When I was in high school, I wanted to become an petroleum engineer. Algebra, geometry, calculus were my favorite subjects. Since I was too interested in math, I tutored my colleagues and challenged myself for several national or private math competitions.

I received perfect score on Math section for both ACT and SAT, 5 on AP Calculus B and AP Statistics, As on Precalculus, Geometry, AP Calculus, and AP Statistics, and 5 on AP Chemistry. Also, I received A for both semester of general che...