A while back, while demonstrating the difference between MtG spin-down dies and RPG d20s, I used the red d20 from the Beginner Box set. To my surprise, only a few sides actually added up to 21 on opposite sides--where as on all my other d20s, all opposite sides add up to 21. I thought mine was a defect until I checked the second copy of the BB I own and it was the same.
Anyone else notice this?