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enter image description here

Im almost about to give up with this, So my answers were 1311 and 1221, but both are wrong, can't manage to see other logical solution hehe.

first one is because I though it was sequence where you add 1 after placing ones on the sides, but its not correct, second answer is because I replaced 11 for 21, but also wrong, any ideas?

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    $\begingroup$ This is a pretty well known puzzle, one that it doesn't seem like you created. Can you specify where you found it? $\endgroup$
    – PartyHatPanda
    Commented Mar 24, 2020 at 20:26
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    $\begingroup$ @PartyHatPanda I saw it on an instagram history and its been on my head since yesterday lol $\endgroup$
    – BugsForBreakfast
    Commented Mar 24, 2020 at 20:27
  • $\begingroup$ I don't know the procedure on best practices to answer questions that were not created by the user... moderators, thoughts? $\endgroup$
    – PartyHatPanda
    Commented Mar 24, 2020 at 20:30
  • $\begingroup$ @PartyHatPanda Ah, you found it! Well, I've already answered now :-/ and can't delete my answer as it's accepted. $\endgroup$
    – Rand al'Thor
    Commented Mar 24, 2020 at 20:46
  • $\begingroup$ You can find this on the OEIS $\endgroup$
    – user65687
    Commented Mar 25, 2020 at 11:33

1 Answer 1

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The next one is

111221

because each line is

describing the line before it.

Read it like this:

1
11 (one one)
21 (two ones)
1211 (one two, one one)
111221 (one one, one two, two ones)
...

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    $\begingroup$ @MacGyver88 If you're good with things that don't match, I won't recommend you to these puzzles :-) $\endgroup$
    – Rand al'Thor
    Commented Mar 24, 2020 at 22:13
  • $\begingroup$ Good one....... $\endgroup$
    – MacGyver88
    Commented Mar 24, 2020 at 22:16

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