Which one of the following is the smallest 5-digit number?

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01000

10,000

00,001

99999

answer is B.

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Detailed Solution

We get the smallest 5-digit number when we add one to the largest 4-digit number.
The largest 4-digit number is: 9999
By adding 1 to 9999, we get:
9999 + 1 = 10,000

Hence, the smallest 5-digit number is 10,000.

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