There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?.

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

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

When monkey rotate the gear, which mark will be hit 1 or 2 ?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?