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    cosmos31's Avatar
    cosmos31 Posts: 1, Reputation: 1
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    #1

    Apr 28, 2010, 01:56 AM
    1,2,6,15,31,56
    Find the sequence:1,2,6,15,31,56
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Apr 28, 2010, 08:37 AM

    Hint: This is a progression that requires addition.

    Can you solve it now? Post what you did.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Apr 28, 2010, 02:15 PM

    If you look at the differences between each pair of numbers in the sequence you should recognize a pattern.
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    jondeo Posts: 1, Reputation: 1
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    #4

    Feb 8, 2012, 12:26 AM
    1+1^1, 2+2^2, 6+3^2, 15+4^2, 31+5^2, 56+6^2...
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