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How Many Numbers Can Be Formed Using a Certain Number of Digits?

What is the d...

Question

What is the difference between the largest 4 digit number and the smallest 4 digit number that can be formed using the digits 9, 7, 7, 0, and 3?

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Solution

The largest 4-digit number that can be formed using the digits
9, 7, 7, 0, and 3 is 9773 and the smallest 4-digit number that can be formed is 3077.

The difference between these two numbers = 9773 - 3077 = 6696.

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