When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

John was piloting a plane behind a car but was never able to overtake it. Why?

Can you solve this picture maths equation?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Which point will the car reach to go out?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Readers with the eyes of a hunter can find the snake in the field. Can you? Test your puzzle-solving skills now!