When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What is harder to catch the faster you run?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

How can you write nineteen in a manner that if we take out one, it becomes twenty?

How many triangles are there on the puzzle below?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

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?