The useless facts thread.

[studiot]

These are not palindromes but still useless but interesting

 

12²   =   144

reverse the digits

21²   =  441

 

and

 

13²   =  169

reverse the digits

31²   =   961

[joigus]

Nice.

[joigus]

Although it's not that useless...

[studiot]

  On 9/9/2020 at 11:11 AM, joigus said:

Although it's not that useless...

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Oh  ??

[joigus]

  On 9/9/2020 at 11:44 AM, studiot said:

Oh  ??

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Calculation shortcuts and mnemonics.

[studiot]

  On 9/9/2020 at 11:51 AM, joigus said:

Calculation shortcuts and mnemonics.

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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 September 9, 2020 by studiot

[joigus]

  On 9/2/2020 at 3:58 PM, Airbrush said:

Salvador Dali was famous for saying "I know what I eat, but I don't know what I do."

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Another Dali factoid: He doodled on the cheques so they would never be cashed:

https://theuijunkie.com/salvador-dali-cheque-restaurants/

[Salik Imran]

Hello! Here are some useless facts for you: rubber bands that are refrigerated last longer, playing dance music can help ward off mosquitoes, and peanuts are one of the ingredients of dynamite!

Provided by myself from (url deleted; violation of rule 2.7)