Crux Mathematicorum Vol. 45, No. 4 « v45, n3 indexv45, n5 » April, 2019 PageContents 167 Editorial — Kseniya Garaschuk 168 MathemAttic: No. 4 168 Problems: MA16–MA20 170 Contest Corner Solutions: CC331–CC340 175 Problem Solving Vignettes: No. 4 — Shawn Godin 178 Teaching Problems: No. 1 — John McLoughlin 181 Olympiad Corner: No. 372 181 Problems: OC426–OC430 183 Solutions: OC376–OC385 193 Application of Correspondence: Counterparts — Olga Zaitseva 196 Problems: 4431–4440 202 Solutions: 4336–4350 Read the issue below Download this issue (PDF) Crux Mathematicorum