20 hand-picked, high-difficulty questions targeting the exact patterns Korean students most often miss: sign-direction traps, extraneous solutions, at-least/at-most wording, unit and ratio traps, and calculation-heavy setups. Master this set and very little on the real test will surprise you. Includes a full built-in Desmos graphing calculator.
Answer choices are checked instantly — the explanation appears the moment you answer, so you can study independently at your own pace.