1 set
120 5-digit numbers can be made with the numbers 12345.
The first digit can have 5 possible numbers, the second digit can have 4, the third 3, the fourth 2. 5
ccsndf
It is 2.
1 set
It is 120 if the digits cannot be repeated.
Assuming the question refers to the digits 1, 2, ... , 9 the answer is 1344 numbers.
120 5-digit numbers can be made with the numbers 12345.
The first digit can have 5 possible numbers, the second digit can have 4, the third 3, the fourth 2. 5
jfnvjsdkncjfdknvlakdjvbsadoihfcb shfvbcnsHLfc bnshJCbvjhbeshuyvbe b hdfbgehfgbwahucgbvfer fguy gyfuby uyr
If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.
ccsndf
There are 625 of them - too many to list.
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.
It is 2.
If the two must be different digits, then there 20 possibilities. If they can be the same one, then there are 25 possibilities.