A word I know has six letters it contains, remove one letter and 12 remain. What is it?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

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

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

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.

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

Why do you find that most of the buildings are deprived of the 13th floor?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?