Which is the odd one out?
- A.2
- B.3
- C.5
- D.9 ✓
Explanation: 2, 3, and 5 are prime numbers; 9 = 3×3 is not.
Class 6 IMO Mathematics Olympiad practice · Patterns & Sequences · Odd-One-Out & Classification
← All Odd-One-Out & Classification questionsClass 6 · Olympiad Prep
Class 6 IMO Mathematics Olympiad practice · Patterns & Sequences · Odd-One-Out & Classification
← All Odd-One-Out & Classification questions