Quick Guide to Divisibility Rules

Front

Divisibility by 2

Back

Last digit is even

Front

Divisibility by 3

Back

Sum of digits divisible by 3

Front

Divisibility by 4

Back

Last two digits divisible by 4

Front

Divisibility by 5

Back

Last digit is 0 or 5

Front

Divisibility by 6

Back

Divisible by 2 and 3

Front

Divisibility by 7

Back

Double last digit, subtract, result divisible by 7

Front

Divisibility by 8

Back

Last three digits divisible by 8

Front

Divisibility by 9

Back

Sum of digits divisible by 9

Front

Divisibility by 10

Back

Last digit is 0

Front

Divisibility by 11

Back

Alternating sum of digits divisible by 11