That's disappointing, if you just meant for them to sum up the sides and divide. But at first I thought you meant to figure out the probability of the die being

That's disappointing, if you just meant for them to sum up the sides and divide. But at first I thought you meant to figure out the probability of the die being loaded - after the first roll, there's a higher chance of getting the same number than any other. Plus I'm assuming the physics of a loaded die don't just influence one side, but have a non uniform effect. Or maybe by "you have a dice" it means it's mine, and I know it's not loaded (I doubt I'd know, and the cheap DnD dice I own are probably not casino quality). So maybe this guy is trying to take advantage of known quality issues in common dice. For instance. the extra pits on the higher valued sides mean that side is lighter, thus has a higher chance of coming up, right? (The side with 1 pit weighs the most, so I'd expect some bias towards rolling a six.) Cause if we assume the person offering me money has an angle, well, there's gotta be something, right?