On all 6 sided dice, the opposite sides must add up to 7.

See "http://www.madehow.com/Volume-4/Dice.html" for information on dice rules and history.

The dice shown on one of the Ocean's 13 AUSTRALIAN release posters do not follow these rules for dice.

For example, you can see the 4 and 3 spots on adjacent sides, not opposite ones.

I am not sure if other country posters are the same.