In how many ways can you make 100 without using the same number more than once?

99,1
98,2
97,3
96,4
95,5
94,6
93,7
92,8
91,9
90,10
89,11
88,12
87,13
86,14
85,15
84,16
83,17
82,18
81,19
80,20
79,21
78,22
77,23
76,24
75,25
74,26
73,27
72,28
71,29
70,30
69,31
68,32
67,33
66,34
65,35
64,36
63,37
62,38
61,39
60,40
59,41
58,42
57,43
56,44
55,45
54,46
53,47
52,48
51,49
50,50
Fifty and fifty may not apply to the rules, but I hope this helps. :-)