Question 40
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How many positive integers below 1,000 contain no digit 0?
- A 729
- B 999
- C 900
- D 819 Correct
Correct Answer: Option D
1-digit: 9; 2-digit: 9 × 9 = 81; 3-digit: 9³ = 729
Total = 819
Trap: 729 counts only 3-digit numbers.
Answer: 819
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