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

Can you solve below mathematical equation?

2^1234 - 2^1233

A and B have a certain number of chocolates with them. If B gives one chocolate to A, they will have an equal number of chocolates. But if A gives one chocolate to B, then A will be left with half the number of chocolates that B has.

Can you find out the number of chocolates they have right now?

When can we add 2 to 11 and get 1 as the correct answer?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Replace the question mark with the correct number in below Picture:

Kids with the most attentive eyes can spot a different watermelon in 4 seconds. Can you? Test your eyes now!

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

Why Aeroplane windows are round?