https://ruslanspivak.com/feeds/all.atom.xml
Aug 19, 2025
5 to 18: Why Your Count Might Be Off by One
Quick question: How many numbers are there from 5 to 18, including both ends? Your first instinct might be to subtract: 18 - 5 = 13 Feels right. But it’s wrong. It’s a small thing, and
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