There are 2000 such numbers.
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
64 if repetition is allowed.24 if repetition is not allowed.
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.
125
64 if repetition is allowed, 6 otherwise.64 if repetition is allowed, 6 otherwise.64 if repetition is allowed, 6 otherwise.64 if repetition is allowed, 6 otherwise.
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
There are 2000 such numbers.
64 if repetition is allowed.24 if repetition is not allowed.
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.
125
64 if repetition is allowed, 6 otherwise.64 if repetition is allowed, 6 otherwise.64 if repetition is allowed, 6 otherwise.64 if repetition is allowed, 6 otherwise.
125 There are five choices for each of the three digits (since repetition is allowed). So there are 5*5*5=125 combinations.
Possible solutions - using your rules are:- 11,13,17,31,33,37,71,73 &77
It is 415968.
20 of them, if repetition is not allowed.
Just six numbers... 345, 354, 435, 453, 534 & 543
9 odd numbers less than 100 can be formed. They are: 3,5,7,35,37,53,57,73 and 75.