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?

Find the value of "?" in the ball picture Riddle below:

What begins with T, ends with T, and has T in it?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

How can one talk without saying a single word?

By moving just one matchstick, you need to make the below statement true. Can you do it?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

What has one letter and starts with an E?

Which is the smallest number that you can write using all the vowels exactly once?

Which flower has two lips?