I have teeth but i don't bite. Who Am I ?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

It belongs to you, but other people use it more than you do. What is it?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

By using 'because' continuously three times, can you make an English statement ?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What will you call your mother's brother's brother-in-law?