The LCM of two number is 45 times their HCF. If one of the numbers is 125 and the sum of HCF and LCM is 1150, the other …

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

The rightmost non-zero digit of the number 30<sup>2720</sup> is

The number of two digit prime numbers which remain prime even inverting the position of its digits is:

How many number between 1000 and 5000 are exactly divisible by 225 ?

The highest power of 17 which can divide exactly the following:<br /> (18<sup>2</sup> - 1) (18<sup&…

The remainder when 3<sup>0</sup> + 3<sup>1</sup> + 3<sup>2</sup> + 3<sup>3<…

Find the remainder when 4<sup>96</sup> is divided by 6.