What does this rebus puzzle means ?

What do you think with the below Picture ?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

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 is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

The centre of the third figure is empty. What digit should fit inside?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?