How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

I cannot talk, but I always reply when spoken to. What am I?

The Little ant seems to be always confused. Do you know why?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Solve below rebus puzzle?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

When is the top of a mountain similar to a savings account?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?