Replace the question mark with the correct number in the below-given picture?

I have teeth but i don't bite. Who Am I ?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

What does this rebus photo means?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?