Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

You can see it everyday, But cannot touch it at will. What is it?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Why is a river so rich ?

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

Look at the picture and find out which square is not linked with any of the other squares.

What English word has three consecutive double letters?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?