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Modern 17-character VINs do not use the letters I, O, or Q. Those characters look too much like 1 and 0 when stamped, printed, or OCR'd. ISO 3779-style VIN practice therefore restr...
I recently bought a copy of Los Alamos Rolodex, a book displaying business cards from Los Alamos Nation Labs from 1967 to 1978. You can find some examples of the cards here. One of...
Braingle's Daily Brain Teaser for Sep 08, 2026 Complete the words below using each letter of the alphabet once only: li_ _t _o_an pu_ _ le _-r_ _ e_ _l _ _eer _cie_ _e g_ _ let...
I came across a post recently from Lord Libidan wondering about where all the good cross stitch alphabets have gone. While you can find lots of fonts on Etsy (and I even shared a f...
Many years ago—over two decades ago, actually!—I got a cell phone for a family member. I thought it would be fun to have a phone number whose digits spelled out a word (when conver...
The puzzle: Here’s an alphametic puzzle showing long multiplication of two three-digit numbers (no leading zeroes). As usual, each of the seven symbols represents a distinct digit—...
Most of us can rattle off the first few words-that-stand-for-letters of the NATO phonetic alphabet. Alfa, Bravo, and Charlie no doubt come right to mind, and depending on how many...
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