Question: are all dice the same?
Answer: As long as the numbers are all present, the die would still be fair and proper, and the probability of rolling any particular number would be constant - 1/6. ... The average of this seriously-deformed dice is: 1 * 1/3 + 2 * 1/12 + 3 * 1/12 + 4 * 1/12 + 5 * 1/12 + 6 * 1/3 = 3.5, the same as a normal dice.