why number 8549176320 is one of a kind?

A father's child, a mother's child, yet no one's son.

Who am I?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Prove that twice of ten is the same as twice of eleven.

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Replace the question mark with the number below given a simple math problem.

What is black when you buy it, red when you use it, and gray when you throw it away?

How far can you walk into the woods?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?