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This was on my 5th grader's homework:

what is the least number you can make using all of the digits from 0 through 9 exactly once?

My answer was 1,023,456,789. The teacher says it's 0,123,456,789.

I think that if the zero is the first digit, it's not actually part of the number.


  • math -

    I agree with you.

  • math -

    i don't get it...

  • math -

    And I concur with Ms Sue.
    In our standard way of writing numbers, the lead digit cannot be a zero.

  • math -

    Thank you! Glad to know you agree with me.

    Does make me wonder, though, if other incorrect info is being given in class.

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