Grade 4 Math — 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) 4653
- d) 4652
2.What is the largest factor of 45, apart from 45 itself?
3.What is the fourth number in the seven times table?
4.Which of these numbers is prime?
- a) 49
- b) 39
- c) 29
- d) 91
5.Put these numbers in order by how many factors they have, fewest first.
- 13
- 9
- 16
- 12
- 8
6.Which number between 20 and 30 is a multiple of 9?
7.Which of these numbers is composite?
- a) 59
- b) 61
- c) 51
- d) 53
8.What is the smallest prime number?
Answer key — Grade 4 Math — Factors and multiples
- 1. c) 4653
- 2. 15
- 3. 28
- 4. c) 29
- 5. 1. 13 2. 9 3. 8 4. 16 5. 12
- 6. 27
- 7. c) 51
- 8. 2