What does the below rebus riddle means?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

I make two people out of one. What am I?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

What brings you down but never up?

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

Can you find the thief by just looking at the picture below?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

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