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“The numbers 111, 222, 333, 444, 555, 666, 777, 888, and 999 are all evenly divisible by 37, leaving no remainder.” (via @pickover) Using base 10 notation, a three-digit number, say $aaa$, can be written as $100\cdots a + 10\cdot a + a = a \cdot (100 + 10 + 1) = a \cdot 111$. Clearly, 111 is a divisor of $aaa$ ($111 = 37\times 3$), but also of 222, 333, … Hence, all three-digit numbers that are multiple of 111 will fit the bill.
Welcome to season 2 of The Killing! Also, I just had to reboot my Macbook–Mojave upgrade–after 37 days uptime with the same Emacs running in the background.
Season 1 of The Killing is over. Hopefully, the next season is about to start.
Manuel d’analyse spatiale: Théorie et mise en oeuvre pratique avec R (Insee
Méthodes n° 131, octobre 2018). Be aware this is a 400-page long PDF file (28
Mo), so plan accordingly. (h/t @freakonometrics) #rstats #fr