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This a series of questions that are created by myself.

I will give a hint in 24 hours and my answer in 3 days given that nobody could answer my question.

Here is question 5:

342,765,?,242325 (It seems like it is easy and might have several answers but there is only one answer and the logic must be the neatest) $$$$ If you guys want some extremely challenging questions. Please check these two questions posted by me.

Number sequences: 000, X00... and 6X000X9, 700XX08

What are the alphabets in the question mark?

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$131112$. If the number is $abc$, the new number is $(a+b)(b+c)(c+a)$. The number keeps these as 'single digits', hence the next number is $(13+11)(11+12)(12+13)=242325$.

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  • $\begingroup$ I hope this is a well-explained answer (+1) $\endgroup$ – Ak19 May 19 at 14:37
  • $\begingroup$ Congrats! This is the right answer. $\endgroup$ – LETTERKING May 20 at 14:46

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