Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

What happened when the wheel was invented?

Count the number of lines in the image below ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Can you write down eight eights so that they add up to one thousand?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?