I passed 10 levels of math at my community college and now at a Uni pursuing a BSN 
I’ve made it all the way to differential equations one of the toughest math class 8 students failed out of 15 and 7 passed including me.
For some strange reason I didn’t get charged interest all this time I’ve been using my credit card but I do get cash back a bit on it too. Cause I opened this card a few months ago.