what does this picture(rebus) riddle means ?

What is the next number in this series?

4,12,84,3612....

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

Can you identify if it's a murder or a suicide ?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Remove two matchsticks to make the below equation correct.

What is the riddle which can be asked all day with a different correct answer each time.