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IBM Research
research.ibm.com > blog > ponder-this-september-2026

Ponder This Challenge - September 2026 - Loeschian Arithmetic Progressions

1+ hour, 26+ min ago   (69+ words) IBM Research If you have any problems you think might make good challenges, please send them to [email protected]. This puzzle was suggested by Hugo Pfoertner - thanks Hugo! Your goal: Find an arithmetic progression of 35 terms from the Loesch numbers such…...