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There are many four-digit positive integers in which the product of the digits is equal to \(5!\). What is the sum of the largest and smallest such four-digit numbers?

 Jun 11, 2020
 #1
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The smallest 4-digit number =1,358

The largest 4-digit number    =8,531

 Jun 11, 2020
 #2
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Thanks a lot! 

So the answer would be \(9889\) 

amazingxin777  Jun 11, 2020

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