A full-length, exam-format module built entirely from the question types Korean students miss most often: nonlinear systems, extraneous rational/radical roots, parameterized linear systems, exponential and geometric growth, complex numbers, and multi-step word problems.
Questions
20, all Hard / Very Hard tier
Time
35 minutes (adjustable)
Calculator
Built-in graphing calculator (Desmos)
Feedback
Instant explanation after each answer
Every problem was solved and independently cross-checked three times using symbolic computation before being included — you will not encounter a broken key.
Select an answer choice to see it graded instantly, with a full worked explanation and common-mistake warning.
Use the calculator icon in the top bar to open a full graphing calculator, exactly as on the real exam.
When you finish, you'll get a topic-by-topic score breakdown and can print a clean, ink-light answer key.
SATPractice — Math
Module: Hardest 20
Time35:00
Solve each problem, then choose the best answer from the choices given. You may use the calculator for any question. All variables and expressions represent real numbers unless otherwise indicated.
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of 20
TopEduPrep · Practice Candidate
Question Navigator
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Graphing Calculator
Review Page
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TopEduPrep — SAT Math: Hardest 20 (Full Mock)
topeduprep.uk | Print-friendly edition | Answer key and explanations follow the questions.