What four weights can be used to balance from 1 to 30 pounds?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

When does a USA Potato change its nationality?

How can a man go eight days without sleep?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What Adam and Eve do not have but the rest of the people have?

What does it mean?

No matter how little or how much you use me, you change me every month. What am I?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?