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The first term of an arithmetic sequence is 1, another term of the sequence is 91 and all of the terms of the sequence are integers. How many distinct arithmetic sequences meet these three conditions?

 Apr 14, 2020
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Ya gotta get from 1 to 91    a difference of 90   by adding successive integers   like   1  2   3  4  5  6  9  10 15  18  30 45   90 

    13 ways      do you see any i missed?

 Apr 14, 2020

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