Richard Feynman taught himself trigonometry, advanced algebra,...

Richard Feynman taught himself trigonometry, advanced algebra, infinite series, analytic geometry, and both differential and integral calculus at the age of 15. While working at the Los Alamos lab, he pranked his colleagues by cracking the combination locks on cabinets that held top-secret atomic research by trying numbers he thought a physicist might use.

from Unbelievable facts http://bit.ly/2HAa1B1