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

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Who can jump higher than a Mountain?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?