Question

Use the given digits without repetition and make the greatest and smallest 4-digit numbers.
2, 8, 7, 4

Answer 1

For making the greatest four-digit number using the given digits we have to place the digits in descending order.

Since, 8 > 7 > 4 > 2, the greatest four-digit number that can be formed is 8742.

For making the smallest four-digit number using the given digits we have to place the digits in ascending order.

Since, 2 < 4 < 7 < 8, the largest four-digit number that can be formed is 2478.