If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

What can jump higher than a building?

When it is alive we sing, when it is dead we clap our hands. What is it?

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

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.