Find the multiple of 20

Let's play "Find the multiple of 20!" 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 20. Without using a calculator, see if you can find the only multiple of 20.

Find the multiple of 21
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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 20
Do you know that there are more multiples of 20 than there are stars in the universe? Go here to learn all about the multiples of 20.