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?

If 21x = 79x, what is the value of x?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Can you find the hidden animal in the picture below?

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

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?