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

what one word does the below rebus identifies?

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?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

Can you find the mistake in the below statement?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?