determine random order by any group of 2-4 with no ties and equal probabilities for each order outcome.
These dice use clever mathematics to achieve something remarkable. Imagine the situation... You and 3 friends need to decide who goes first, second, third and fourth in a board game. So you decide to roll some dice. Highest number first and so on. But if any of you draw, another roll will be needed....
https://mathsgear.co.uk/products/go-first-dice
And the detailed analysis of the math behind it—