"Life for me ain't been no crystal stair" shows that the mother didn't have an easy life and had to work hard at everything.
Hope this helped! Let me know if there is anything I need to clarify or explain more in depth
I believe the correct answer is a duel between Laertes and Hamlet.
Laertes had many reasons to want to kill Hamlet, the most important of which are the facts that Hamlet killed Polonius, Laertes' father, and indirectly led to Ophelia, Laertes' sister, committing suicide. So the excerpt above talks about their future duel in which Hamlet says he would kill Laertes in only three hits.
Answer: This is confusing but I do not agree that much because,
If we simply add the highest number twice from the digits 1-9, 9+9, which is 18. So 18 is the highest number which can be reached so 20 is not a possible number. However, if the problem has said that, we can obtain all the numbers from eleven to twenty by multiplying them, then I think it is possible...