-- If the same digit may be repeated, then 27 can be made.
-- If the same digit may not be repeated, then 6 can be made.
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about 13
32C3 = 4960
There are none.Any number made by using the digits 0 to 9 once is divisible by 9 and so not a prime.There are none.Any number made by using the digits 0 to 9 once is divisible by 9 and so not a prime.There are none.Any number made by using the digits 0 to 9 once is divisible by 9 and so not a prime.There are none.Any number made by using the digits 0 to 9 once is divisible by 9 and so not a prime.
24
If you're limited to only 5 digits that can't be repeated, then there are 120 ways they can be arranged.