Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What can you see in the middle of March and April that you can never see in any other month?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

How do you go from 98 to 720 using just one letter?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

I have branches, but no fruit, trunk or leaves. What am I?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

What number when divided in half becomes zero?