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What is the smallest number of five digits formed by using the digits 2, 4, 0, 3, 5 ?

Solution

Correct Option: 2

Using digits 2, 4, 0, 3, 5, the smallest 5-digit number cannot begin with 0 (it would become 4-digit). So start with the smallest non-zero digit 2, then arrange remaining digits in ascending order: 2, 0, 3, 4, 5 \to 20345.

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