Each of the digits in the number 1538673 is arranged in ascending order from left to right. What will be the sum of the digits which are second from the left and third from the right in the new number thus formed?

This question is based on the five, three-digit numbers given below. (Left) 475 326 157 761 829 (Right) If all the numbers are arranged in ascending order from left to right, the position of how many numbers will remain unchanged?

This question is based on the five, three-digit numbers given below. (Left) 426 125 357 489 627 (Right) If all the numbers are arranged in ascending order, the position(s) of how many numbers will remain unchanged?