Directions

• This is a 20-question mock set built from the hardest AMC 10 problem types — the ones Korean students most often miss due to domain traps, order-of-operations traps, overcounting/undercounting, or hidden geometric relationships.
• Click an answer choice to lock it in. The full explanation appears immediately below the question.
• Use the Desmos calculator (circle button, bottom-right) freely — real AMC 10 does not allow calculators, but this mode is for building comfort with the math, not testing speed.
• Click Print / PDF at any time for an ink-efficient, grayscale printout with an answer key on the last page.