How many six(6)number combinations are they in the numbers one(1) to thirty(30)?

Question

example(1,2.3,4,5,6) (2,9,8,4,3,5) (29,4,8,26,20,17)

and so on

Answer 1

?

Answer 2

593775

This is achieved by multiplying 30x29x28x27x26x25 and dividing by 1x2x3x4x5x6

Answer 3

with this

      n!

----------

k!(n-k)!

it's 593775  

it's not 30*30..., because same number can't be twice in a combination

Answer 4

156,238,908

Answer 5

nice question-_-