three - 1 x 3, six - 2 x 3, nine - 3 x 3, twelve - 4 x 3, fifteen - 5 x 3, eighteen - 6 x 3, twenty one - 7 x 3, twenty four - 8 x 3, twenty seven - 9 x 3, thirty - 10 x 3,

Timetable 3

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