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Using the digits 0, 1, 2, 3, 5, 7, 9 once each, the smallest 7-digit number is:

A10,25,379
B10,23,597
C12,03,579
D10,23,579
Answer & Solution
Correct answer: D. 10,23,579
A 7-digit number cannot start with 0, so start with 1, then 0, 2, 3, 5, 7, 9, giving 10,23,579.
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