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

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What is the fastest way to double your money?

Can you divide the below-given shape into four equal and identical pieces?

What's the only room from which no one can enter or leave

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

How many times do a clock's hands overlap in a day ?

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