Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What does does this rebus picture means ?

You have two jars of chocolates labelled as P and Q. If you move one chocolate from P to Q, the number of chocolates on B will become twice the number of chocolates in A. If you move one chocolate from Q to P, the number of chocolates in both the jars will become equal.

Can you find out how many chocolates are there in P and Q respectively?

There are forty elephants and they have forty-fore heads. How can this be possible?

What have one eye but still cannot see?

I am white when I am dirty, and black when I am clean. What am I?

What does this below rebus puzzle mean?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

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

You can hear me, but you can't touch or see me.

What am I?