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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you count the number of children in the picture below

With the help clues provided in the image, can you find the 5 digit key?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Find out the number of circles in the given picture having Illusion

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

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?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?