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

Which number should replace the question mark?

500 women soldiers are arranged in an array of ten rows and fifty columns in accordance with their respective heights. Now, the tallest woman from each row is asked to move out in the front. From them, the shortest one is labelled as Alpha. They are then asked to resume their original position.

Now, the shortest woman in each column is asked to come out in front. The tallest among them is labelled as Beta.

Can you find out if Alpha will be taller or Beta?

Replace the question mark with the correct number in the below-given picture?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

What kind of band never plays music?