Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

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?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

A man dies of old age on his 25 birthday. How is this possible?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

What does this mean?

CCCCCCC

Replace the question mark with the correct number.

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What's a single-digit number with no value?