When a positive integer x is divided by 5, the remainder is 3. What is the remainder when 3x is divided by 5?
✓ Correct Answer: Option D
If x = 5k + 3 for some integer k, then 3x = 3(5k + 3) = 15k + 9. Dividing 15k by 5 gives a remainder of 0. Dividing 9 by 5 gives a remainder of 4. Thus, the remainder for 3x divided by 5 is 4.
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This 2-level GMAT Exam Prep question from the Quantitative Reasoning topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
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