There are a series of true scores, arranged according to the following rules: 1 / 2, 1 / 3, 2 / 3, 1 / 4 There are a series of true fractions, arranged according to the following rules: 1 / 2,1 / 3,2 / 3,1 / 4,2 / 4,3 / 4 What is the 100th score?

1. Nine out of fifteen
There are 1 with 2 as the denominator, 2 with 3 as the denominator, and N-1 with n as the denominator
1 +.. + 13 = 91, so it should take 14 + 1 = 15 as the denominator, which is 100-91 = 9, that is, 9 / 15, 9 / 15
two
|a-d|=6

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