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Can you find the missing number? This number has a single digit.

1 → 3

3 → 5

5 → 4

4 → ?

Good luck!


marked as duplicate by Deusovi Oct 9 at 2:37

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  • 3
    $\begingroup$ This, just like your other puzzle, is well-known and its name is '4 is the magic number' riddle. Please refrain from asking these here. $\endgroup$ – Duck Oct 9 at 1:22
  • $\begingroup$ Ok thanks. I didn't realize it is well known. $\endgroup$ – Dmitry Kamenetsky Oct 9 at 2:44

4 -> 4 because "four" has four letters.

In the end, everything becomes 4.


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