What does this rebus riddle means ?

Which letter of the alphabet has the most water?

Can you make a six-letter word using the letters N, A and B ?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Can you count the number of matches in the picture below ?

Why is Saturday stronger than Monday?

What has hands, but can’t clap?

What does below Rebus say?

XLR8

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?