Corretto: 5x2=10, 9x3=27, 8x5=40, 6x7=42, 2x2=4, 5x3=15, 9x10=90, 9x7=63, 4x3=12, 5x5=25, Errato: 5x2=7, 9x3=18, 8x5=63, 6x7=49, 2x2=6, 5x3=12, 9x10=9, 9x7=72, 4X3=15, 5x5=20,

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