what does this picture(rebus) riddle means ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

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?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Who has married many women but was never married?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744