Divisibility
Practise rules for 2, 3, 4, 5, 6, 8, 9, and 10, plus divisors, multiples, and digit sums.
How to solve this
- For 2, 5, and 10, the last digit is enough: 245 is divisible by 5 because it ends in 5.
- For 3 and 9, add the digits: 738 has digit sum 18, so it is divisible by both 3 and 9.
- A divisor divides exactly; a multiple is the result of multiplying. Since 24 = 6 × 4, 6 is a divisor and 24 is a multiple of 6.
Examples
Is 245 divisible by 5?
yes
Digit sum of 738
18
Divisors of 24
1, 2, 3, 4, 6, 8, 12, 24
Practice problems with answers
Solve these problems on paper or out loud, then check the answer key. The online practice and the printable worksheet give a new set every time.
- 8 : 4 = ___
- 66 : 6 = ___
- Divisors of 84: ___
- Digit sum 407 = ___
- 15 : 3 = ___
- Digit sum 774 = ___
- Divisors of 72: ___
- 66 : 11 = ___
Show answers
- 2
- 11
- 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
- 11
- 5
- 18
- 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
- 6