Before Mount Everest was discovered, what was the highest mountain in the world?

How can you take 2 from 5 and leave 4?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

A generous owner of a company decided to give a bonus of $45 to every man and $60 to every woman on his birthday. But only one-ninth of the men and one-twelfth of the women were present to take the bonus.

Can you calculate the amount of money the owner spent if there were 3552 employees?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Find the last number in the series below:

voN luJ yaM raM ---

There is a place where if I stand up straight, I will still be considered sideways.

What does below rebus means ?

If eleven plus two equals one, what does nine plus five equal?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?