The non-randomized, uncontrolled, effectively ineffective puzzle, game, and math blog. It's mostly puzzles right now. I have an educational game available for free at playcebo.itch.io/factor-crafter, with more projects coming soonish.

Most puzzles can be solved from this blog; no need to paste them into image editors. For proper formatting (such as hiding spoilers), please use a browser, not the Tumblr app.