You dont say whether zero is included or whether a digit may appear twice. These are the various answers:
No zero, no digit more than once in same number: This is any 6 from 9 in any order which is factorial 9 divided by 6 ie 60480
No zero, digit may be repeated: 9 to the sixth power: 531441
Zero allowed in any position, no digit more than once in same number: This is any 6 from 10 in any order, which is factorial 10 divided by 24 ie 151200
Zero allowed in any position, any digit may be repeated: 10 to the sixth power, ie 1000000.
Finlly, if you regard 123456 as the same combination as 123654, then answer is any 6 from 9 which is a mere 84
* * * * *
There is only 1 combination of 6 digits out of 6. Order does not matter in combinations so 123456 is the same as 342516 ect. One of the consequences is that there are no "leading" digits and so the presence, or otherwise, of 0s is irrelevant.
If, instead of 6 out of 6, the question were about 5 or fewer out of 6 then whether or not the 6 were all distinct will matter.
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.
9!/5! or 3024
8C6 = 28
2 to the 7th power = 128 * * * * * No. That is the total number of combinations, consisting of any number of elements. The number of 2 number combinations is 7*6/2 = 21
None. You do not have enough numbers to make even one combination.
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.
9!/5! or 3024
8C6 = 28
2 to the 7th power = 128 * * * * * No. That is the total number of combinations, consisting of any number of elements. The number of 2 number combinations is 7*6/2 = 21
252 combinations, :)
None. You do not have enough numbers to make even one combination.
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.
20
There are 8,592,039,666 combinations of 6 numbers out of 138 numbers, like the numbers from 1 to 138.
There are a huge number of combinations of 5 numbers when using the numbers 0 through 10. There are 10 to the 5th power combinations of these numbers.
If every number can be used as many times as you like, there are 104 = 10000 different combinations. If each number can only be used once, there are 9!/(9 - 4)! = 5040 combinations.
There are infinitely many numbers and so infinitely many possible combinations.