What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

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 Next Number In The Sequence

30 10 15 13 0 16 -15 ?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

How could a baby fall out of a twenty-story building onto the ground and live?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

what's the probability of getting a king or a queen from a pack of 52 cards?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?