9
In all there are 210 - 1 = 1023 combinations.
Of these,
1 has all 10 digits
10 have 1 or 9 digits
45 have 2 or 8 digits
120 have 3 or 7 digits
210 have 4 or 6 digits
252 have 5 digits.
In a combination, the order of digits does not matter.
There are 6C3 = 20 such combinations.
If repeats are allowed than an infinite number of combinations is possible.
Three combinations: 23, 24 and 34
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.
There are 45 combinations.
Since a number can have infinitely many digits, there are infinitely many possible combinations.
There are 4845 combinations.
252 combinations, :)
There are infinitely many numbers and so infinitely many possible combinations.
There are 6C3 = 20 such combinations.
There are 5,461,512 such combinations.
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
If repeats are allowed than an infinite number of combinations is possible.
the number of colour combinations when you start is 64, I think
Three combinations: 23, 24 and 34
36
35