In a new game called Nooseball, you can only score points 2 ways. You can score 7 points for a "touchdown," and 3 points for a "field goal." What is the total of all the possible final scores that cannot be achieved in this game?
I'm having a really hard time with this problem. How can you solve this when you don't know what the maximum scores can be etc — I must be missing some crucial information. Any help would be really appreciated!