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studiot

The useless facts thread.

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These are not palindromes but still useless but interesting

 

122   =   144

reverse the digits

212   =  441

 

and

 

132   =  169

reverse the digits

312   =   961

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Although it's not that useless...

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32 minutes ago, joigus said:

Although it's not that useless...

Oh  ??

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7 minutes ago, studiot said:

Oh  ??

Calculation shortcuts and mnemonics.

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2 minutes ago, joigus said:

Calculation shortcuts and mnemonics.

Thank you I will (try to) remember that next time I want 13 squared or 12 squared.

They are 31 squared and 21 squared reversed.

+1

:)

Edited by studiot

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