What does the below image rebus riddle means ?

I have feet, but no legs. Which animal Am I?

How can you leave a room with two legs and return with six legs?

Out of four images which one is the odd one out?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Replace the question mark with the correct number.

Imagine you are in a room with no windows or doors. How will you get out?