Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

I look at you, you look at me, I raise my right, you raise your left. What am I?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Solve the equation in the image by looking at the pattern closely.

What has 88 keys?

What has a bottom at the top?

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

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?