Not possible in whole numbers
YES
No.
-2
Assuming leading zeros are not permitted, then: If repeats are not allowed there are 30 possible numbers. If repeats are allowed there are 60 possible numbers.
3 and 5
1, 3, 11, 33 3 and 11 are prime.
2 and 3
90 = 2 x 3 x 3 x 5 = 2 x 32 x 5
Not possible in whole numbers
3 and 36
YES
No.
-2
Divide the number of possible even numbers by all the possible numbers. So there are three possible even numbers; 2, 4 & 6. And there are six possible numbers; 1, 2, 3, 4, 5, & 6. So the probability of throwing an even number is 3/6 = .5 .
Assuming leading zeros are not permitted, then: If repeats are not allowed there are 30 possible numbers. If repeats are allowed there are 60 possible numbers.
Total number of possible 3-digit numbers = 9!x10!10!