Question 18
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How many 6-digit numbers have their digits in strictly increasing order from left to right?
- A 84 Correct
- B 504
- C 60,480
- D 126
Correct Answer: Option A
0 cannot appear (it would have to lead)
Choose 6 of 1–9; each choice gives one number: 9C6 = 84
Trap: 60,480 arranges them.
Answer: 84
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