the 100-question set.

Every question below is real SAT-style content — percent change, profit & loss, discount, tax, simple interest, compound interest, and depreciation — ordered from the easiest warm-up questions to the hardest multi-step problems. Skim the notebook above first if any formula feels fuzzy.

• Pick an answer and see the correct choice plus a short explanation immediately — right or wrong.
• Mark for Review — tap the flag on any question to come back to it later.
• Eliminate a choice — tap the ⊘ beside an answer to cross it out without selecting it.
• Every 20 questions, a small banner tells you the section is about to get a little harder.
• The results page shows only the questions you answered incorrectly — skipped ones are tracked separately.
• Print any time for an ink-friendly PDF with the full answer key on the final page.