A number is divisible by 3 but not by 6. Which statement must be true?
- A.The number is even
- B.The number is divisible by 6
- C.The number is divisible by 2
- D.The number is odd ✓
Explanation: Divisible by 6 requires divisibility by both 2 and 3. If it's divisible by 3 but not 6, it can't be divisible by 2 — so it must be odd.
Class 6 IMO Mathematics Olympiad practice · HOTS / Achievers · Multi-Concept Achievers
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