c) 4652
- d) 4653
2.Put these numbers in order by how many factors they have, fewest first.
- 12
- 13
- 9
- 8
- 16
3.Which number between 20 and 30 is a multiple of 9?
4.Match each number to how many factors it has.
- 7
- 8
- 16
- 12
- 36
- 2
- 6
- 9
- 5
- 4
5.Which of these numbers is composite?
- a) 53
- b) 59
- c) 51
- d) 61
6.How many prime numbers are there between 10 and 20?
7.How many factors does 12 have?
8.Which of these numbers is prime?
- a) 39
- b) 49
- c) 29
- d) 91