SAT Math Multiple Choice Question 103: Answer and Explanation
13. If (i413)(ix) = 1, then what is one possible value of x ?
- A. 0
- B. 1
- C. 2
- D. 3
Correct Answer: D
Dia = 1 when a is a multiple of 4. Using your exponents rules, 413 + x must also be a multiple of 4. Plug in the answers and look for what makes 413 + x a multiple of 4. Only (D) works.