I’m tall when I’m young, and I’m short when I’m old. What am I?

I make two people out of one. What am I?

How many letters are in the alphabet?

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 looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

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

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.

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

What is the riddle which can be asked all day with a different correct answer each time.

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?