Find the next number in the sequence

1, 2, 6, 21, 88, __?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

Can it be possible to build a house that has all its four walls facing towards the South?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

You see me once in June, twice in November, and not at all in May. What am I?

Who has married many women but was never married?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

What does below pictogram mean?

Which is the correct shadow of the bird?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.