What does this Rebus Picture means ?

Solve the puzzle by telling what does below picture means.

What work can one never finish?

How can you make a TV, a bed, a dog, and a car liquid?

What is at the end of a rainbow?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

How many triangles can you find in this given picture?

Replace the question mark with the correct number in below Picture: