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

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I look at you, you look at me, I raise my right, you raise your left. What am I?

How many triangles are there on the puzzle below?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?