Hand-picked math puzzles, logic problems, and brain teasers in the Russian Math tradition — the kind of problems that look elementary but reward careful thinking. Many of these are drawn from Soviet-era math olympiad training materials, Peterson textbooks, and Ivan Yashchenko’s "Invitation to a Mathematical Festival" series, adapted for different age groups. Each post explains the problem clearly, walks through a solution strategy (not just the answer), and shows how the same idea appears in later grades. Great Sunday-morning material for math-loving kids and parents who want to think through a problem together without needing a textbook.
