Three numbers can be arranged in 27 different sequences if repetition
is allowed, and in 6 different sequences if it's not.
9
You can make 5 combinations of 1 number, 10 combinations of 2 numbers, 10 combinations of 3 numbers, 5 combinations of 4 numbers, and 1 combinations of 5 number. 31 in all.
8C3 = 56 of them
There are 32C3 = 32*31*30/(3*2*1) = 4960 combinations. I do not have the inclination to list them all.
If the numbers can be repeated and the numbers are 0-9 then there are 1000 different combinations.
There are 23C3 = 23!/(20!*3!) = 23*22*21/(3*2*1) = 1,771 combinations.
I dont understand what you are asking.
There are: 10C3 = 120
how many combinations of 4 numbers are there in 7 numbers
13 combinations of 3
14 * * * * * Wrong! There are 15. 4 combinations of 1 number, 6 combinations of 2 number, 4 combinations of 3 numbers, and 1 combination of 4 numbers.
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.