Is 21 Divisible By 11?

If you divide 21 by 11 and the quotient is a whole number without a remainder, then 21 is divisible by 11. To find out if 21 is divisible by 11 you could therefore simply enter 21 divided by 11 into your calculator to see if you get a remainder - however, we will show you a better method to determine if 21 is divisible by 11 without a calculator.

To find out if any number such as 21 is divisible by 11, you split 21 into individual digits and then alternate subtracting and adding the digits. If the absolute value of the result is divisible by 11, then 21 is divisible by 11. Here is the math:

2 - 1 = 1
|1| = 1

1 is not divisible by 11, therefore the answer to "Is 21 divisible by 11?" is No.

Divisible by 11
Please enter another number below to see if it is divisible by 11.

Is 22 divisible by 11?
Here is a similar problem we have explained and answered using the same technique we used above.