SAT Math — Hard Module

A 22-question mock section built entirely from the question types Korean students miss most often: extraneous roots, parameter systems, data-analysis traps, and problems that demand careful English reading, not just formula recall.

• 1
  Every question was chosen because it is a frequent error pattern — not just "hard" for difficulty's sake. Read explanations even when you get a question right.
• 2
  Selecting an answer immediately reveals whether it's correct and shows a full explanation — this is a self-study tool, not a proctored exam.
• 3
  Use the on-screen Desmos calculator and reference sheet exactly as you would on test day. Practicing with them now builds the habit.
• 4
  When you finish, use Print / Save as PDF for an ink-efficient, black-and-white version with a full answer key — great for a second pass without a screen.