You can make 6 combinations with 3 numbers. They are:
123 213 312
132 231 321
* * * * *
NO! Those are permutations! In combitorials, the order does not matter so that the combination 123 is the same as the combination 132 etc. So all of the above comprise just 1 combination.
With three numbers you can have
1 combination of three numbers (as discussed above),
3 combinations of 2 numbers (12, 13 and 23)
3 combinations of 1 number (1, 2 and 3)
In all, with n numbers you can have 2n - 1 combinations. Or, if you allow the null combination (that consisting of no numbers) you have 2n combinations.
1000
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.
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.
Only one.
Assuming that the only permitted operation is addition, then there are 4 combinations.
1000
If the numbers can be repeated and the numbers are 0-9 then there are 1000 different combinations.
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.
Using the combination fuction, chose three numbers from 45 numbers. The answer is 14,190.
20,3,10 or 12,5,10 there are many combinations of numbers
6
5
16.65
how many combinations of 4 numbers are there in 7 numbers
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.
Assuming you are treating each number as a number and not as an individual unit, the numbers you can make from these digits are 899, 989 and 998.
Their is 25 combinations