Finding Square Root of Perfect Squares in 3 Seconds

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This video basically illustrates a method so as to find the square root of perfect squares less than 100.

The strategy explained will enable you to find the square root of numbers in mere seconds.

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Very good trick :)
Thank you
I have one question -- IF SOMETHING is not a perfect square and we apply this method, then this method doesn't work..so how do we know whether the number is perfect square ..can you please clarify my doubt ??

shivamkhurana
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What if I need to find the Square Root of a number that has more than 4-digits? Eg. 11250? or even 4830915?

mahnazchowdhury
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if someone asks me suddenly to tell square root of a number then how would I know that if the number is a perfect square or not?

davesachin