A friend of mine gave me this number puzzling but I have no idea what is the logic.

Does anyone know how to solve?

  • 2
    $\begingroup$ I removed the logical-deduction tag (I'm 90% certain that this does NOT involve formal logic), and I thought about adding the number-sequence tag, but I wanted to check with you first on that one. $\endgroup$
    – Brandon_J
    Commented Mar 9, 2019 at 17:13

1 Answer 1


The first number is

The date the question was posted.


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