8*7*6*5*4 = 6720 of them.
You can make 4*4*4 = 64 numbers.
Yuo can make only one combination of 30 digits using 30 digits.
2578 5287 5782 8572
You can make 24 numbers by rearranging the digits. However, you can make vastly more if you allow mathematical operations on the digits. For example, 3+5*8-6 = 37.
9,000 - all the numbers between 1,000 and 9,999 inclusive. * * * * * NO. Those are PERMUTATIONS, not COMBINATIONS. Also, the question specified 4 digit combinations using 4 digits. The above answer uses 10 digits. If you start with 4 digits, you can make only 1 combination.
89,999 different numbers i guess
There are 192.
1x+4y=
You can make 4*4*4 = 64 numbers.
9
2 * 2 * 2 * 2 It's not possible to make 16 without using the same numbers twice or without using whole numbers.
You can make three even numbers out of the digits 4, 5, and 6 by using the digits 4 and 6 twice: 464, 466, and 446.
Using the combination C(4,3) I got the answer 24. Its either a combination or a permutation.
With 123 digits you can make 123 one-digit numbers.
600 of them.600 of them.600 of them.600 of them.
24
3*3*2*1 = 18 of them.