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3 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10
6 + 4 + 5 + 6 + 7 + 8 + 9 + 10
10 + 5 + 6 + 7 + 8 9 + 10
15 + 6 + 7 + 8 + 9 + 10
21 + 7 + 8 + 9 + 10
28 + 8 + 9 + 10
36 + 9 + 10
45 + 10
55
Jadi jawabannya adalah 55.