4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

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?

How far can you walk into the woods?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

If eleven plus two equals one, what does nine plus five equal?

What is both possible and impossible at the same time?

Spot what is wrong here in below Picture?

Why do we preferably have round manhole covers and not square ones?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.