Blog
Articles on numbers, math history, and how everyday math actually works — why 91 isn’t prime even though it looks like it should be, where Roman numerals actually came from, why 1 doesn’t count as a prime number, and the real stories behind numbers like 1,729 and 6,174 that show up again and again in math trivia. Each post is researched and written to actually explain the reasoning, not just restate a fact.
- Why 91 Is Not a Prime Number
February 3, 2026 · 5 min read
91 passes every quick mental check for primality and still isn't prime. Here's exactly why 7 × 13 catches so many people out.
- The History of Roman Numerals
February 10, 2026 · 5 min read
Where Roman numerals actually came from, how they changed over two thousand years, and why they're still used today.
- Why Do We Use Base 10?
February 17, 2026 · 5 min read
The likely reason our number system has ten digits, what other bases civilizations actually used, and why base 10 isn't mathematically special.
- The Difference Between Factors and Multiples
February 24, 2026 · 5 min read
Factors and multiples are opposite relationships that get confused constantly. Here's the clean, memorable distinction between them.
- A Brief History of Zero
March 3, 2026 · 5 min read
Zero seems obvious now, but it took multiple independent civilizations and roughly a thousand years to become the number we use today.
- How Ancient Civilizations Did Math
March 10, 2026 · 5 min read
From Babylonian clay tablets to the Roman abacus, how ancient mathematicians handled arithmetic, fractions, and even square roots by hand.
- What Makes a Number 'Perfect'?
March 17, 2026 · 5 min read
Perfect numbers are exactly equal to the sum of their own proper divisors — a genuinely rare, ancient, and still partly mysterious property.
- The Fibonacci Sequence in Nature
March 24, 2026 · 5 min read
Where Fibonacci numbers genuinely show up in plants and shells — and where the popular claims about art, architecture, and the body overreach.
- Common Math Mistakes (and How to Avoid Them)
March 31, 2026 · 5 min read
The specific, recurring errors people make with percentages, order of operations, fractions, and rounding — and the habit that fixes each one.
- How Cryptography Relies on Prime Numbers
April 7, 2026 · 5 min read
Why the difficulty of factoring large numbers back into their prime components is what actually keeps modern encryption secure.
- Famous Numbers in Math: 1729, 6174, and More
April 14, 2026 · 5 min read
The real stories behind mathematics's most famous individual numbers — the taxicab number, Kaprekar's constant, and several other genuine standouts.
- Number Sense: Factors, Primes & Fast Math
April 21, 2026 · 9 min read
A complete tour of number sense — factoring, primality, GCF/LCM, fractions, roman numerals, and the famous numbers that make number theory genuinely fun.