What does below chemistry rebus means?

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?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Count the number of squares in the picture below.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

In the Wild West, you are challenged into a death match by two bounty hunters nicknamed Golden Revolver (GR) and Killer Boots (KB). You accept the challenge. None of you want to waste any of the bullet and so a certain rules are laid down:

1) All of you will shoot in a given order till the last man standing.
2) Each of you shoots only once upon his turn.
3) If any one of you is injured, the other two will finish him off with an iron rod.
4) The worst shooter of all (which is you) shoots first and the best one shoots at the last.

Now, how will you plan things if you know that you hit every third shot of yours, KB hits every second shot and GR hits every shot ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Find the hidden panda in the image below.

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?