Which is the odd one out?
- A.10
- B.15
- C.20
- D.23 ✓
Explanation: 10, 15, and 20 are multiples of 5; 23 is not.
Class 6 IMO Mathematics Olympiad practice · Patterns & Sequences · Odd-One-Out & Classification
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Class 6 IMO Mathematics Olympiad practice · Patterns & Sequences · Odd-One-Out & Classification
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