Find the difference between the greatest and the least number that can be written using the digits 6, 2, 7, 4, 3 each only once.

Find the difference between the greatest and least numbers that can be written using the digits 6, 2, 7, 4, 3 each only once.

Find the difference between the greatest and least numbers that can be written using the digits 6, 2, 7, 4, 3 each only once.

Find the difference between the greatest and the least 5-digit number that can be written using the digits 6, 2, 7, 4, 3 each only once.

Find the difference between the greatest and the smallest four-digit numbers formed by using all the digits 8, 6, 7 and 4.

Write the greatest and the smallest numbers of 4 digits that can be formed using the digits 0, 8, 7, 5; using each digit only once.

Write the greatest and the smallest numbers of 4 digits that can be formed using the digits 0, 8, 7, 5; using each digit only once.

Find the difference between the greatest 5-digit number and the greatest 4-digit number formed using the digits 7, 6, 2, 5, 1 when the repetition is not allowed.