What is so fragile that saying its name breaks it?

I can be cracked, made, told, and played. What am I?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Can you make four (4) nines (9) equal 100?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

What is at the end of a rainbow?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What you cannot hold but it is yours?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?