Our product and our sum always give the same answer. Who are we?

Who is that with a neck and no head, two arms and no hands? What is it?

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?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

If 1+9+8=1, what is 2+8+9?

I don't get anymore wetter, no matter how much rain falls on me.

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Buy me, smell me or deliver me, I do not change.

Who am I?

Kohli and Dhoni decided to have a paintball match.
Kohli told Dhoni, "Sir it is not right as you got thrice the paintballs I have".

Dhoni instantly gives Kohli 10 hit paintballs.
Kohli replied, "Sir, I believe you still have twice the paintballs than I have".

Dhoni gives "?" more paintballs to Kohli.
Kohli replied, "Sir it is even now, Let us have a match".

What is "?".