One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Why is the Hole below a Lock?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Forwards I am heavy, backward I am not. What am I?