Find the multiple of 21

Let's play "Find the multiple of 21!" This is how it works: There is one number in each of the boxes below, but only one of the numbers is a multiple of 21. Without using a calculator, see if you can find the only multiple of 21.

Find the multiple of 22
Did you like this game? Go here to try the next game on our list!

Find the Multiple
Do you want to play "Find the Multiple" for a particular number? If so, please enter it below and press "Play."

Multiples of 21
Do you know that there are more multiples of 21 than there are stars in the universe? Go here to learn all about the multiples of 21.