If you know you want to fly helicopters for a living, consider going to college for math, physics, or aeronautical engineering. Helicopter pilots need to know algebra, geometry, trigonometry, and calculus. There will be math questions on the test, and you will need especially good math skills to fly commercially. You can take math classes at your flight school or aeronautical college. You can also study with books and study guides: look for guides written specifically for pilots.