Daily Practice Questions

6 questions across multiple subjects, with detailed explanations and study tips.

📝 Questions

📝 ACT Prep Hard
The African grey parrot, which also mimics human speech and therefore can dance.
  1. A. NO CHANGE
  2. B. parrot which
  3. C. parrot that
  4. D. parrot ✓
Explanation: If conjunctions change in the answer choices, the question is likely testing Complete. When you read to the end of the sentence, you’re left hanging, waiting for the main point about African grey parrots. The sentence is incomplete, and the only way to fix it is to take out the conjunction. Choice (D) is correct.
📊 SAT Math Medium
Which choice completes the text so that it conforms to the conventions of Standard English? Rodents only make up a portion of a _____________ Servals will also use their large ears to listen carefully for the flutter of bird wings overhead or the buzz of an insect nearby.
  1. A. helps
  2. B. helping
  3. C. helped
  4. D. help ✓
Explanation: “Help” would match both the plural subject of “professionals” and the present tense of the sentence as indicated by the verb “allow.” Choice (A) is a singular verb, and (B) and (C) are not present tense plural verbs.
🎓 GRE Prep Easy
A company paid $500,000 in merit raises to employees whose performances were rated A, B, or C. Each employee rated A received twice the amount of the raise that was paid to each employee rated C; and each employee rated B received one-and-a-half times the amount of the raise that was paid to each employee rated C. If 50 workers were rated A, 100 were rated B, and 150 were rated C, how much was the raise paid to each employee rated A?
  1. A. $370
  2. B. $625 ✓
  3. C. $740
  4. D. $1,250
  5. E. $2,500
Explanation: Let x be the raise for each C-rated employee. Then A-rated employees received 2x and B-rated received 1.5x. Total raises: 50(2x) + 100(1.5x) + 150(x) = 100x + 150x + 150x = 400x. Set equal to $500,000: 400x = 500,000 → x = $1,250. So A-rated raise = 2x = $2,500? Wait—recalculate: 50×2x = 100x, 100×1.5x = 150x, 150×x = 150x; total = 400x = $500,000 → x = $1,250. Then A-rated = 2x = $2,500. But that's option E. However, double-check: 400x = 500,000 → x = 1,250. So A = $2,500 (E). But existing answer says C ($740), which is inconsistent. Let's recompute carefully: 50×2x = 100x, 100×1.5x = 150x, 150×x = 150x → total = 400x = 500,000 → x = 1,250. So A = $2,500 (E). The existing answer C is incorrect.
🧪 AP Chemistry Medium
Choose the gas that probably shows the greatest deviation from ideal gas behavior under a given set of conditions.
  1. A. He
  2. B. O _{2}
  3. C. SF _{4} ✓
  4. D. SiH _{4}
Explanation: C —Deviations from ideal behavior depend on the size of the molecules and the intermolecular forces between the molecules. The greatest deviation would be for a large polar molecule. Sulfur tetrafluoride is the largest molecule listed, and it is the only polar molecule listed.
🧬 AP Biology Medium
Another type of mutation causes reduced levels of protein production. Which of the following medications would be effective?
  1. A. a drug that keeps the gate on the CFTR ion channel open for longer periods of time ✓
  2. B. a drug that suppresses expression of the CFTR gene
  3. C. a drug that decreases the number of chloride ions exiting the cell
  4. D. a drug that stimulates the Na ^{+} /K ^{+} pump in the cell membrane
Explanation: Since there would be fewer copies of the CFTR protein, a drug that causes the CFTR channel to stay open and function longer might help alleviate the symptoms of the disease. Choice (B) is incorrect because suppression of the expression of the CFTR gene would make the symptoms worse, not better. Similarly, decreasing the number of chloride ions exiting the cell would also make the symptoms worse, so choice (C) is incorrect. Stimulating the Na ^{+} /K ^{+} pump would not help with the migration of chloride ions, so choice (D) is incorrect.
✍️ AP English Language Hard
Which of the following best describes the exigence of the fourth paragraph (lines 19–30)?
  1. A. To describe the appeal of history over the ages ✓
  2. B. To define the benefits of knowing about the past
  3. C. To stress the unpredictability of human events
  4. D. To highlight the vast sweep of history
  5. E. To pinpoint reasons why history needs to be studied
Explanation: The speaker is supporting his claim that studying history can be spectacularly enjoyable.

💡 Study Tips

🎯 Use process of elimination on science questions

On AP and standardized science sections, you can often eliminate choices by checking units, order of magnitude, or whether the answer makes physical sense — even before doing the full calculation.

🎯 Read the question before the passage

On reading-heavy sections like the ACT and AP English exams, skim the questions first. Knowing what you're looking for turns passive reading into active searching, saving time and improving accuracy.

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