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?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

Replace the question mark in the picture below.

It belongs to you, but other people use it more than you do. What is it?

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

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What has many keys but can’t open a single lock?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

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?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.