Here’s a classic brainteaser that I don’t like. What’s the next number in this sequence: 1, 11, 21, 1211, 111221, …? The answer is 312211, because each number describes the digits in the number that precedes it. We open with 1, an arbitrary choice, but the next number describes 1 as “a single one,” i.e. “one one,”…
‘Tis the season for New Year’s resolutions. As we all sign up for gym memberships or invest in a Peloton that will just gather dust by March, I resolve to work out your brain this year. January 1, 2024 is a Monday. So what day was January 1 last year? Because of the regularities in how we slice and organize time, you…
