If we divide the unknown two-digit number by the number consisting of the same digits written in the reverse order, we g…

The square of a number greater than 1000 that is not divisible by three, when divided by three, leaves a remainder of

In a 4-digit number, the sum of the first two digits is equal to that of last two digits. The sum of the first and last …

The sum of even numbers between 1 and 31 is:

A number is doubled and 9 is added, If the resultant is tripled, it becomes 75. What is the number ?

The unit digit of (316)<sup>3<sup>4n</sup></sup> + 1 is :

Which one of the following is a prime number ?

Which of the following is a prime number ?