Daily Practice Questions

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

📝 Questions

📝 ACT Prep Medium
Point B(4,3) is the midpoint of line segment AC. If point A has coordinates (0,1), then what are the coordinates of point C?
  1. A. (–4, –1)
  2. B. (4, 1)
  3. C. (4, 4)
  4. D. (8, 5) ✓
  5. E. (8, 9)
Explanation: Using the midpoint formula, if B(4,3) is the midpoint of AC and A(0,1) is one endpoint, then the coordinates of C can be found by using the midpoint formula. The midpoint formula is ((x1 + x2)/2, (y1 + y2)/2). So, (4,3) = ((0 + x2)/2, (1 + y2)/2). Solving for x2 and y2 gives x2 = 8 and y2 = 5. Therefore, C is (8, 5).
🧪 AP Chemistry Medium
Choose the reaction expected to have the greatest decrease in entropy.
  1. A. C(s) + CO _{2} (g) → 2 CO(g)
  2. B. 2 Na(s) + O _{2} (g) → Na _{2} O _{2} (s) ✓
  3. C. CH _{4} (g) + 2 O _{2} (g) → CO _{2} (g) + 2 H _{2} O(g)
  4. D. 2 NI _{3} (s) → 3 I _{2} (s) + N _{2} (g)
Explanation: B —In general, gases have much higher entropy than either liquids or solids. For this reason, the predictions depend primarily upon which reaction results in the greatest decrease in the number of moles of gas. A and D both result in an increase in the number of moles of gas, so there is an increase in entropy. C shows no change in the number of moles of gas; therefore, the change in entropy will be small.
📖 SAT Reading & Writing Hard
What equation represents the relationship between mass, m , and volume, v , in the above graph?
  1. A. v = 3 m
  2. B. m = 3 v ✓
  3. C. m = 6 v
  4. D. v = m + 2
Explanation: No matter how you choose to season your food, salt and pepper are recommended items to have on a dinner table.
💻 AP Computer Science A Easy
If the test for the while loop is changed to
  1. A. 4 ✓
  2. B. 7
  3. C. 11
  4. D. 24
  5. E. 30
Explanation: Try 4. Here are the values for low, high, and mid when searching for 4: Initially, low=0, high=9, mid=4. Since arr[4] equals 4, the loop terminates immediately, returning 4. This demonstrates binary search efficiency, where each step halves the search space. If you tried 7, the loop would continue because arr[4] < 7, leading to further iterations. The key is that the test condition checks if the middle element matches the target, causing an early exit when found.
✍️ AP English Language Hard
To provide additional information, the writer may want to add the following sentence to the discussion in either the fifth or the sixth paragraph (lines 36–46).
  1. A. Before sentence 32
  2. B. After sentence 32, but not in the next paragraph
  3. C. In the new paragraph after sentence 32 ✓
  4. D. After sentence 33
  5. E. After sentence 34
Explanation: The sentence serves as a detail that follows the claim that new music was being heard “around the country.” The next paragraph also discusses music heard elsewhere, although its focus is on Chicago.
🧬 AP Biology Easy
What is the expected frequency of the heterozygotes 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 and genotype frequencies remain constant in a large, randomly mating population without evolutionary forces. Since the problem implies no selection or drift, the heterozygote frequency ($2pq$) calculated from the initial generation remains unchanged in subsequent generations; therefore, the expected frequency after three generations is identical to the initial value of 0.494. Choices like 0.800 likely represent a misunderstanding of how allele frequencies sum to one, while other incorrect values result from miscalculating $2pq$ or assuming evolution occurs when none is indicated.

💡 Study Tips

📖 Write your own practice questions

Creating your own quiz questions forces you to think about what's important and how concepts connect. It's a powerful form of active learning that goes beyond highlighting and re-reading.

🎯 Eliminate before you guess

On multiple-choice questions, crossing out answers you know are wrong before guessing dramatically improves your odds. Even eliminating one option on a four-choice question raises your chance from 25% to about 33%.

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