When can we add 2 to 11 and get 1 as the correct answer?

What has lots of eyes, but can’t see?

What is more useful when it is broken?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

What breaks yet never falls, and what falls yet never breaks?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

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?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”