I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

Do you know who was buried in John's tomb?

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.

What has a bottom at the top?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

How can a man go eight days without sleep?