Name a key which is hardest to turn.

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?

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

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

What time is it when an elephant sits on a fence?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

What does this mathematical rebus means ?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?