Some readers may solve the problem procedurally: line up the two numbers, add the ones column, carry the one, and add the tens to get 43. Others might instead notice a creative shortcut: 29 + 14 is ...

Global math archive: MIT and collaborators launched MathNet, the largest Olympiad-level problem collection, spanning 47 countries, 17 languages, and four decades of competitions. Thinking like Fermi: ...