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If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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.

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

There are forty elephants and they have forty-fore heads. How can this be possible?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What can you catch but never throw?

Find the number of squares in the below-given picture.

Who has married many women but was never married?