If eleven plus two equals one, what does nine plus five equal?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

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

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

Move four matchsticks to the below square to form three squares?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

Bay of Bengal is in which state?