24
there are 13,983,816 combinations.
30
15487877842540 to be precise
6
10
The number of combinations of six numbers that can be made from seven numbers will depend on if you can repeat numbers. In all there are over 2,000 different numbers that can be made.
8C6 = 28
10 Combinations (if order doesn't matter). 3,628,800 Possiblilities (if order matters).
15
10,000
120
56 combinations. :)
there are 13,983,816 combinations.
6 different combinations can be made with 3 items
If the numbers can be repeated and the numbers are 0-9 then there are 1000 different combinations.
45
If the numbers are allowed to repeat, then there are six to the fourth power possible combinations, or 1296. If they are not allowed to repeat then there are only 360 combinations.