Fifty places where mathematics is silently running the world around you — from your GPS to your grocery shelf to the traffic jam you were just stuck in.
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Sample chapters
You don't need to know the equations. You just need to know they're there.
Every scroll you take is the output of a ranking function. This chapter breaks down the math behind recommendation systems — and why you can't stop watching videos you don't care about.
Phantom traffic jams have no cause. They emerge from the mathematics of wave propagation. Once you understand the model, you'll drive differently — and the jam behind you will be smaller.
GPS is the intersection of Einstein's relativity and multilateration geometry. Without relativistic correction, your location would drift by 10 km per day. This chapter shows the math.
Expected value math applied to any lottery produces the same result: negative. This chapter works through the calculation so you can do it yourself — and understand why the house never loses.
$1,000 at 8% for 40 years becomes $21,724. At 10%, it becomes $45,259. This chapter makes the math of compounding personal — and explains why starting early matters more than amount.
Sphere packing is an unsolved mathematical problem that took 400 years to prove. Grocers solved it empirically. This chapter connects Kepler's conjecture to your produce section.
All 50 applications
From social media to soap bubbles — the complete map of everyday math.
Clear explanations. Zero jargon. The math serves the story.
Questions
No. Every chapter assumes zero prior knowledge. The goal is to make you see the math in things you already use — not to teach you equations to memorize.
Not at all. It reads like long-form journalism. Each chapter starts with something familiar and ends with the math revealed. No exercises, no tests.
Probability, geometry, statistics, algebra, number theory, calculus concepts — all through real-world examples. The math is always the servant of the story, not the point.
PDF. Readable on any device. Download once, keep forever. No subscription.
3–5 pages each. Short enough to read during a commute. Dense enough to remember.
Fifty things you use every day — and the math that makes each one work. You'll never look at your world the same way.
One-time purchase. Yours forever.
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