My face when my chemistry teacher says I got a 10 in the exam.

I'm not sure but I believe this way of grading is in Mexico. I've seen shows thats originate in Mexico and this is how they would say their grades. Example: "I got a 5 on the test. My mom's gonna kill me." So, they just use single numbers rather than two digits. (Again. I'm not sure. So correct me if I'm wrong)

You're correct :)

y te apuesto una guitarra que el si es genial

hahaha