1-54, how many 6 figure combinations are there? How do you determine, formula wise?

Answer 1

999999 - 100000 + 1 = 900000. (highest - lowest. since the lowest # has been excluded in the subtraction, add 1)

or each place except the first can be occupied by 10 digits. the first digit cannot be 0, therefore there are 9 possibilities for it.
thus by law of multiplication (counting principle),
9*10*10*10*10*10 combinations exist = 900000

Answer 2

If you mean you have 54 numbers (or cards or anything) how many different ways can 6 of them be picked? there are 54 choices for the first pick, then 53, then 52 and so on. To figure out how many total combinations there are multiply

54 X 53 X 52 X 51 X 50 X 49 which equals 18,595,558,800. This assumes that once a number is picked it can't be used again. If you allow for repetition then the answer is equal to 54^6.