Question

What will be num of zeros in the square of 100

Answer 1

Given : square of 100

To Find :  numbers of zeros

Solution:

Any number having unit digit 0 has square also ending with zero

If a number has n zeroes at the end

Then square of the number has 2n zeroes at the end

100  ahs 2 zeroes at the end

Hence number of zeroes in the square of hundred at the end will be 2 * 2 = 4

100² = 100 * 100  = 10000

4 zeroes is the correct answer

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