Can you decipher the below rebus?

PBLUESAISNUERSES

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

Why is the longest human nose just 11 inches?

The dirtier I get, the whiter I look. Who am I?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

What is the next number in this series?

4,12,84,3612....

What does this rebus means ?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What demands an answer, but asks no questions