By using 'because' continuously three times, can you make an English statement ?

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?

What is the next number?

77, 49, 36, 18 ?

You were playing ping pong with your friend. Suddenly the ball fell into a narrow metal pipe that was imbedded in the concrete surface of the floor one foot deep. Now you don't have any other ball and you desperately want to take it out and play. You and your friend have your shoelaces, your tennis paddle and a plastic water bottle. However, the bottle cannot fit into the pipe.

How will you take the ball out?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

I have an eye but still cannot see.

Who am I?

Find the next number in the sequence

5 12 24 36 ?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?