Question 6
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How many 3-digit odd numbers have all their digits different?
- A 360
- B 450
- C 405
- D 320 Correct
Correct Answer: Option D
Last digit odd: 5 ways
First digit: not 0 and not the last → 8
Middle: 8 left
5 × 8 × 8 = 320
Trap: 360 lets 0 lead.
Answer: 320
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