why number 8549176320 is one of a kind?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

Find the next number in the sequence

5 12 24 36 ?

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Replace the question mark with the correct number.

Find the next number in the series below.

6 18 270 72090 ?

Can you tell a 3D object that has just two surfaces?