What do you see in the given picture?

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?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Take one out and scratch my head, I am now black but once was red. What am I?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

People put me on the table and cut me but do not eat me. What am I?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Which city is three-fifths chick two third cat and 50% goat?