There are 36 permutations of two dice. Of those, 9 add up to a sum of 5 or 6...
1 + 4 = 5
2 + 3 = 5
3 + 2 = 5
4 + 1 = 5
1 + 5 = 6
2 + 4 = 6
3 + 3 = 6
4 + 2 = 6
5 + 1 = 6
The probability, then, of rolling a 5 or 6 with two dice is 9 in 36, or 1 in 4, or 0.25.
It is 5/18.
If they are standard cubes - with numbers from 1 to 6 - the probability is 0.
It is 1 (a certainty) if you roll it often enough. For a single roll of a fair die, the probability is 1/6.
The probability of rolling a 5 on a roll of a single number cube is 1/6 (0.1666) as there is only one number 5 on a total of 6 sides on the cube.
The probability is 0.
It is 5/18.
The probability of rolling a 2 on the first roll is 1 in 6. The probability of rolling a 3 on the second roll is 1 in 6. However, the probability of rolling a 2 on the first roll and 3 on the second roll before you roll at all is 1/6 x 1/6 = 1 in 36.
If they are standard cubes - with numbers from 1 to 6 - the probability is 0.
If you roll a pair of six sided number cubes the probability of rolling two numbers whose sum is 6 is 5/36 or 0.1389. There are 5 ways to get 6: 1,5 & 5,1 & 4,2 & 2,4 & 3,3. There are 36 outcomes for a roll of 2 dice.
The probability of rolling a seven with one roll of a standard number cube is zero.
The first roll doesn't matter for probability, it just sets the number to be rolled by the other two. So: P(rolling the same number three times) = P(rolling a particular number)2 = (1/6)2 = 1/36
In a single roll for each die, it is (1/6)5 = 1/7776 = 0.000129 approx.
The probability is 1/36
If they are normal cubes, the probability is 1, if you roll them often enough.
It is 1 (a certainty) if you roll it often enough. For a single roll of a fair die, the probability is 1/6.
The probability is 0.
On a roll of two dice, the chance of rolling a 3 (one and two) is 2 in 36, or 1 in 18 when reduced.