Jantje_Smit » 06 Aug 2022, 3:29 am » wrote: ↑
I thought about it some more and since it makes my head hurt I came up with another logical solution... it can't be done without knowing if that one marble is heavier or lighter...you put that in just to mess with peoples heads... but of course you would never do such a thing... right... lol...
I might be wrong... in that case I would love to hear the solution... but I'm not going to break my head over it, that doesn't go well if I smoke some herbs... and I really need some now...

lol, there's no messing! After three weighings, you should determine which marble is different, and whether it heavier or lighter than the others. No tricks :-)