H E L L O
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Dr. Shapiro's Puzzle of the Day

Today's Puzzle

Wednesday, March 17
My daughter uses 50–100 words. What is the one word she uses with two clearly different meanings (a noun and an adjective)? The way she pronounces it rhymes with "launch", which solves a notorious problem for poets.

   


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Yesterday's Puzzle + Solution

Yesterday I made a number of alterations, some of them rather subtle, to the text and style elements on the Puzzle of the Day page that don't normally change. How many changes could you spot?

Solution There were 16 deliberate changes. Here they are, followed by the number of people who identified each one:

A few of you noticed a 17th change which was unintentional. For months, the page said "Congratulations to yesterday's solvers…" But yesterday it said "winners" instead of "solvers". That has actually been the case since February 23, when I announced the winners of the contest to make 2021 from as few 2's as possible. I meant to change the wording back to "solvers" the next day, but I never did!

Here's a side-by-side comparison of yesterday's PotD page and a normal version (note: I haven't tested this in all browsers, so good luck).

The top finders were Yana (15), Ena (13), Charlie (12), Caden (11), Connor (11), and Leo S. (11). In no particular order, honorable mention to Lucia, Lemonade, Maddy, Atticus, Jacob C., Inca, Anna J., Peter M., Mr. Gregg, Graham, and Kate. I hope you all had fun!

About This Site

Though he now teaches mathematics, Dr. (né Mr.) Shapiro's first job in a K–12 school was as a lunch monitor in Davis, CA. It was there that he originated the Puzzle of the Day, even rewarding correct answers with tickets in denominations like "15 points" (though without a clear idea of how he'd ultimately redeem these). Dr. Shapiro's favorite puzzle from this pre-professional era was "Tell me the location of the beehive on this campus."

Ten years later, Dr. Shapiro revived Puzzle of the Day at Proof School, writing each day's puzzle on a name tag. After 600 puzzles or so, he was just starting to feel normal about students reading his chest all the time when campus closed and the puzzle, like the rest of our lives, moved online. New puzzles are posted daily on school days.

Want to catch up on old PotDs? There's an archive currently containing puzzles from March to December 2020.