If eleven plus two equals one, what does nine plus five equal?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

What does this Rebus Picture means ?

The host of a game show, offers the guest a choice of three doors. Behind one is a 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?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

I shave every day, but my beard stays the same. What am I?

What does this simple rebus mean?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?