Find the smallest 7-digit number which can be formed using the given digits with repeating any one digit twice. 6, 2, 0, 9​, 1, 4

1. 62009​14
2. 1002469
3. 009​1264
4. 2009​146

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

Using the given digits write the smallest and the greatest $5-\mathrm{digit}$ numbers. You repeat any one digit twice.

$4,3,2,6$.

What is the smallest four-digit number which can be formed using the given digits repeating only one digit twice?
9, 4, 0