What is always in front of you but can’t be seen?

I have feet, but no legs. Which animal Am I?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

What do you see in the image below

What am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

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 is the largest number you can write with just 3 digits?

I have teeth but i don't bite. Who Am I ?

Can you count the number of matches in the picture below ?