Replace the question mark with the correct number.

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?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

What does below Rebus say?

XLR8

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Why is the Hole below a Lock?

There was a strange boy who was born before his father. How can this be possible?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?