Divisibility Rules
Maths: KS3, topic 1.8.1
Divisibility Rules
Learn how to check whether a number is divisible by 2, 3, 5 or 10.
Divisible by 2
A number is divisible by 2 if its last digit is even
- It must end in 0, 2, 4, 6 or 8
For example, 246 is divisible by 2
Divisible by 3
Add the digits
- If the digit sum is divisible by 3, the number is divisible by 3
For example, 234 is divisible by 3 because 2 + 3 + 4 = 9
Divisible by 5
A number is divisible by 5 if its last digit is 0 or 5
For example, 135 is divisible by 5
Divisible by 10
A number is divisible by 10 if its last digit is 0
For example, 120 is divisible by 10