How can we find the square root of a number without using a calculator. ( example:- 676=?)

Hi Mohit!
 
One method is to calculate the square root of a number is by performing prime factorisation of the number.
To find the square root 676 first of all the prime factorisation of this number is done. This can be done as:
 
 
Thus, the square root of 676 is 26
 
Cheers!

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