Sample Official-Style Walkthrough Problems
Math • Advanced Math • Hard
Correct Answer: B
For what value of c does the quadratic equation 3x² - 12x + c = 0 have exactly one real solution?
Explanation: A quadratic equation ax² + bx + c = 0 has exactly one real solution when its discriminant equals zero: b² - 4ac = 0.
Here, a = 3 and b = -12.
(-12)² - 4(3)(c) = 0 → 144 - 12c = 0 → 12c = 144 → c = 12.
Reading & Writing • Standard English Conventions • Medium
Correct Answer: A
In 1928, bacteriologist Alexander Fleming returned from vacation to discover that a green mold had contaminated a petri dish of Staphylococcus bacteria; ________ penicillin was discovered by accident.
Explanation: The first clause describes the unexpected contamination event. The second clause describes the resulting historical outcome. The logical relationship is cause-and-effect, making thus or consequently the correct logical connector.
Question Bank FAQ
Are these practice questions updated for the 2026 Digital SAT?
Yes. All questions reflect the modular, digital-first format introduced by the College Board, including short 50-word reading passages and questions optimized for the built-in Desmos graphing calculator.
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Yes! Every practice question in SATGenius is synced to your automated Mistake Notebook, tagging whether your error was due to a Concept Gap, Careless Error, or College Board Trap.