The number of zeroes in the square of 100 will be

• 2

• 3

• 4

The sum of first ‘n’ odd natural numbers is

• n² – 1

• n²

• n² + 1

The unit’s digit in (172)² will be

• 1

• 7

• 4

A Pythagorean triplet is given by:

• n, n² – 1 and n² + 1

• 2n, n² – 1 and n² + 1

• 2n, 2n² - 1 and 2n² + 1

If the number of digits of a perfect square is ‘n’ and n is ‘even’, then what is number of digits of its square root?

If the number of digits of a perfect square is ‘n’ and n is an odd number, then what-is the number of digits of its square root?