Eraser Situation and Math Test Situation

i lost my eraser. i was doing a test in physics class and I made a few mistakes on the Multiple Choice Questions and I didn't have anything to erase it with. So then I tried to use the end of my pencil but there was barely any eraser bit sticking out. But it was my only hope so I scratched out a bit of eraser bit from the eraser hole with my nail; I rubbed the Tiny Scrap Eraser that I got out onto my mistake and it just barely worked. anyway. I think I failed that test because I didn't study (it was unfairly sprung onto us I think). I hope you understand my description of that little Eraser Situation. 

I had to take a new pencil with a full eraser from my History Classroom to use on the math test coming up next. Would you like to hear about my Math Test Situation(I think it's a little interesting). Well, it was a redo of a math test that I got a 37/50 on. I wanted to get a better score to make my B into an A, and my teacher allows a few retakes. It took a bit of cheating and Fraudulent Behavior to confidently turn in my test redo, but I did it and I sacrificed my lunch break for it. Guess what I got. I got a 39/50. I have no idea how but I barely improved. That is a 74% to a 78%..! In the end, my grade went up to an 89.11. I'm fine with a B honestly but there was a very good chance to get an A and I just missed it. I don't want to seem like I'm complaining so I'll end this with a Good note: I got myself a new eraser