Question 8
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How many 3-digit numbers can be formed from the digits 1 to 9 if no digit is repeated?
- A 729
- B 504 Correct
- C 84
- D 720
Correct Answer: Option B
9 × 8 × 7 = 504
Trap: 729 allows repeats; 84 only chooses the digits.
Answer: 504
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