What does an Island and the letter T have in common?

Which number should replace the question mark?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

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

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

Can you solve the maths in the below-given picture equation?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?