数学クイズ なん度？ is a puzzle and trivia game by StudySwitch, Inc.. Explore official screenshots, compatible devices, and the latest JP App Store information.
JPOfficial screenshots supplied through Apple. Artwork belongs to the respective developer. Download on theApp Store ↗
Check the official page for current availability, supported devices and any in-game purchases.
App Store edition · Researched Nov 9, 2026 · Guide updated Nov 9, 2026.
In the 'Nan-do?' mode, your main objective is to calculate the angles of various plane figures. You must progress through basic stages one through four before attempting the difficult final stage challenges.
Based on source 1.
For the area puzzles, focus on calculating the area of the colored sections. You can use the provided 8x8 grid where each individual square represents an area of one, and remember to use 3.1415 for Pi.
Based on source 1.
If you are stuck on a problem, you can use your finger to write calculation notes directly in the area where the problem is displayed to help you organize your thoughts and work through the math.
Based on source 1.
To reach the final stage in the area calculation mode, you must first clear the basic problems in stages one through six, followed by the advanced problems found in stages seven through nine.
Based on source 1.
In the 'Ikutsu?' mode, your primary goal is to determine the correct number that belongs in the position marked with a question mark within a given sequence of numbers.
Based on source 1.
You can press the question mark button to view basic rules and hints. Note that these hints are not available for certain challenging problems, such as those found in the final stages.
Based on source 1.
Yes, if you are stuck, you can attach an image of the current problem to an email or share it via social media platforms to ask your friends for help with the solution.
Based on source 1.
If the app is being used by children aged 12 or under, or if it is being used on devices owned by schools, after-school clubs, or cram schools, you must purchase the ad-hiding in-app feature.
Based on source 1.
The app provides a comprehensive collection of math quizzes and puzzles, totaling 340 distinct problems designed to serve as excellent brain training exercises for players of all levels.
Based on source 1.
For problems where you need extra guidance, you can visit the official support website provided by the developers, which contains more detailed explanations for several of the puzzles featured in the app.
Based on source 1.
AI-assisted research with automated evidence and consistency checks. Good Game Daily organizes publisher information into practical answers. Guidance is an editorial interpretation of those sources. These notes are based on source research rather than a firsthand playtest; editions and later updates may differ.
Based on listed game features. This is not a firsthand review. Check the publisher’s listing ↗
たくさんの応援レビューありがとうございます！とても嬉しいです！
今回のアップデートでは広告の表示頻度を調整（低減）しました。合わせて、細かな点を改善しました。
頭の体操にピッタリの数学クイズ・数学パズルがたっぷり340問題。
これからも人気の本アプリ「数学クイズ なん度？」を宜しくお願いします！
Release notes supplied by the developer through the App Store.
Developer description, as provided in the original store listing.
基本から難問まで、さまざまな数学クイズに挑戦しよう！
教育ランキング1位獲得！頭の体操にピッタリ！多数のテレビ番組などでも紹介された人気の脳トレ・数学クイズアプリです。
◇数学クイズ【 なん度？ 】
さまざまな平面図形の角度を求めよう！
ステージ1からステージ4までの基本問題を制覇して、難問揃いのファイナルステージに挑戦しよう！
◇数学クイズ【 面積は？ 】
さまざまな平面図形の面積を求めよう！
ステージ1から6の基本問題、7から9の発展問題をクリアして、難問揃いのファイナルステージに挑戦しよう！
ルール）
・色が塗られている部分の面積を求める
・8×8マス、1マスの面積は1
・Πは円周率（3.1415…）
◇数学クイズ【 いくつ？ 】
数列の「？」に入る数字を考えよう。
ステージ1の基本問題をクリアして、難問揃いのファイナルステージに挑戦しよう！
・補足説明
- 問題が表示されている領域に、指で計算メモを書くことができます
- 「？」ボタンを押すと、考え方や基本ルールなどの粗いヒントが表示される（ファイナルステージなど、一部の問題では表示されません）他、SNSやメールに問題画像を添付して友達に質問することができます
- 12歳以下の方がご利用の場合、および、学校、学童、塾など、団体が所有する端末でご利用の場合は、App内課金「広告非表示」のご購入をお願い致します
・謝辞
問題作成にあたり、灘、甲陽、筑駒、開成高校卒業の大学生の皆さんにご協力頂きました。御礼申し上げます。
・サポートサイト
多数の質問を頂きましたので、いくつかの問題についてやや詳しいヒントを掲載しました。合わせてご利用ください。
http://areas.hateblo.jp/
・開発者への連絡方法
取材、または、不具合などを発見された方は、アプリ内の「お問い合わせ」から、ご連絡ください。
Apple App Store lookup ↗ · Store ratings, prices, and availability can change. Check the App Store for your region.
数学クイズ なん度？ is listed on the JP App Store. Availability varies by region and compatible device.
The recorded download price is free. In-app purchases, subscriptions, or additional content may cost extra. Source checked Nov 9, 2026.
Good Game Daily compares available samples of recent game mentions with the preceding 24-hour window. Coverage and source failures are disclosed. Read the methodology.
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