How well do you know these common English Idioms? - Part 3

What does "to hit the nail on the head" mean? 

To do or say something that is perfectly correct 

To hammer down a nail in the perfect spot 

What does it mean when something is "A dime a dozen"? 

That something is very common or easy to find 

What does "To beat around the bush" mean? 

What does it mean when two people are "on the same page"? 

That they have a shared understanding of something 

What does it mean if there is "an elephant in the room"?

That there is something that takes up a lot of space 

That there is an important and obvious matter not being spoken about