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 think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

If 1+9+8=1, what is 2+8+9?

Find the next number in the series.
1 10 24 43 67 ?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

The more it dries, the wetter it becomes. Can you tell what it is?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?