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Divisibility Rules
Number | Rule |
---|---|
ONE | All numbers are divisible by 1. |
TWO | If a number is EVEN it is divisible by 2! |
THREE | If the sum of the numbers digits are divisible by 3 the number itself is divisible by three! |
FOUR | If the LAST TWO DIGITS are divisible by 4 the whole number. |
FIVE | If the last digit is ZERO or FIVE it is divisible by 5. |
SIX | If the number is divisible by 2 OR 3 it is divisible by six. |
Nine | If the SUM of the numbers digits are divisible by 9 the number itself is divisible by 9. |
Ten | If the last digit is Zero it is divisible by 10. |
PRIME | A number is considered PRIME if it is only divisible by itself and one. |