Math CentralQuandaries & Queries


Question from Tom, a student:

There are 120 five-digit numbers that use all the digits 1 through 5 exactly once. What is the sum of these 120 numbers?


You have a stack of 120 numbers, each of which is a 5 digit number. I am going to give you one hint. The sum of the digits in each column is the same. Can you see why? Can you see how to complete the problem now?

If you need more assistance write back.


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