What does does this rebus picture means ?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

You see me once in June, twice in November, and not at all in May. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

Can you identify the famous TV character from the rebus below?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?