# A number puzzle

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I completely stole this from iGoogle brainteasers.

Move one number to make this equation correct:

101-102=1

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can I move the first '1', and lay it diagonally across the equals sign?

like this:

$01-102{\neq}1$

sort of

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101-102=1

(i.e. 101-10^2=1)

101-102=1

102-102=0

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101=102-1

But that's not moving a number; was the original question set out with matches, toothpicks or some such?

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No, it was just numbers, and brabos got it right. It's supposed to be 101-10^2=1. I do like Dak's idea, though.

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• 3 weeks later...

i was gonna change 101-102=1 into 102-101=1. he said move one number, not one digit. last time i checked, 102 is a number.

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But that's moving a number and a sign, not just a number, and would be quite similar to John's post (#5).

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how did i move a sign??????

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You moved the negative sign from 102 to the 101.

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