Question

Form the smallest $6-$digit number using the digits $1,0,5,3,7$ and $9$ without repeating the digits.

Answer 1

For forming smallest $6-$digit number using the above digits just arrange all the digits in ascending order but if we arrange $0$ as first digit then it will became $5-$digit number. So, we use $1$ as first digit and after that all digits are arranged in ascending order.

Hence, the smallest $6-$digit number using the digits $1,0,5,3,7$ and $9$ without repeating the digits is $1,03,579$.