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Math Help - Find the Sum

  1. #1
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    Find the Sum

    Find the sum of all the distinct 4-digit numbers that have the property that their digits are among {1, 2, 3, 4, 5} and no digits appears twice in the same number.
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  2. #2
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    Well, we know that 1 is going to appear in the thousands place 4*3*2 times. I'll leave the hint there. If you still struggle with it, let me know.
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  3. #3
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    Okay so I should go through each number 1-5 to try and multiply them together to give me the answer? I honestly am not sure where to go with this still..... Thank you for your help. It is greatly appreciated!
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