What does the below rebus riddle means?

What is harder to catch the faster you run?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Why do Chinese men eat more rice than Japanese men do ?

What runs around the whole yard without moving?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What is full of holes but still holds water?