10:06
Wednesday, 30 May 2012
Thursday, 24 May 2012
10:42
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Maths, squaring trick
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Suppose the Number is 25
we have to squrare it
we take the tens digit ie 2 and multiply it by number, 1 more than it
2*(2+1)=2*3=6
and the square of 5 is 25
so the square of 25 is = 6/25=625
Similarly
square of 65 is 6*(6+1)/25=6*7/25=4225
practice it to be perfect
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