The answer is 9
5 : 3 1
10: 6 2
15 : 9 3
20 : 12 4
25 : 15 5
30 : 18 6
35 : 21 7
40: 24 8
45 : 27 9
(I'm not the best at explaining)
5 win : 3 lost
*9 *9
------- -----------
45 win : 27 lost
Answer: 27 lost
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