Killer Math

Killer Math is a learning app that compiles and displays only "killer" and "near-killer" math questions from mock exams and the CSAT administered to 1st, 2nd, and 3rd-year high school students since 2023. Instead of skimming the entire curriculum, you can study by selecting only the high-difficulty questions that differentiate students' abilities, featuring clear formulas, diagrams, and step-by-step explanations.

No registration or login is required. You encounter the problems immediately upon opening the app, and content downloaded once can be accessed even offline.

No registration or login is required. ■ Suitable for:

· Students who want to focus on solving only high-difficulty (killer/near-killer) questions from the CSAT and mock exams

· Those who want to quickly scan which questions were difficult for each exam

· Those who want to collect incorrect answers and high-difficulty questions separately for repeated review

· Those who want to solve one question at a time during spare time

■ Key Features

· Killer/Near-Killer Selection — Curated only high-difficulty questions with high discriminatory power, rather than all questions

· View by Grade — Select and explore Grades 1, 2, or 3

· Search by Exam — Check question collections by year, month of exam, or subject

· Quick Search — Find desired questions immediately via search

· Favorites — Save difficult questions for repeated review

· Mark Solved — Record how far you have progressed on your device

· Clear Rendering — Clearly displays formulas and shapes and provides step-by-step explanations

· Offline Viewing — Check downloaded questions without a network connection

· Automatic Update — Syncs to the app incrementally as new content is added

■ Content Covered Killer and near-killer questions from the Mathematics sections of mock exams and the CSAT for 1st, 2nd, and 3rd year high school students from 2023 onwards

· High-difficulty question types across the entire high school mathematics curriculum, including Mathematics I, Mathematics II, Calculus, Probability and Statistics, and Geometry

· Content is continuously added and updated whenever a new exam is released

■ User Guide

· Provided for free, and full-screen advertisements are displayed within the app.

· No membership registration is required, so direct identifying information such as name or email is not collected.

· Learning records, including favorites, solved problems, and settings, are stored internally on the device.