It is 120 if the digits cannot be repeated.
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
jfnvjsdkncjfdknvlakdjvbsadoihfcb shfvbcnsHLfc bnshJCbvjhbeshuyvbe b hdfbgehfgbwahucgbvfer fguy gyfuby uyr
If the two must be different digits, then there 20 possibilities. If they can be the same one, then there are 25 possibilities.
500
1 set
It is 120 if the digits cannot be repeated.
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
jfnvjsdkncjfdknvlakdjvbsadoihfcb shfvbcnsHLfc bnshJCbvjhbeshuyvbe b hdfbgehfgbwahucgbvfer fguy gyfuby uyr
125
There are 7,290 different 4-digit numbers that can be formed from the digits 1-9 without repetition.
The first digit can have 5 possible numbers, the second digit can have 4, the third 3, the fourth 2. 5
There are 625 of them - too many to list.
27 three digit numbers from the digits 3, 5, 7 including repetitions.
If the two must be different digits, then there 20 possibilities. If they can be the same one, then there are 25 possibilities.
24
500