What does below rebus means ?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

Can you solve below mathematical equation?

2^1234 - 2^1233

Can you move 2 matchsticks to form four equal sized squares.

In the picture given below, can you find out which digit will take place of the question mark?

what's the probability of getting a king or a queen from a pack of 52 cards?