why number 8549176320 is one of a kind?

What does this below rebus puzzle mean?

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

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

How many times can you subtract the number 5 from 25?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

You can move only two matchsticks in the given picture. What is the highest number you can form by doing it?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

If eleven plus two equals one, what does nine plus five equal?