不定方程式ガチャ

Akira Hiraoka

About this app

The Indeterminate Equation Gacha is a service released on the Oishii Mathematics website on December 1, 2025, that randomly presents three indeterminate equation problems from Mathematics IIBC. This app inherits the functionality of the web version and is an enhanced version.

The app version has the following features in addition to the web version:

1. More problems than the web version, with 7,038 possible gacha combinations (compared to 2,592 in the web version).
2. Unlimited gacha spins, no time limit.
3. Advanced-only switch (press (3) to ensure an advanced level is drawn).
4. Additional information included (contains relevant information such as background knowledge and sources for the problem).
5. Built-in timer (measures up to 100 minutes after spinning the gacha, useful for time attack).
6. New problem identification function (distinguishes between new and previously-released problems).
7. Marking function (allows you to mark correctly answered problems).
8. No ads.
9. List of all problems from beginner to advanced (including problems added to the web version)
10. Link to the page for Oishii Mathematics indeterminate equations, improved for the app (even those new to indeterminate equations can start from scratch)
11. Calculation sheet function (simple)

First-time users can try out the free web version of Oishii Mathematics by searching "indeterminate equation gacha" on Google.
You can also search for "indeterminate equation gacha" on X (Twitter).