well we'll need to know which numbers they are. . . so, i don't know.
There are 5*4*3 = 60 groups.
you can make at least 25 sums
4 groups of 10 = 40. 40 /5 = 8 so the answer is 8 groups of 5.
20 There can be two answers to this: I'll assume this is what you meant-> let's say you mean like pairing the numbers 1-5 with the numbers 6-9. 5*4=20
If the six numbers are all different, then the answer is 6C4 = 6*5/(2*1) = 15
5
120
If the order of the 4 numbers matters, then there are (6 x 5 x 4 x 3) = 360 .If the order of the 4 numbers doesn't matter, then there are 15 different groups of 4.
From 1 to 20, you can pull out 15,504 different groups of 5 numbers, and each group can be lined up in 120 different orders.
89,999 different numbers i guess
5
If not using the same number twice: 36x35x34x33x32= 45,239,040 If allowed to use all numbers up to 5 times: 36x36x36x36x36=60,466,176
well we'll need to know which numbers they are. . . so, i don't know.
about... 25 just take 5 numbers times 5 numbers
8
There are 5*4*3 = 60 groups.