SAT Math Multiple Choice Question 285: Answer and Explanation

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Test Information

Question: 285

15. Which of the following represents as an integer?

  • A. 4
  • B. 12
  • C. 48
  • D. 64

Correct Answer: D



Difficulty: Hard

Category: Passport to Advanced Math / Exponents

Strategic Advice: Because this is a non-calculator question, you need to rewrite the exponent in a way that makes it easier to evaluate. Unit fractions, as exponents, are easy to evaluate because they can be rewritten as radicals.

Getting to the Answer: Use the rules of exponents to rewrite as a unit fraction raised to a power. Then write the expression in radical form and simplify.

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