The mathematics of sidewalk illusions

September 25th, 2019|

Have you ever come across an oddly stretched image on the sidewalk, only to find that it looks remarkably realistic if you stand in exactly the right spot? These sidewalk illusions employ a technique called anamorphosis — a special case of perspective art where artists represent 3D views on 2D surfaces. So how is [...]

Making Sense of Irrational Numbers

June 5th, 2019|

Like many heroes of Greek myths, the philosopher Hippasus was rumored to have been mortally punished by the gods. But what was his crime? Did he murder guests or disrupt a sacred ritual? No, Hippasus's transgression was mathematically proving the hitherto unprovable. Ganesh Pai describes the history and math behind irrational numbers. Lesson by Ganesh [...]

The hardest math problems of 2018 that went viral

December 19th, 2018|

Let's take a look back to the hardest math problems of  2018 that went viral as the internet seems to have a bit of a love-hate relationship with math. People couldn't get enough of math questions this year as they debated the answers in Twitter threads and parenting forums. But they also lamented how much [...]

Where do math symbols come from?

October 17th, 2018|

Math is full of symbols: lines, dots, arrows, English letters, Greek letters, superscripts, subscripts ... it can look like an illegible jumble. Understanding them is a matter of memorizing them until they stick, as with any language. This video from Ted-Ed explains the symbols' origins.

How to prove the Pythagorean Theorem?

August 7th, 2018|

How many ways are there to prove the Pythagorean theorem? What do Euclid, 12-year-old Albert Einstein, and American President James A. Garfield have in common? They all came up with elegant proofs for the famous Pythagorean theorem. Watch this video by Ted-Ed to know more:  

Why can’t you divide by zero?

July 23rd, 2018|

There's one rule that we've been warned of not break, and that's to divide by zero. But why? Check out this video from Ted-Ed:

17 Equations that Changed the Course of History

May 7th, 2018|

While not everyone likes studying mathematics, admit it, mathematics and its equations have shaped up the world we have now. In 2013, mathematician and science author Ian Stewart published a book on 17 Equations That Changed The World. Check out the table below to see a summarized list of these equations: Learn more about these [...]