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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.
The first digit may be any of 5 possibilities. The second digit may not be same as first, so only 4 possibilities. Likewise 3rd, 4th, and 5th digits may be chosen from only 4 possibilities. All together: 5*4*4*4*4 = 1,280 numbers.
24