World Solve — A living repository of problems worth solving.

What World Solve is

World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

For builders Skip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

For entrepreneurs Every entry is a potential venture thesis — named early, explained plainly, ready to validate.

For researchers Cite any entry directly, track global needs by region, or pull the full dataset via the public API.

1355 total logged

1355 still open

0 marked solved

7 registered profiles

We haven't proven whether it's always possible to divide a cake fairly among any number of people, each with completely different preferences, using a finite number of straight cuts.

open Global / Unspecified, Global

Fair division problems become extremely complex once individual preferences differ, and general efficient solutions for many people remain incompletely understood. This connects mathematics to real-world negotiation and resource allocation.

number people preferences haven proven mathematics-logic

WS01264 · Logged by The Internet (open_thinker) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01264 Title: We haven't proven whether it's always possible to divide a cake fairly among any number of people, each with completely different preferences, using a finite number of straight cuts. URL: https://worldsolve.org/index.php?api=problem&id=1264