Math class often skips the best parts.
Between the worksheets and the timed drills, the actual stories, the clever inventions, the cultural quirks, and the human element somehow gets lost.
But the history behind the numbers is often more interesting than the calculations themselves. Here are a few surprising facts that reframe math not as a rigid set of rules, but as a subject with a rich and often strange backstory.
1. The Equals Sign is a 16th-Century Hack
Before the 1550s, equations were written entirely in words. Tired of repeatedly writing “is equal to,” a Welsh mathematician named Robert Recorde introduced a simpler way to express equality. As he explained in The Whetstone of Witte (1557) [translated]:
“And to avoid the tedious repetition of these words: is equal to: I will set, as I often do in my work, a pair of parallels, or twin lines of one length, thus: =, because no two things can be more equal.”
It was a simple, elegant solution to an everyday annoyance, and the equals sign was born.
2. 'Algebra' Comes from Bonesetting
The word 'algebra' has a surprisingly medical origin. It comes from the title of a 9th-century Arabic text, Al-Jabr, written by the Persian mathematician Al-Khwarizmi.
The term originally described the process of “reuniting broken parts,” much like the surgical practice of setting a fractured bone back into place. Over time, it came to represent the mathematical act of bringing both sides of an equation into balance, just like we do in algebra.
3. Zero Was Invented Twice
The idea of a number for "nothing" was a huge conceptual leap. It was developed independently by two different civilizations: the Mayans in the Americas and the ancient Indians.
For centuries, Western mathematicians, including the ancient Greeks and Romans, had no symbol for zero, which made their number systems incredibly cumbersome.
4. A 'Jiffy' is a Real Unit of Time
It isn’t just a casual phrase. In physics and computing, a 'jiffy' is a real and specific slice of time.
In computing, a 'jiffy' is the duration of a single tick from a processor's internal clock, which acts like an incredibly fast metronome. This fixed moment is often just one-hundredth of a second. It's the standard unit of time a computer uses to schedule its many tasks.
In physics, a 'jiffy' measures something even faster. It’s the time it takes a beam of light to travel one centimeter (about the width of a fingernail) through a vacuum: empty space where nothing can slow it down. It’s one of the shortest moments science can measure.
5. We Count in Base 60 Every Day
We usually count in the base-10 number system. Simply put, our number system is built around tens. Once we reach 10, we start a new set (20, 30, 40, and so on).
But the ancient Babylonians preferred to count in groups of sixty (base-60 number system), where their counting was organized around sixties instead of tens.
While it sounds strange, we still use their base-60 number system every day: 60 seconds in a minute, 60 minutes in an hour, and 360 degrees in a circle are all remnants of the Babylonian way of counting from thousands of years ago.
6. A Baker's Dozen is Medieval Insurance
Why is a "baker's dozen" 13? In medieval England, laws against shortchanging customers were severe.
To avoid any risk of accidentally selling an underweight batch and facing a penalty, bakers would add a 13th loaf to every dozen as a safeguard.
7. The Word 'Hundred' Used to Mean 120
We take for granted that a hundred means ten tens. But it wasn't always so clear-cut. The English word "hundred" actually comes from the Old Norse word hundrath, which originally meant 120.
This was known as the "long hundred," calculated as ten groups of twelve (or six score). This duodecimal (base-12) way of counting was common in old Germanic and Norse cultures for trade and agriculture. Our familiar base-10 "short hundred" eventually took over as the standard.
8. The Birthday Paradox Defies Logic
Here’s a fact of probability that sounds wrong but isn't. In any group of just 23 people, there's a 50% chance that two of them share a birthday.
If you get 70 people in a room, the probability jumps to 99.9%. It’s a classic example of how statistics can produce counterintuitive results.
The Power of a Good "Did You Know?"
Math stops being abstract when it has a story. For instance, honeybees use hexagons as they are the most efficient shape for storing honey. And the number 'zero' was a revolutionary invention that took centuries to develop.
We believe discovering these stories is key. If you agree, book a demo class with Bhanzu today and see how we bring math to life.
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