-- 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.
Read more: How_many_3-digit_numbers_can_be_made_using_the_digits_2_3_7_9
Read more: How_many_3-digit_numbers_can_be_made_using_the_digits_2_3_7_9
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.
depends on your answer
about 13
2
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.
There are 24 number made by permutations of the digits. There are lots more if the digits can be repeated, for example, 27335722. Even more can be made by using arithmetic and algebraic operations, for example 35^27 = approx 4.8960*10^41. You have not specified what the rules for "making" numbers are!
24
If you're limited to only 5 digits that can't be repeated, then there are 120 ways they can be arranged.
9,752 9,725 9,572
Six: 234, 243, 324, 342, 423, and 432.
874321 is the largest number made from all these digits.
9*9*9 = 729 using the digits 1 to 9 and 2*9 using 10 and another digit. 749 in all.