1 × 3 = 3, Double 1 + 1, 2 × 3 = 6, Double 2 + 2, 3 × 3 = 9, Double 3 + 3, 4 × 3 = 12, Double 4 + 4, 5 × 3 = 15, Double 5 + 5, 6 × 3 = 18, Double 6 + 6, 7 × 3 = 21, Double 7 + 7, 8 × 3 = 24, Double 8 + 8, 9 × 3 = 27, Double 9 + 9, 10 × 3 = 30, Double 10 + 10

3's - double plus one

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