A Bluebook-style practice module built from the question types Korean students miss most often. Answer, see the explanation instantly, then push through every trap again on paper.
Graphing calculator (Desmos) built in, same as the real digital SAT
Reference sheet available from the toolbar
Explanation appears immediately after you lock in each answer — this is a self-study module, not a timed simulation of the real exam screen (though the layout matches it)
AlgebraAdvanced MathProblem-Solving & Data AnalysisGeometry & Trigonometry
Why these 22
Every item was chosen because it hides a specific trap: an extraneous root, a sign flip, a unit switch, a "no solution vs. infinite solutions" condition, a conditional probability, an average-of-rates trick.
Every numeric answer was solved three separate times with symbolic computation (SymPy) before being placed in this file, so the key is verified, not typed by hand.
If you can clear all 22 without guessing, you can handle anything the real test hides behind an easy-looking setup.
TE
Section 1, Module 1: Math
35:00
Practice Candidate
For each question, determine the best answer using any available space for scratch work. Then select the corresponding letter. The graphing calculator and reference sheet are available for every question in this module. Some questions do not require a calculator to solve efficiently. Unless a note says otherwise, all variables and expressions represent real numbers.
1Algebra
Question 1 of 22
Kim Min-ho | Top Edu Prep
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Desmos Graphing Calculator
Reference sheet
A = πr² C = 2πr
A = lw
A = ½bh
a² + b² = c²
V = πr²h
V = 4/3 πr³
V = 1/3(base·h)
V = lwh
The number of degrees of arc in a circle is 360.
The number of radians of arc in a circle is 2π.
The sum of the interior angles of a triangle is 180°.
Special right triangles: 30-60-90 sides in ratio x : x√3 : 2x. 45-45-90 sides in ratio x : x : x√2.
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SAT Math — Hardest Questions Module
Top Edu Prep · Kim Min-ho | 22 Questions | Answer key and explanations on the final page