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Digital SAT practice questions

211 free questions with answers and explanations.

Practice test
  1. 201.A student is writing a research paper on the advancements in quantum computing. She has just detailed the theoretical breakthroughs in qubit stability. She now wants to explain the practical challenges of scaling these systems, emphasizing that despite the theoretical progress, significant hurdles remain. Which transition best captures this relationship?Reading and Writing: Expression of Ideas
  2. 202.A technician is calibrating a pressure sensor. The sensor's reading, R, in kilopascals (kPa), is related to the actual pressure, P, in kPa, by the equation R = 1.05P + 3. If the sensor reads 129 kPa, what is the actual pressure?Math: Algebra
  3. 203.A city planner is designing a park. A rectangular section of the park has a perimeter of 120 meters. If the length of this section is 10 meters more than its width, what is the width of the rectangular section?Math: Algebra
  4. 204.A biologist is observing the growth of a bacterial colony. The colony's population, P(t), in thousands, after t hours, can be modeled by the function P(t) = 5 * 2^(t/3). What is the population of the colony after 9 hours?Math: Algebra
  5. 205.A park ranger is monitoring the population of a certain species of bird. The population, P(t), after t years can be modeled by the equation P(t) = 1500 / (1 + 4e^(-0.5t)). What is the carrying capacity of this bird population?Math: Algebra
  6. 206.A carpenter is building a wooden frame for a window. The frame is rectangular, with a width of 30 inches and a height of 40 inches. To ensure the frame is perfectly square, the carpenter measures the diagonal. What should be the length of the diagonal?Math: Geometry and Trigonometry
  7. 207.A historian is describing the strategic importance of ancient trade routes. She wants to emphasize that these routes were not merely economic arteries but also crucial conduits for cultural exchange and technological diffusion. Which phrase most effectively conveys this dual role?Reading and Writing: Expression of Ideas
  8. 208.A botanist is studying the growth of a particular vine. The length of the vine, L, in centimeters, can be modeled by the equation L = 3t + 15, where t is the number of days after planting. What is the meaning of the number 15 in this equation?Math: Algebra
  9. 209.A scientist is studying a chemical reaction where the rate of reaction, R, is inversely proportional to the square of the concentration of one reactant, C. If the rate of reaction is 0.05 M/s when the concentration is 0.2 M, what is the rate of reaction when the concentration is 0.5 M?Math: Algebra
  10. 210.A literary critic is analyzing a novel where the protagonist frequently describes their surroundings as if they possess human qualities. For example, a 'grumbling sky' or 'trees whispering secrets.' Which literary device is the author primarily employing?Reading and Writing: Craft and Structure
  11. 211.A student is writing an essay about the ethical implications of genetic engineering. She has just discussed the potential for curing hereditary diseases. She now wants to introduce the argument that genetic engineering could also lead to unintended consequences, such as altering human diversity. Which transition best introduces this warning or potential negative outcome?Reading and Writing: Expression of Ideas