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

Give it food and it will live; give it water and it will die.

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

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

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

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