Which is the rope you never skip with?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Find the next number in the series below.

6 18 270 72090 ?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

If eleven plus two equals one, what does nine plus five equal?

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

When we see 2 but call 10?

The centre of the third figure is empty. What digit should fit inside?