If n is an integer, then (n<sup>3</sup> - n) is always divisible by :

If n is a whole number greater then 1, then n<sup>2</sup> (n<sup>2</sup> - 1) is always divisi…

The difference between three times and seven times of a number comes to 36. What is the number?

A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 sec…

Which of the following is a prime number ?

Largest fraction among $$\frac{2}{5},$$ $$\frac{5}{6},$$ $$\frac{{11}}{{15}}$$ and $$\frac{7}{8}$$ is :

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 …

If a and b are odd numbers, then which of the following is even ?