Which of following can never be ending of a perfect square?

How many pairs of natural numbers is there the difference of whose squares are 45.

The divisor is 25 times of the quotient and 5 times the remainder. If the quotient is 16, the dividend is-

The HCF and LCM of two numbers are 44 and 264 respectively. If the first number is divided by 2, the quotient is 44. The…

The sum of first five prime numbers is:

On multiplying a number by 7 all the digit in the product appear as 3's , the smallest such numbers is -

If x : y be the ratio of two whole numbers and z be their HCF, then the LCM of those two numbers is:

If a and b are two distinct natural numbers, which one of the following is true ?