Crux Mathematicorum Vol. 51, No. 9 « v51, n8 indexv51, n10 » November, 2025 PageContents 403 MathemAttic: No. 69 403 Problems: MA341 – MA345 405 Solutions: MA316 – MA320 411 Problem Solving Vignettes: No. 39 — Shawn Godin 415 The Usefulness of Formulas in Solving Matrix Problems — Florin Stanescu 420 Olympiad Corner: No. 437 420 Problems: OC751 – OC755 422 Solutions: OC726 – OC730 428 Problems: 5081 – 5090 432 Solutions: 5031 – 5040 Read the issue below Download this issue (PDF) Crux Mathematicorum