Find the odd number: Among 143, 171, 117, and 195, three are multiples of 13 while one is not. Identify the non-multiple of 13.
Verbal Reasoning
Classification
Difficulty: Easy
Choose an option
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A143
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B171
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C117
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D195
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ENone of these
Answer
Correct Answer: 171
Explanation
Introduction / Context:This classification tests recognition of multiples of 13. The single non-multiple is the outlier.
Given Data / Assumptions:
- 143 = 11 * 13; 117 = 9 * 13; 195 = 15 * 13.
- 171 is close to 13 * 13 = 169 but is not equal.
Concept / Approach:Compare each candidate with nearby products of 13.
Step-by-Step Solution:
143 → multiple of 13.117 → multiple of 13.195 → multiple of 13.171 → not a multiple of 13 (169 and 182 are the adjacent multiples).Verification / Alternative check:171 ÷ 13 ≈ 13.153… non-integer; hence not divisible by 13.
Why Other Options Are Wrong:They are exact multiples of 13.
Common Pitfalls:Confusing proximity (171 near 169) with exact divisibility.
Final Answer:171 is not a multiple of 13 and is the odd number.