# Infinite Math: Brain Puzzles — Famous problems, sharper mind

> Famous problems, sharper mind (iPhone/iPad app by kenta yamamoto.)

- Source: https://appshunter.io/ios/app/infinite-math-brain-puzzles/id6772833413 (this page in markdown: same URL + `.md`)
- Developer: [kenta yamamoto](https://appshunter.io/developer/1489320554)
- Category: Education, Games, Puzzle, Trivia
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Dutch, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean, Polish and 9 more
- Released: 2026-06-03
- Data updated: 2026-07-21
- User reviews in markdown: https://appshunter.io/ios/app/infinite-math-brain-puzzles/id6772833413/reviews.md

## What is Infinite Math?

That “I solved it!” feeling, all over again.
A math app for grown-ups who solve for pleasure—not for any exam.
From the wonder of primes and divisors to the crane-and-turtle puzzle, the Monty Hall problem, and even the legendary entrance exams of Japan's top universities—
a collection of beautiful problems that make you feel "numbers are fascinating."

■ Made for you if you
・love numbers and logic puzzles
・enjoy giving your mind a workout in spare moments
・want to know not just the answer, but the idea behind it
・are done with exams, but want to rediscover the joy of math

■ Six categories, 55+ problems (more added over time)
・Number Theory & Puzzles … primes, divisors, Fibonacci, perfect numbers, and more
・Classic Problems … crane-and-turtle, Monty Hall, the Königsberg bridges, Pick's theorem, and more
・Elementary Exams … ferris-wheel logic, seesaw puzzles, and other gems
・Junior-High Exams … work, travel, concentration, and counting problems
・High-School Exams … symmetric expressions, probability, Euler's prime-generating formula
・University Exams … legendary stumpers like "Is tan 1° rational?" and "Prove π > 3.05"

■ Highlights
・Daily Problem … one fresh problem to tackle each day
・Sessions … test yourself with five problems at a time
・Explanations worth reading … not just the answer, but the background and the thinking
・Interactive figures … trace the Königsberg bridges or Pick's theorem with your finger
・Progress tracking … solved problems are recorded; aim to clear them all
・19 languages … enjoy these problems in Japanese, English, Chinese, Korean, and more

Answers are simple multiple choice—and some figures come alive at your fingertips. Enjoy the world of numbers on your commute, on a break, or before bed.


## Version history (last 4 releases)

### 1.3 — 2026-07-11

• Added 20+ new problems (now 83 in all)
• Fresh number wonders like "a rope around the Earth" and Ramanujan's 1729
• Plus legendary entrance-exam problems from Japan's top universities

### 1.2 — 2026-06-07

• Refreshed the app icon
• Added an in-app contact form in Settings, so you can reach us directly
• Minor improvements

### 1.1 — 2026-06-04

Now available in 19 languages. Enjoy the world's famous problems in your own language.

### 1.0.0 — 2026-05-29

No release notes.

## More apps by kenta yamamoto

- [Buylis - Shopping List](https://appshunter.io/ios/app/buylis-shopping-list/id1665553308)
- [Tile Carpet Cycle](https://appshunter.io/ios/app/tile-carpet-cycle/id6772727568)
- [Routin: Calm, gentle routines](https://appshunter.io/ios/app/routin-calm-gentle-routines/id6775340906)
- [Verdash for Vercel](https://appshunter.io/ios/app/verdash-for-vercel/id6777292026)
- [Since — When Did You Last?](https://appshunter.io/ios/app/since-when-did-you-last/id6777447199)

All apps by kenta yamamoto: https://appshunter.io/developer/1489320554

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-21.*