Complete the table series riddle by finding the number that can replace "??".

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What is the word or phrase?

I don't get anymore wetter, no matter how much rain falls on me.

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

Decode this picture on T-Shirt and tell what it says ?