Using the digits 1, 2, 3 and 4 without repetition, how many three-digit even numbers can be formed?
- A.6
- B.8
- C.10
- D.12 ✓
Explanation: The last digit must be 2 or 4 (2 choices). The remaining two positions are filled from the other 3 digits in 3×2=6 ways. Total = 2×6 = 12.
Class 6 IMO Mathematics Olympiad practice · HOTS / Achievers · Multi-Concept Achievers
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