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What is the missing element in this series: 2, 5, 8, 11, [missing item goes here], 15, 19, 22, 30.


Note: This problem may not be mathematical. For a bonus, say where the series came from.

 

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Best Answer brettmw says

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4 years ago
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    Sid Kemp (SidKemp) 4 years ago

    You've got the right source. Find an older name for 13th street stop, which is not a number, and you'll have the answer, the stop as it was named in the 1970s. It's the street between 13th & City Hall. Warning, it's is on Google maps, but not nam


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calculus-geometry says

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4 years ago
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    Sid Kemp (SidKemp) 4 years ago

    2 hints: Don't assume the missing element is a number. Take a look at Philadelphia.