Problem solving Websites

3 curated problem solving sites, hand-picked by real people. Problem solving is about breaking messy questions into manageable pieces, then finding a path forward. What draws me to it is the satisfaction of watching a tangled knot come undone. Lumosity turns that into quick daily puzzles that sharpen logic and memory. Mathseeds does the same for young learners, building number sense step by step. Both reward persistence and clear thinking..