Corretto: 2 x 3 = 6, 2 x 9 = 18, 2 x 7 = 14, 2 x 6 = 12, 2 x 0 = 0, 2 x 4 = 8, 2 x 10 = 20, 2 x 1 = 2, 2 x 5 = 10, 2 x 2 = 4, 2 x 8 = 16, Errato: 2 x 3 = 8, 2 x 9 = 16, 2 x 7 = 12, 2 x 6 = 11, 2 x 0 = 2, 2 x 4 = 6, 2 x 10 = 22, 2 x 1 = 1, 2 x 5 = 9, 2 x 2 = 2, 2 x 8 = 18,

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