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?

Why is the Hole below a Lock?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What has a bottom at the top?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

What English word has three consecutive double letters?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

I am white when I am dirty, and black when I am clean. What am I?