27
24 different numbers.
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
6
Possible solutions - using your rules are:- 11,13,17,31,33,37,71,73 &77
There are 60480 numbers.
Well, darling, if you're looking to form three-digit numbers using the digits 0 to 9, you've got 10 choices for the first digit (can't start with 0, honey), 10 choices for the second digit, and 10 choices for the third digit. So, that's 10 x 10 x 10, which gives you a grand total of 1000 possible three-digit numbers. Hope that clears things up for you, sugar!
27
24 different numbers.
48 of them if digits may not be repeated. 100 if they can.
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
6
Possible solutions - using your rules are:- 11,13,17,31,33,37,71,73 &77
Using the digits of 1345678, there are 210 three digit numbers in which no digit is repeated.
I take it that you want to make three digits numbers with 8,7,3, and 6 without repetition. The first digit cane be selected from among 4 digits, the second from 3 digits, the third digit from 2, hence the number of three digit numbers that can be formed without repetition is 4 x 3 x 2 = 24
None. Nine digit number cannot be formed using only five digits 1,2,3,4,5 in the case none of the digits can repeat. -------- Egad! I misread the question, apologies to the questioner. And thanks to Miroslav.
151200 numbers.