@Chrono79

Thanks, I must have missed that part. Solved.

1 (and all numbers except 9) is already there, so it can't be used.

All of the ?s in an expression will represent the same digit (0-9), and it won't be one of the other given digits in the expression.

js

what language?

test : "if more than one digit works, give the lowest one".
also test : "Testing for: ?35805+5466=?41271. Expected: 9, instead got: 1"
are instructions still correct?)

Elixir translation awaiting approval.

No, you're wrong, the tests are ok. Read the instructions again.

All of the ?s in an expression will represent the same digit (0-9), and it won't be one of the other given digits in the expression.

^ That

1*11=11, why do you say 1 does not work here? The lowest solution is 1, but it wants 2.

This one is beyond broken. Many test cases are reporting as incorrect as its expecting the return value to be a larger number than the lowest solution. Even though it tells us to return the smallest solution, it says we're wrong when we do so.