Which word does the below Plexor means ?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

In which direction should the missing arrow point?

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.

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

What is the last thing you take off before bed?

You can hear me, but you can't touch or see me.

What am I?

Look at the picture and find out which square is not linked with any of the other squares.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?