SAT Math Multiple Choice Practice Question 437: Answer and Explanation

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Question: 437

20. When k is subtracted from 10, and the difference is divided by 2, the result is 3. What is the value of k ?

A. 3
B. 4
C. 6
D. 10
E. 16

Correct Answer: B


B The best way to approach this problem is to plug in the answers. Start with C. When 6 is subtracted from 10, the result is 4. Divide 4 by 2 to see if it equals 3. It does not, so C can't be correct. Because our answer was too small, you need to subtract a smaller number from 10. Try B. When 4 is subtracted from 10, the result is 6. Divide by 2 to get 3; this is correct.

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