Answer:
When you are reading for context, you are trying to figure out what a word might mean based on the other words of the sentence. A good sentence to help you learn what a paradox means might be the following.
Jack tried to figure out the paradox of being in two places at one time.
That hints that a paradox is something confusing. It means something that is highly unlikely, or even impossible, such as being in two places at once or going back into the past and killing your own father before you are born.