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..

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