Math Mayhem
Math practice as a dungeon run, not a worksheet
What it does
Kids 7–12 race a fantasy dungeon and swipe into the right answer door for + − × ÷. No ads. Parent-gated Unlimited. Missed facts get reviewed. Built after flashcards lost to phones one too many times.
Practice + − × ÷ in a fantasy dungeon run, not a worksheet. Kids swipe into the right answer door, review misses, and build fluency. Free on iPhone & iPad.
Does the same job
all alternatives →- IMI made a little math game named Summle2022 · summle.net · ▲189
I made this game for my children to play, as they are heavily into Wordle, and I thought they'd also like something maths based! Every puzzle is solvable and has at least one solution (usually more). There is a kids mode in the settings, plus a hard mode for extra difficulty.
- SMSilly math games to make learning fun for K through 3rd grade2023 · mindlygames.com · ▲90
Please let us know what you think. We would be so so grateful for feedback from the community. Thank you in advance!




More life & fun this month
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Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com