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Question

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

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B

7173

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C

7359

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D

8659

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Solution

The correct option is B

7173


Find the greatest and smallest and their differences:

The given digits are 5,2,9,7.

A condition is given that each digit can be used only once while forming numbers.

So, the greatest number =9752

And, the smallest number =2579

Now, the difference between the greatest and the smallest number formed using the digits using 5,2,9,7 can be calculated as,

The required difference = greatest number - smallest number

the required difference =9752-2579

the required difference =7173

Hence, option B is the correct option.


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