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the question does not make sense, as it stands.
if the 4 refers to the idea of providing 4 specific numbers and then combining them in different ways
there are lots of combinations such as adding them or multiplying them, etc., but.....
if you mean combining the numbers by listing all 4 of them in different orders, that's called permutation, not combination. How many ways? Well, there are 4 ways of choosing which one comes first, then three choices for the next and two for the next, so you have 24 ways.
If you are interested in combinations of numbers that's different. you my wish to select just one , two, three or all 4 of a set of numbers.
If the order didn't matter, there is 1 way of selecting none of them, 4 ways of only choosing one, and six ways of choosing only 2, 4 ways of choosing three,1 way of choosing all 4. that's 16 combinations.
If the order matters, you have to permute each of your combinations. 65 possible results!
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How many combinations are possible using 4 specific numbers?
4582
How many 5 digit combinations are possible using 8 specific non repeting numbers?
it depends on which 8 numbers your talking about
What are the 5-number combinations not using any number twice?
There are infinitely many numbers and so infinitely many possible combinations.
How many possible alpha numeric combinations using letters and numbers for 8 characters?
it is 26
If using numbers 1 thru 49 how many 6 digit combinations can be made?
Using the formula n!/r!(n-r)! where n is the number of possible numbers and r is the number of numbers chosen, there are 13983816 combinations of six numbers between 1 and 49 inclusive.
