I’d like to ask the good people of this community that, if you do know the solution or figure it out, that you not share the answer here. Feel free to announce your success, but there’s something to be said for discovering the answer completely unaided, even if it takes years.
It’s embarrassingly obvious once you see it though.


Hah, took me nearly a minute.
Tap for spoiler
Add the digits on both sides.
? = 12
But I only got it so quickly because I enjoyed a similar puzzle once.
1
11
21
1211
111221
312211
…
continue the series.
Did I get it?
answer
13112221
Yes, that’s the solution
Keep going until you reach a 4!
Please explain more
Is this an honest question for information or a sarcastic slap on the wrist because my puzzle is basically a hint for OPs?
No I’m dumb but eventually figured it out after reading literally every comment in the thread. This one genuinely made me feel stupid.
13112221
1113213211
31131211131221
Wonder if/when a 4 would ever show up… and what the formula for that would look like
Think about it.
To get a 4, you need either 1111, which can’t happen because thats just 21, or you have 211112, which would again just be 31.
Seems you can’t have a series that ends in anything but 1, if it starts from 1?
2
12
1112
3112
132112
1113122112
311311222112
13211321322112
1113122113121113222112
I wonder if this type of series would eventually become repeating… or is it irrational?
Still curious what the mathematical proof would look like. Not that I’d be able to understand it regardless, but curious nonetheless
Your mother’s a 4.
And your father smelt of elderberries! Harumphh
Yeah. Probably.
You realize a 4 never will happen, right?
Not with that attitude, it won’t
Edit: I found the nerdy stuff I was curious about
Edit edit: and the real good stuff
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Thanks for the hint. I kept on overthinking it.
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21 minus 13 is unfortunately not 7… Unless I’ve misunderstood what you mean?