How many sides does a circle have?

I know a nine-letter word having only one vowel.
Do you ?

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

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

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?

Can you find the missing piece of the Porsche?

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

I am white when I am dirty, and black when I am clean. What am I?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

How many letters are in the alphabet?