A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

Can you solve below mathematical equation?

2^1234 - 2^1233

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

Find the next number in the following series:
6, 14, 26, 98, __?

What demands an answer, but asks no questions