When most people just say "die", they mean what gamers call a d6. A standard d6 has no "zero" face, so the probability of a zero face coming up is 0.
So, clearly, if you're not just trying to be a smart-@$$, you've got some kind of nonstandard die in mind. And you'd need to give more details about it before you could get an answer.
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Since zero is not on the die, the probability of getting a zero is 0%.
The probability of getting a six on a six sided die and then getting a tails is zero. There is no tails on a die.
The probability of getting an 8 on a standard six-sided die is zero.
It is 0.01543
As the maximum value of the dots on the face of a traditional dice is 6 the probability of throwing A die with the value of less than 7 is 100%.