You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

How many times can you subtract the number 5 from 25?

How many sides does a circle have?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

How many letters are in the alphabet?

Which point will the car reach to go out?

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.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?