Daily Practice Questions

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

📝 Questions

🧪 AP Chemistry Medium
The temperature increases when lithium sulfate, Li _{2} SO _{4} , dissolves in water. Which of the following conclusions may be related to this?
  1. A. Lithium sulfate is less soluble in hot water. ✓
  2. B. The hydration energies of lithium ions and sulfate ions are very low.
  3. C. The heat of solution for lithium sulfate is endothermic.
  4. D. Lithium sulfate solutions are not ideal solutions.
Explanation: A —The increase in temperature of the solution indicates that the process is exothermic. An exothermic process will shift toward the starting materials (solid lithium sulfate and water) when heated.
📖 SAT Reading & Writing Medium
The student wants to highlight two pumpkin varieties that can be consumed as food. Which choice most effectively uses relevant information from the notes to accomplish this goal? While researching a topic, a student has taken the following notes:
  1. A. Blue, white, and orange pumpkins will often be found on the dinner table.
  2. B. Jarrahdale and Cinderella pumpkins are considered delicacies.
  3. C. Both Porcelain Doll and Casperita pumpkins can be eaten. ✓
  4. D. Porcelain Doll pumpkins are considered the most delicious pumpkin varietal.
Explanation: Focus on the specific claim—the student wants to show that there are two pumpkin varieties that can be eaten. Based on the notes, Casperita pumpkins are “edible” and Porcelain Doll pumpkins are a “good choice for pumpkin pie,” implying that they too are edible. So, choice (C) is the most logical option. The other options refer to pumpkins in the notes that are not consistently referred to as being edible.
📝 ACT Prep Medium
What is sin θ, if tan θ = ?
  1. A.
  2. B. ✓
  3. C.
  4. D.
  5. E.
Explanation: It helps to sketch out the right triangle and fill in the information we know. What kind of right triangle is this? That’s right—a 3-4-5. Now, we need to know the sine of angle θ: opposite over hypotenuse, or , which is (B).
🎓 GRE Prep Easy
A bookstore will only order books that come in complete cases. Each case has 150 books and costs $1,757. Quantity A Quantity B The number of books that can be ordered for $10,550 The number of books that can be ordered for $12,290
  1. A. Quantity A is greater.
  2. B. Quantity B is greater. ✓
  3. C. The two quantities are equal.
  4. D. The relationship cannot be determined from the information given.
Explanation: Each case costs $1,757 and contains 150 books. For $10,550: floor(10550 / 1757) = 6 cases (since 6×1757=10,542), giving 6×150=900 books. For $12,290: floor(12290 / 1757) = 6 cases? Wait: 7×1757=12,299 >12,290, so only 6 cases → 900 books. But wait: 1757×6=10,542; 1757×7=12,299 which exceeds $12,290. So both give 6 cases → same number of books. But existing answer says B (Quantity B greater). Let's double-check: 1757×6=10,542; remainder $8 for first. 1757×6=10,542; remainder $748 for second. So both yield 6 cases = 900 books → quantities equal. But existing answer says B, which is incorrect. However, maybe miscalculation: 1757×6=10,542; 1757×7=12,299 >12,290 → yes. So correct answer is C (equal). But existing answer says B — mismatch.
🧬 AP Biology Easy
What is a role of the fox in this food web?
  1. A. producer
  2. B. primary consumer
  3. C. secondary consumer ✓
  4. D. tertiary consumer
Explanation: The fox acts as a secondary consumer because it feeds on primary consumers, such as rabbits or mice, which are herbivores that eat producers like plants. In this food web, the fox occupies the third trophic level, obtaining its energy by consuming organisms that have already consumed producers. Therefore, it is classified as a secondary consumer rather than a producer, primary consumer, or tertiary consumer.
🎯 GMAT Prep Hard
Based on the information in the passage, which of the following can be inferred about fearful responses to stress?
  1. A. Fearful responses to stress can be replaced with more rational responses if the person engages in a couple of hours of meditation per week.
  2. B. Fearful responses to stress occur more regularly in people with a thin prefrontal cortex.
  3. C. There is some debate over whether the research behind reducing fearful responses to stress should be considered science.
  4. D. Researchers believe that further study regarding fearful responses to stress and the relationship those responses have to mindfulness meditation is warranted. ✓
  5. E. Fearful responses to stress can be seen on an MRI scan.
Explanation: The passage indicates that while current research links mindfulness meditation to reduced fearful responses, the specific mechanisms and long-term effects require more investigation; therefore, it can be inferred that further study is warranted. Choices (A) and (E) are incorrect because they make definitive claims about replacing fear or visualizing it on an MRI that go beyond what the text explicitly supports, while (B) and (C) introduce unsupported details about prefrontal cortex thickness or scientific debate not mentioned in the passage.

💡 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.

📖 Space out your study sessions

Studying the same topic across multiple shorter sessions over several days leads to stronger long-term retention than cramming everything into one marathon session. Try 25-minute focused blocks with 5-minute breaks.

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