I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

A sundial has the fewest moving parts of any timepiece. Which has the most?

What does this rebus riddle means ?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Who is that with a neck and no head, two arms and no hands? What is it?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?