Choose the odd number: Three of the numbers are exact multiples of 17; one is not. Identify the number that is not divisible by 17.
Verbal Reasoning
Classification
Difficulty: Easy
Choose an option
-
A68
-
B88
-
C102
-
D238
-
ENone of these
Answer
Correct Answer: 88
Explanation
Introduction / Context:This classification focuses on a specific divisor (17). The outlier is the one not divisible by 17.
Given Data / Assumptions:
- Candidates: 68, 88, 102, 238.
- Recall: 17 * 4 = 68; 17 * 6 = 102; 17 * 14 = 238.
Concept / Approach:Check division by 17 using simple multiples or quick arithmetic.
Step-by-Step Solution:
68 = 17 * 4 → divisible.102 = 17 * 6 → divisible.238 = 17 * 14 → divisible.88 ÷ 17 ≈ 5.176… → not divisible.Verification / Alternative check:Multiply back: 17 * 5 = 85 and 17 * 6 = 102; 88 is between these and hence not a multiple.
Why Other Options Are Wrong:They are exact multiples of 17 and follow the majority rule.
Common Pitfalls:Relying on rough estimation without confirming adjacent multiples (85 and 102).
Final Answer:88 is not divisible by 17 and is the odd number.