Count the squares in the matchstick puzzle below?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Make a sentence consisting of three words that have the whole alphabet.

Name a key which is hardest to turn.

Which tank will fill first?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?