Divisibility Rules

Question 1

What is the rule for the number that’s divisible by 2?

Answer 1

Look at the last digit. If the last digit may be 0,2,4,6, or 8

Question 2

What is the rule for the number that is divisible by 3?

Answer 2

If the sum of the individual digits is a multiple of 3

Question 3

What is the rule for the number that is divisible by 4?

Answer 3

If the last two digits are a multiple of 4

Question 4

What is the rule for the number that is divisible by 5?

Answer 4

If the last digit is 5 or 0

Question 5

What is the rule for the number that is divisible by 6?

Answer 5

If it is both divisible by 2 and 3 (apply the rules for both)

Question 6

What is the rule for the number that is divisible by 9?

Answer 6

If the sum of the digits are a multiple of 9

Question 7

What is the rule for the number that is divisible by 10?

Answer 7

If the last digit is 0

Question 8

What is the rule for the number that is divisible by 11?

Answer 8

Subtract the last digit from the number formed by the remaining digits. If new number is divisible by 11, the original number is divisible by 11.

Question 9

What is the rule for the number that is divisible by 12?

Answer 9

If the number is divisible by 3 and 4