Divisibility Rules and Basic Arithmetic

It must be divisible by 5 and 10.

It must be divisible by 2 and 6.

It must be divisible by 3 and 4.

It must be divisible by 7 and 8.

Check if the last digit is 0 or 5.

Check if the number is a multiple of 10.

Sum the digits and see if the sum is divisible by 3.

Check if the number is even.

Check if the number ends in 0.

Check if the last two digits form a number divisible by 4.

Check if the number is a multiple of 5.

Check if the number is even.

20

16

22

18

No, because it is not a multiple of 5.

Yes, because it is an even number.

Yes, because the sum of its digits is divisible by 3.

No, because the sum of its digits is not divisible by 3.

11

12

10

13

5

6

7

8

Yes, because the sum of its digits is divisible by 3.

No, because the sum of its digits is not divisible by 3.

No, because it is not a multiple of 5.

Yes, because it is an even number.

9

11

8

10

No, because it is not divisible by 5.

Yes, because it is a multiple of 10.

No, because it is not divisible by 3.

Yes, because it is divisible by both 3 and 4.