1 set
6*6*3 = 108 numbers.
6*5*4*3*2*1=720 possible numbers
48 of them if digits may not be repeated. 100 if they can.
There are 5! = 120 such numbers.
Assuming no repeated digits, lowest first, 20; in any order 120; Allowing repeated digits: 216
It is 120 if the digits cannot be repeated.
jfnvjsdkncjfdknvlakdjvbsadoihfcb shfvbcnsHLfc bnshJCbvjhbeshuyvbe b hdfbgehfgbwahucgbvfer fguy gyfuby uyr
500
24
5040 different 4 digit numbers can be formed with the digits 123456789. This is assuming that no digits are repeated with each combination.
3x3x3=27
6*6*3 = 108 numbers.
36
4*3*2*1 = 24
6*5*4*3*2*1=720 possible numbers
48 of them if digits may not be repeated. 100 if they can.
There are 5! = 120 such numbers.