Identify the hidden meaning behind this picture?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

Which alphabet letter is a question?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?