Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder
Husband. Dad. Cat housemate. PhD. Works on Abstract Wikipedia and Wikifunctions at Wikimedia Foundation. Wikidata founder. Previously: ontologist at Google, Wikimedia Trustee, and RPG author. Roots in Brač, Croatia. Stuttgart, Germany. he/him. Views my own. Posting cat pics and occasionally other stuff. # tootfinder
Additions with unique digits: A tale of puzzling and AI
The other day, Markus Krötzsch and I were catching up when one of his kids came in. She told us about a puzzle her math teacher gave her:
How many integer sums are there where the equation uses each digit at most once?
The simplest example is 1+2=3, but 12+47=59 also works. On the other hand, 1+9=10 isn’t a solution because the digit ‘1’ appears twice (in the first number and the sum).
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