What does this rebus puzzle means ?

Which wheel of car does not rotate when you turn your car right?

What is the next number in the series?

15 29 56 108 208 ?

Can you count the number of squares in the given picture?

What's the only room from which no one can enter or leave

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

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 ?

What does this mathematical rebus means ?

What goes up but never comes down?