Question
Write the largest $7-$digit number that ends with $1$ and the smallest $7-$digit number that ends with $2,$ using the digits $7, 8, 9, 2, 0, 1, 4$ without repeating any digit.
What number should be added to the sum of the above two numbers to make it $1,25,42,179?$
What number should be added to the sum of the above two numbers to make it $1,25,42,179?$