Crux Mathematicorum Vol. 47, No. 2 « v47, n1 indexv47, n3 » February, 2021 PageContents 71 Editorial — Kseniya Garaschuk 72 MathemAttic: No. 22 72 Problems: MA106-MA110 74 Solutions: MA81-MA85 77 Teaching Problems: No. 13 — Erick Lee 82 Olympiad Corner: No. 390 82 Problems: OC516-OC520 84 Solutions: OC491-OC495 90 Multifaceted Solutions to a Remarkable Geometry Puzzle — H. S. Hoffman and S. I. Warshaw 97 Problems: 4611-4620 101 Solutions: 4561-4570 Read the issue below Download this issue (PDF) Crux Mathematicorum