text: # Mathematical tricks to square numbers
  
  #### by satheeshkumar 2012-07-11 17:27:36
  
  If you need to square a 2 digit number ending in 5, you can do so very easily with this trick. Mulitply the first digit by itself + 1, and put 25 on the end. That is all!
  
  for eg.
  
  25^2 = (2x(2+1)) & 25
  
  2 x 3 = 6
  
  625
  
  So you can square easily any number ending with 5..
  
  545
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