There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What runs around the whole yard without moving?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Why do people go to bed?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?