Daily Practice Questions

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

📝 Questions

🧪 AP Chemistry Medium
Which of the following is a possible configuration for a transition metal ion?
  1. A. 1s ^{2} 1p ^{6} 2s ^{2} 2p ^{3}
  2. B. 1s ^{2} 2s ^{2} 2p ^{6} 3s ^{2} 3p ^{6} 4s ^{2} 3d ^{10} 4p ^{6} 5s ^{2} 4d ^{1}
  3. C. 1s ^{2} 2s ^{2} 2p ^{6} 3s ^{2} 3p ^{6} 3d ^{3} ✓
  4. D. 1s ^{2} 2s ^{2} 2p ^{5}
Explanation: C —The outer s-electrons are not present in most transition metal ions; however, d electrons may be present. C could be V ^{2+} , Cr ^{3+} , or Mn ^{4+} (among other choices). B is a Y atom.
📖 SAT Reading & Writing Medium
What is the sum of the following polynomials?
  1. A. 30 x ^{6} + x ^{3} − x + 1
  2. B. 30 x ^{3} + 2 x ^{2} + x − 1
  3. C. 11 x ^{3} + x ^{2} − x + 1 ✓
  4. D. 11 x ^{3} − x ^{2} + x − 1
Explanation: To find the sum, combine like terms by adding coefficients for matching powers of $x$. The $x^3$ terms yield $11x^3$, the $x^2$ terms result in $x^2$, the $x$ terms simplify to $-x$, and the constants sum to $1$. This produces $11x^3 + x^2 - x + 1$. Option D fails because it incorrectly flips the signs of the $x^2$ and $x$ terms, a common error when subtracting polynomials instead of adding them.
📊 SAT Math Hard
5. The given scatterplot shows the height of a diver above the water. Which of the following equations best describes the data in the scatterplot?
  1. A. y = −5.294 x ^{2} + 10.718 x + 3.5
  2. B. y = −5.294 x ^{2} + 10.718 x + 27.438 ✓
  3. C. y = 5.294 x ^{2} + 10.718 x + 3.5
  4. D. y = 5.294 x ^{2} + 10.718 x + 27.438
Explanation: Getting to the Answer: The shape of the data is a downward opening parabola. For a quadratic in the form ax ^{2} + bx + c , c is the y -intercept, and the parabola opens downward when a < 0. Thus, the coefficient in front of x ^{2} is negative. Eliminate (C) and (D). According to the scatterplot, the y -intercept falls between positive 25 and 30, so (B) is correct. Note that 3.5 is the x -intercept.
📝 ACT Prep Hard
Which of the following sequence of sentences will make the paragraph most logical?
  1. A. NO CHANGE
  2. B. 2, 3, 1, 4
  3. C. 4, 3, 2, 1
  4. D. 4, 1, 2, 3 ✓
Explanation: Use POE. The surgery isn't properly introduced until the end, which means Sentence 4 should be the introduction. Eliminate (F) and (G), and determine whether Sentence 3 or 1 should be next. Sentence 1 should come before Sentence 3 because Sentence 1 happens before the surgery and Sentence 3 is on the day of the surgery, so the answer is (J).
⚛️ AP Physics C Medium
A constant horizontal force F applied to a block on an incline causes the block to move a distance d along the incline, as shown. If the coefficient of friction between the block and the incline is μ _{k} , what is the work done by the applied force? (Do not assume that the block moves at constant velocity.)
  1. A. W = Fd sin θ
  2. B. W = Fd cos θ
  3. C. W = mgd sin θ
  4. D. W = mgd sin θ − μ _{k} mgd cos θ
  5. E. W = mgd sin θ + μ _{k} d ( mg cos θ + F sin θ ) ✓
Explanation: The work done by the applied force $F$ is defined as the product of the force magnitude, displacement distance $d$, and the cosine of the angle between them; however, choice (E) represents the *total* work required to overcome gravity and friction rather than just the mechanical definition $W = Fd \cos\theta$. Specifically, the total work input must equal the sum of the work done against gravity ($mgd \sin\theta$) and the work done against kinetic friction ($f_k d = \mu_k N d$), where the normal force $N$ is the sum of the perpendicular components of weight and the applied force ($N = mg \cos\theta + F \sin\theta$). Therefore, choice (E) correctly expresses the total energy input needed to move the block up the incline against both gravitational potential energy changes and frictional losses.
✍️ AP English Language Medium
Which of the following best describes the writer’s exigence in the passage?
  1. A. The mixed messages that Walden sends to young readers
  2. B. Thoughtful commentary on how to live a productive and satisfying life ✓
  3. C. The need for universal truths
  4. D. The serenity and grandeur that can be found in nature
  5. E. The dictum that to understand the world one must retreat from it
Explanation: The writer touts the advantages of encountering Walden during one’s youth (lines 8–29), for it gives a “good argument for traveling light and trying new adventures,” among many other things.

💡 Study Tips

💚 Stay hydrated during study sessions

Even mild dehydration can reduce concentration and short-term memory. Keep a water bottle at your desk and take a sip during each break. Your brain is mostly water — it needs fuel to perform.

🎯 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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