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What is the smallest 8-digit number that uses 8 different digits?

A1,02,34,567
B1,23,45,678
C1,00,00,000
D1,02,34,576
Answer & Solution
Correct answer: A. 1,02,34,567
Start with 1 as the lead digit, then use the smallest unused digits 0, 2, 3, 4, 5, 6, 7 in order, giving 1,02,34,567.
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