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Here's a little brain teaser, for your coffee break:

$$ 62-63 = 1 $$

Move only one digit to make it right!

Have fun!

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closed as off topic by Henning Makholm, Grigory M, Rahul, Qiaochu Yuan Jan 27 '12 at 22:33

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I believe that following expression is unique solution to the riddle :

$2^6-63=1$

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(By request...)

If we can move one "character", then moving the horizontal line over gives $62 = 63 - 1$

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$6263 \neq 1$.

I moved one character not a digit :)

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