Can you find out the missing number in the grid?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Count the number of triangles in the below picture?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

What has many teeth, but cannot bite?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?