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?

Prove that the below maths equation is true.

8 + 8 = 91

John is the son of Jacob.
So,
Jacob is the_____of John's father?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

Before Mount Everest was discovered, what was the highest mountain in the world?

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