Why is 6 afraid of 7?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

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?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

Before Mount Everest was discovered, what was the highest mountain in the world?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?