10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

Can you count the number of lines in the below picture?

Find the next number in the sequence

5 12 24 36 ?

The dirtier I get, the whiter I look. Who am I?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

What goes up but never comes down?

How many triangles are there on the puzzle below?