Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

Look at the picture and find out which square is not linked with any of the other squares.

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

Which point will the car reach to go out?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Replace the question mark with the correct number in below Picture:

Buy me, smell me or deliver me, I do not change.

Who am I?