Corretto: 8/2, 5/4, 9/5, 6/4, 17/9, 3/2, 23/10, 10/8, 5/2, 18/7, Errato: 1/2, 3/4, 3/5, 5/10, 9/15, 1/4, 3/8, 8/10, 8/9, 7/34,

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