Eight of us go fourth, not back, to protect our king from an attack. What are we?

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 can you serve, but never eat?

Give it food and it will live; give it water and it will die.

I have branches, but no fruit, trunk or leaves. What am I?

Can you find a rabbit in the given picture?

Find the number of squares in the below picture

Can you replace the question mark with the correct number in the below table sequence?

Which of the below owl is odd one out?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?