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You start with a number. Double it. Square the answer. You get 400. What number did you start with?
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You start with a number. Double it. Square the answer. You get 400. What number did you start with?

User BryceH
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1 Answer

3 votes
10x2 = 20
20^2 = 400
So the answer is 10
User Borowis
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