Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

What is black when you buy it, red when you use it, and gray when you throw it away?

There was a strange boy who was born before his father. How can this be possible?

Replace the question mark with the correct number.

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

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Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

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I add 5 to 9 and get 2. The answer is correct, so what am I?

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