Form the greatest and smallest numbers using the digits 5, 2, 9, 7 (each digit is used only once). What is the difference between the two numbers formed? (A) 6853 (B) 7173 (C) 7359 (D) 8659

Given digits are 5, 2, 9, 7

The greatest number is obtained by arranging the digits in descending order as shown below

Greatest number = 9752

The smallest number is obtained by arranging the digits in ascending order as shown below

Smallest number = 2579

Difference of the greatest number and the smallest number is

Difference = 9752 – 2579

We get,

Difference = 7173

Therefore, the difference of the greatest number and the smallest number is 7173

So, the correct option is (B)

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