This dice looks amazing and I wanted to impress my friends. However the die I ordered was NOT a new die, and to make matters worse, several 20's and other high numbers had been rolled out of it! If you know anything about statistics, you'd know that the odds of rolling an initial 20 from a brand new die are 1/20 which is reasonable. But the odds of rolling subsequent 20s (ie from a die which has already rolled any 20s) is much lower. For example the odds of rolling two 20s in a row is 1/400, the odds of 3 is 1/8000!

So I unknowingly brought this to a roleplaying session and began rolling extremely low on my checks. I began to get frustrated and started taking records and was shocked at my discovery!

The odds of rolling any given number (1 - 20) is 1/20. I rolled 100 times. This would have an expected 5 hits for each number. But it wasn't even close, out of 100 rolls I rolled only TWO 20s! and only 1 19! The numbers were clearly stacked against me from previous rolls (which I doubt occurred in shipping, the packaging was very tight.)

My theory is this company buys these dice new in bulk and rolls them a lot, the dice with more higher results (meaning less likelihood of future higher results) are shipped off at a low price and the ones with more lower results (meaning future higher results) are kept to get an edge on future dice-rolling ventures.