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Unit's Place '5' Square Trick

ssparikshya

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2 May 2011
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Friends, today i gonna show you a trick by which you can find the sqaure of a number with 5 in unit's place in 10 to 15 secs
now lets get started ......

Example Number- 105

1] find the sqaure of 5; which is 25

now you got last 2 digits of your answer..

2] then add one to the no. formed by rest digits ; in this case 10 +1 = 11


3] then mutiply the result of the addition by the no . formed by rest digits; in this case 10 x 11 = 110

now you got you missing digits in answer

so, the answer is 11025 :)


Source: My Expirment
 
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