Crux Mathematicorum
Vol. 46, No. 8
last
October, 2020
PageContents
333 Dedication
334 Fibonacci Plays Billiards — Elwyn Berlekamp and Richard Guy
348 Tribute — Bill Sands
349 MathemAttic: No. 18
349 Problems: MA86–MA90
352 Solutions: MA61–MA65
357 Problem Solving Vignettes: No. 13 — Shawn Godin
361 The Eugene Strens Collection — John McLoughlin
364 Olympiad Corner: No. 386
364 Problems: OC496–OC500
366 Solutions: OC471–OC475
373 Notes on a Sum Problem — Bill Sands
379 Squares near products of consecutive integers — Ed Barbeau
384 Squares with Large Digit Average — Matthieu Dufour and Silvia Heubach
390 An introduction of the problem of finding the chromatic number of the plane (I) — Veselin Jungić
397 De l’utilité d’une vieille curiosité grecque — Claude Goutier
404 Every positive integer is a sum of four squares — Michael Barr
408 Some memories of Richard Guy — Alex Fink
413 Cyclic Subtraction Set Games — Silvia Heubach, Melissa A. Huggan, Richard J. Nowakowski, Craig Tennenhouse
415 Problems: 4571–4580
420 Solutions: 4521–4530