Frame the number that has the digit $\text{'}6\text{'}$ in its crores, lakhs, thousands and hundreds places.The rest of the digits are three. 

Make the smallest $6$-digit number using the digits $5, 2, 8,$and $7$.

Mark the correct alternative in the following.

The largest $5-$digit number using any one digit twice from digits $6, 8, 3, 1$is:

Use all the digits only once and form the smallest $6$-digit number.

$5, 1, 6, 3, 8, 9$

Make the smallest $6$-digit number by using the digits $1, 6, 3, 5, 0, 7$ only once.

 Use all the digits only once and form the smallest $6$-digit number.

$4, 1, 7, 3, 5, 2$