Any number is said to be divisible by 15 if that number is divisible by 3 as well as 5 (remember, 15 can be written as 3 x 5). If the number is not divisible by either of 3 or 5, then the number is not divisible by 15.

To check divisibility by 3, please refer to topic Divisibility by 3.

To check divisibility by 5, please refer to topic Divisibility by 5.

For example: Is 34545 divisible by 15?

Step 1: Sum of digits of 34545 is (3+4+5+4+5=) 21.

As 21 is divisible by 3, so number 34545 is divisible by 3.

Step 2: As last digit of 34545 is 5, so 34545 is divisible by 5.

As 34545 is divisible by 3 and 5, both, so this number is divisible by 15.

Practice Questions:

Check whether below numbers are divisible by 15?

a. 45660 b. 12365 c. 1111120 d. 2222245 e. 221245

f. 2455 g. 36360 h. 1245785 i. 2840 j. 555655

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