Is 21 divisible by 6?

The question we are solving here is: If we divide 21 by 6, will we get a whole number with no remainder? In other words, is 21 divisible by 6?

For 21 to be divisible by 6, both of the following two criteria must be met: First, 21 has to be an even number and second, the sum of its digits must be divisible by 3.

Looking at 21, you see that 21 is an odd number, which means that the first criteria is not met.

The sum of the digits in 21 is 3, which is divisible by 3. Therefore, the second criteria is met.

Thus, 21 is not divisible by 6 and the answer to the question "Is 21 divisible by 6?" is

NO

You may also be interested to know that if you divide 21 by 6, you get 3.50.

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