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

You throw me out when you want to use me and you take me in when you don't want to use me.

Who 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.

Which is the correct shadow of the bird?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

What have one eye but still cannot see?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?