Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

What goes up but never comes down?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Find the value of "?" in the ball picture Riddle below:

Which famous Hollywood movie name is hidden in the below rebus?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

You see me once in June, twice in November, and not at all in May. What am I?

Solve the following series:
AZ, GT, MN, __, YB