Divisibility Rules: Practice 1–13
Settings
Choose a level
Quick rules
1 Every whole number.
2 Last digit is even.
3 Digit sum is divisible by 3.
4 Final two digits are divisible by 4.
5 Ends in 0 or 5.
6 Passes both 2 and 3.
8 Final three digits are divisible by 8.
9 Digit sum is divisible by 9.
10 Ends in 0.
12 Passes both 3 and 4.
Optional extension
7 Subtract twice the final digit from the remaining number.
11 Use the alternating sum of the digits.
13 Add four times the final digit to the remaining number.