When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Pascal’s triangle is a never-ending equilateral triangle of numbers that follow a rule of adding ...

Scientific American presents Math Dude by Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. Now that we’ve learned how to draw Pascal’s famous triangle and ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Pretend you're me and you're in math class. Actually, never mind. I'm sick, so I'm staying home today.