3n or Not vs MathLitera

3n or Not is a game to quickly discrimination whether that number is a multiple of 3 or not.

[App Introduction] This app is a learning support tool designed to efficiently acquire the “fundamental mathematical literacy up to high school level,” which is essential for studying mathematics at university. It covers basic problems across all areas of high school mathematics and is designed to enable systematic and continuous learning. The goal is to address the issue of “entering university with a shaky foundation and struggling to keep up with classes,” and to provide a solid base for confidently tackling university mathematics. [Key Features] - Randomly generated problems: 　The values in the problems change each time, fostering true understanding and application skills rather than mere memorization. - Answer format supporting mathematical notation: 　Even complex answers involving fractions or radicals can be entered by selecting the appropriate answer format. This makes it possible to practice problems that conventional apps have difficulty handling. - Adaptive learning: 　The system adjusts the types of problems presented based on accuracy and answer history, allowing users to focus on weak areas and study more efficiently. [Learning Modes] 1. Practice Mode: 　Freely select topics to generate practice problems and focus on strengthening weaknesses. 2. Exam Mode: 　Set problem ranges and numbers to simulate real exams, ideal for time management and testing practical ability. 3. Simple Mode: 　A time-attack style multiple-choice quiz to train basic knowledge of mathematics in a fun way. Compete with friends or other users and strengthen your skills even in spare moments. [Mechanisms to Sustain Learning] - Friendly characters and an active UI design - Background music and sound effects that support concentration - Experience points earned with each problem solved, enabling users to level up and feel growth - A timer function to help maintain focus [Intended Use Cases] - Strengthening the foundation of high school students preparing for university entrance - As a review or supplementary material for university students - As a tool for adults engaging in relearning [Strengths of This App] This app generates problems randomly and features adaptive question delivery and diverse answer formats, providing a constantly fresh learning experience. Even with repeated practice, learning never becomes monotonous, allowing users to strengthen their foundational skills effectively without losing interest. It is the ideal app for those who want to learn the fundamentals of mathematics “at your own pace, efficiently, and enjoyably.” Note: This app is intended as a supplementary tool for mathematics learning. For specialized or advanced study of mathematics, please be sure to use official textbooks and specialized resources alongside this app.