Free Study Material For RRB Examination
Subject : Mathematics (Square Root & Cube Root)
The square root of a number is that number the product of
which itself gives the given number, ie, the square root of 400 is 20, the
square root of 625 is 25.
Thus from the above example it is clear that in order to find the complete
square root of a given number every prime factor of that number should be
repeated twice. Thus, we can make a number which is not a perfect square, a
perfect square by multiplying or dividing the number by those factors of it
which are not contained in pairs.