What does this rebus riddle means ?

Can you find out the number that should replace the question mark with a valid reason?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Why is it very easy to weigh a fish?

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 "?".

How many sides does a circle have?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

How many times can you subtract the number two from the number fifty?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?