What goes up but never comes down?

Can you move 2 matchsticks to form four equal sized squares.

What has one eye, but can’t see?

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 ?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

What brings you down but never up?

How many letters are in the alphabet?

A Miser man decided to go on a vacation for a month. He goes to the bank and asks for a trip loan of $500. The bank officer asks the man that the loan can only be approved when he mortgage some valuable thing at the bank. Miser man mortgages his only car whose worth was a whopping $80000. The Bank officer laughed at him and approve the loan instantly. After vacation when the miser man returns, the bank officer asked him "Are you an idiot, why is your mortgage such an expensive car for such a short loan?".

Miser man replied with some reason and the bank officer agreed that the miser man is actually not an idiot.

What did miser man reply to the bank loan officer?.

What 5-letter word typed in all capital letters can be read the same upside down?

What is the coolest letter in the alphabet?