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

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

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

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

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

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

What breaks yet never falls, and what falls yet never breaks?

Do You See It?

What is the Surname of Barbie Doll?