Daily Practice Questions

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

📝 Questions

📝 ACT Prep Hard
After the thumping music started. The bird began to dance.
  1. A. NO CHANGE
  2. B. started, the bird began,
  3. C. started; the bird began
  4. D. started, the bird began ✓
Explanation: Using Steps 3 and 4, we can use the context of the rest of the sentence to confirm that we don't need the second comma that (B) offers. Choice (D) is the correct answer.
🧪 AP Chemistry Hard
Would it be possible to use this procedure to determine the percent of sulfur (as sulfur dioxide) in the dog food?
  1. A. Yes, because sulfur dioxide is volatile.
  2. B. No, because sulfur dioxide is not volatile.
  3. C. Yes, because sulfur dioxide is a base like ammonia.
  4. D. No, because sulfur dioxide is not a base like ammonia. ✓
Explanation: D —The procedure works because the gas (ammonia) is a base that will react with the acid. Sulfur dioxide is an acidic oxide; therefore, it will neither react with nor be trapped by the dilute acid.
🎯 GMAT Prep Easy
Tech industry employee benefits, as with other industries, were designed to increase the number of hours employees spend at work and to help attract top talent.
  1. A. as with ✓
  2. B. as did those of
  3. C. as they have in
  4. D. like in
  5. E. like those of
Explanation: Option A is correct because 'as with' is the proper idiom for comparing two similar situations. It introduces a comparison between tech industry employee benefits and those of other industries in a concise and grammatically correct way.
🧬 AP Biology Easy
The frequency of a recessive phenotype in a population is 20%. What will be the frequency of the recessive allele after three generations?
  1. A. 0.200
  2. B. 0.447 ✓
  3. C. 0.494
  4. D. 0.800
Explanation: This question tests the Hardy-Weinberg principle, which states that allele frequencies remain constant in a population unless acted upon by evolutionary forces like selection or drift; since no such forces are mentioned, the frequency of the recessive allele ($q$) stays the same across generations. First, calculate $q$ using the given phenotype frequency: if 20% of the population shows the recessive trait, then $q^2 = 0.20$, meaning $q = \sqrt{0.20} \approx 0.447$. Because the population is assumed to be in equilibrium, this allele frequency does not change after three generations, making (B) the correct answer while (A), (C), and (D) represent incorrect calculations or assumptions about changing frequencies.
📊 SAT Math Medium
Which choice completes the text so that it conforms to the conventions of Standard English? Music is a combination of specific sound waves started and stopped at specific times. Some waves align nicely with one another or contrast nicely with one another, ___________ others are neither regularly contrasting nor matching.
  1. A. from the two mens’ works directly derive.
  2. B. from the works of these two men directly derive.
  3. C. derive directly from the works of these two men. ✓
  4. D. come directly from this.
Explanation: The sentence requires an independent clause to complete the compound structure, making "derive directly from the works of these two men" the only grammatically correct choice because it provides a proper subject and verb. Options A and B are incorrect due to awkward phrasing and unnecessary possessive forms ("mens'"), while option D is too vague by failing to specify whose works are being referenced. This question tests your ability to identify complete clauses and ensure logical consistency within a sentence.
📖 SAT Reading & Writing Medium
Which choice completes the text so that it conforms to the conventions of Standard English? Schrödinger posited the issue of when superposition collapses into reality—when multiple occupying states simultaneously _________ one or the other.
  1. A. serval’s diet. ✓
  2. B. servals diets.
  3. C. servals’ diet.
  4. D. serval’s diets’.
Explanation: Choice (A) uses the apostrophe to show that the singular serval possesses its diet. “Serval” must be singular since the word “a” precedes it. Choice (B) does not show possession, and (C) and (D) inappropriately use plural apostrophes on servals’ and diets’ respectively.

💡 Study Tips

🎯 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.

🎯 Know the test format before test day

Familiarize yourself with the exact structure, timing, and question types of your exam. Knowing how many questions per section and how much time you have removes anxiety and lets you plan your pacing.

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