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1. What row of numbers comes next in this series? 1 11 21 1211 111221 312211 13112221

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I've seen this somewhere before, but I still do not understand the pattern here...
  • phi
It looks like writing down a "word description" 1 I would say this is "one 1" --> 11 11 I would say two ones -> 21 21 one 2 one 1 1211 1211 one 1 one 2 two 1's 111221

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Other answers:

@phi :your right ...
@experimentX :your extremly close the right answer is 1113213211 .
But @experimentX U got it by sequence or by what ?
same technique as phi ... i have seen that before and i never make same mistake twice
Oh ... i got mistake!! LOL
LOL ,Good job anyway xD..U should not mistake triple :P
Oh sure ..

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