We don't have always 10 or 20 questions in our assignments. What if you have 17 or 29 questions. It sometimes gives us hard time to do that calculation for each student. With this tool, all you have to do is typing the number of questions in your test into this tool and it will give each point for each number of correct questions. Also you can put the passing grade into that, and it will tell you the failing grades in red, passing grades in green.