Crux Mathematicorum Vol. 47, No. 9 « v47, n8 indexv47, n10 » November, 2021 PageContents 411 MathemAttic: No. 29 411 Problems: MA141–MA145 414 Solutions: MA116–MA120 419 Problem Solving Vignettes: No. 19 — Shawn Godin 425 Olympiad Corner: No. 397 425 Problems: OC551–OC555 427 Solutions: OC526–OC530 433 Focus On . . . : No. 48 — Michel Bataille 440 Unexpected Applications of Newton’s Theorem — Aditya Khurmi, Aatman Supkar, Arindam Bhattacharyya and Shuborno Das 449 Problems: 4681–4690 453 Solutions: 4631–4640 Read the issue below Download this issue (PDF) Crux Mathematicorum