Daily Practice Questions

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

📝 Questions

🧪 AP Chemistry Easy
Which of the following choices ranks the molecules above in order of greatest to least polarity?
  1. A. B > D > C > A ✓
  2. B. D > B > C > A
  3. C. B > C > D > A
  4. D. C > B > D > A
Explanation: Molecule A is propane, a nonpolar hydrocarbon. The C-C bonds are nonpolar and C-H bonds are considered relatively nonpolar. Both of the central carbon atoms have a symmetric, tetrahedral geometry. There is nothing polar about this molecule!
🎓 GRE Prep Medium
Veteran technical support staff members feel that their services are ______ by the use of computer programs to do the same work; they claim that technical support can’t be provided procedurally but rather is a case-by-case effort that requires a skill set built upon training and experience.
  1. A. devalued ✓
  2. B. tarnished
  3. C. ridiculed
  4. D. vituperated
Explanation: The sentence states that veteran staff feel their services are diminished or made to seem less valuable due to computer programs performing the same work. 'Devalued' means reduced in worth or importance, which fits perfectly with their claim that technical support requires human skill and case-by-case judgment. The other options ('tarnished', 'ridiculed', 'vituperated') imply damage to reputation or harsh criticism, but the context emphasizes a loss of perceived value rather than personal attacks.
🧬 AP Biology Medium
Which of the following is a correct statement about meiosis?
  1. A. DNA replication occurs once, and there is one round of cell division.
  2. B. DNA replication occurs twice, and there is one round of cell division.
  3. C. DNA replication occurs once, and there are two rounds of cell division. ✓
  4. D. DNA replication occurs twice, and there are two rounds of cell division.
Explanation: Meiosis involves a single round of DNA replication followed by two consecutive rounds of nuclear and cytoplasmic division to produce four genetically unique haploid cells. In contrast, mitosis features one round of replication and one division, while options suggesting multiple replications do not occur in standard eukaryotic cell cycles. This specific sequence ensures that the resulting gametes contain half the original chromosome number while maintaining genetic diversity through crossing over and independent assortment.
📊 SAT Math Hard
14. The sum of the eight values in a data set is 40. If two additional values that total 20 are added to the data set, what is the change in the mean from the original data set?
  1. A. 1 ✓
  2. B. 2
  3. C. 3
  4. D. 5
Explanation: Getting to the Answer: The average formula is \text{average}=\frac{\text{sum of terms}}{\text{number of terms}}. Before the new values were added, the average was \frac{40}{8}=5. Adding two values that total 20 changes the average to \frac{40+20}{8+2}=\frac{60}{10}=6. Thus, the increase is 6 − 5 = 1, so (A) is correct.
📖 SAT Reading & Writing Medium
S(w) = 500 + 10w Ana receives an allowance of $10 per week. The function above shows how much money she will have in her savings account after w weeks, assuming she saves all her allowance in the account. What does the number 500 represent in the function?
  1. A. The money in her account at the beginning of the time period ✓
  2. B. The money in the account at the end of the time period
  3. C. The weekly increase in money in the account
  4. D. The net profit she receives after expenses
Explanation: In the function S ( w ) = 500 + 10 w , when zero weeks have gone by , the value of w will be 0. Plugging 0 into the function for w, the amount of money she will have in her savings account will be 500. This represents how much money she has in the account when no weeks have gone by, so it corresponds to choice (A), the money that is in her account at the beginning of the time period. Profit corresponds to revenue minus expenses, and the slope of 10 corresponds to the weekly increase in money in the account.
💻 AP Computer Science A Hard
Refer to method match below.
  1. A. v[0]…v[vIndex-1] and w[0]…w[wIndex-1] contain no common value, vIndex ≤ N and wIndex ≤ M . ✓
  2. B. v[0]…v[vIndex] and w[0]…w[wIndex] contain no common value, vIndex ≤ N and wIndex ≤ M .
  3. C. v[0]…v[vIndex-1] and w[0]…w[wIndex-1] contain no common value, vIndex ≤ N-1 and wIndex ≤ M-1 .
  4. D. v[0]…v[vIndex] and w[0]…w[wIndex] contain no common value, vIndex ≤ N-1 and wIndex ≤ M-1 .
  5. E. v[0]…v[N-1] and w[0]…w[M-1] contain no common value, vIndex ≤ N and wIndex ≤ M .
Explanation: Notice that either vIndex or wIndex is incremented at the end of the loop. This means that, when the loop is exited, the current values of v[vIndex] and w[wIndex] have not been compared. Therefore, you can only make an assertion for values v[0]..v[vIndex-1] and w[0]..w[wIndex-1] . Also, notice that if there is no common value in the arrays, the exiting condition for the while loop will be that the end of one of the arrays has been reached, namely vIndex equals N or wIndex equals M .

💡 Study Tips

📖 Use flashcards for active recall

Flashcards work because they force retrieval practice. For best results, shuffle them each session, separate cards you know well from ones you don't, and review the difficult pile more often.

💚 Don't multitask while studying

Switching between studying and your phone, social media, or TV fragments your attention and dramatically reduces what you retain. Put your phone in another room during focused study blocks.

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