# Crack the code? Puzzle [closed]

Crack the code . Can you. Then you will be genius.

• What is the source of this puzzle? Or did you make it yourself? – Rand al'Thor Apr 6 '20 at 12:56
• So, I found the likely source to this edited pic. listquiz.blogspot.com/2020/03/find-code-and-unlock-it.html - EDIT: It actually looks like it's from a different source as the above copied pic has curved corners; maybe a mobile app? How do we handle these? – MacGyver88 Apr 7 '20 at 12:09

The number is

$$6824$$.

Explanation:

• From the fourth clue, one of $$3817$$ is correct and well placed. It can't be $$1$$ (that would contradict the third clue) or $$3$$ or $$7$$ (that would contradict the second clue), so it must be $$8$$ in the second place.

• From the second clue, two numbers are correct and well placed. We know $$3$$ and $$7$$ are not in the solution, so it must be $$6$$ in the first place and $$4$$ in the last place.

• Now the third clue is valid with $$6$$ correct but wrongly placed.

• Finally, in the first clue, $$4$$ is wrongly placed, and $$3$$ and $$9$$ are not part of the solution, so the last number must be $$2$$ in the third place.

• Rand, you should be an experienced enough PSE member to know better than to answer questions that are obviously going to be put on hold for lack of attribution. – Gareth McCaughan Apr 6 '20 at 13:38
• @Gareth I'm here to have fun solving puzzles. There's no harm in that: it's not plagiarism since the OP isn't claiming to have made it themselves, and indeed there's no proof they didn't make it themselves. – Rand al'Thor Apr 6 '20 at 13:45
• @DavyM Worth leaving that as a comment on the question - it might influence people to reopen-vote based on "benefit of the doubt" arguments. – Rand al'Thor Apr 6 '20 at 20:13