Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

How many sides does a circle have?

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.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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 ?

If a wheel has 54 spokes, how many spaces are there between the spokes?