Why do people go to bed?

How many letters are in the alphabet?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Replace the question mark with the correct number in below Picture:

Who has married many women but was never married?

Which number should replace the question mark?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

What's the best place to go shopping in the ocean?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?