The least number that should be added to 2,397 so that the sum is exactly divisible by 3, 4, 5 and 6 ?

Two numbers, of which the first number is 200% of the second number. If the sum of the squares of the first number and the cube of the second number is 5 times the product of both numbers, find the difference between the two numbers?

What will be come in place of question mark(?) in the following number series?
8,  14, 25, 46, 82 , ?

In a class, there are ' z ' students. Out of them ‘x’ are boys. What part of the class is composed of girls? 

Find the maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils.

The sum of the digits of a two digit number is 15. When 9 is subtracted from the given number then its digits interchanged. What will be the required original number?

On dividing a certain number by 342 we get 47 as remainder. If the same number is divided by 18, what will be the remainder?

For what value of ‘y’, $$ {x^{2}+{1\over12}{x}+y^{2}}$$ is perfect square?