You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

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

During which month do people sleep the least?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Do You See It?

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

One day, all the courtiers from Akbar's court were gathered in the assembly hall when one of them told the Emperor that all his valuables had been stolen by a thief the previous night.
This shocked the Emperor to his core as the place where that courter stayed was the most secured in the kingdom. The Emperor thought that it is not at all possible for an outsider to enter into the courtier's house and steal the valuables. Only another courtier could commit this crime. He quickly called Birbal to identify the thief.
Birbal thought for a while and successfully solved the mystery by identifying the thief in just one statement.
What did Birbal say?