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 kind of band never plays music?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

What runs around the whole yard without moving?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

Can you convert the number zero(0) into a positive number using just one mathematical operator ?