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    flo32's Avatar
    flo32 Posts: 1, Reputation: 1
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    #1

    Mar 7, 2013, 05:30 PM
    Math question
    The Timbuktu post office has only 3 cents and 7 cents stamps having run out of all other denominations. What are the six amounts of postage that cannot be created? How do you know there are only 6
    teacherjenn4's Avatar
    teacherjenn4 Posts: 4,005, Reputation: 468
    Education Expert
    		  
    #2

    Mar 7, 2013, 07:35 PM
    What have you figured out so far?
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