4 + 3 + ? = 8, 2 + 5 + ? = 9, 1 + 4 + ? = 11, 4 + 6 + ? = 15, 3 + 7 + ? = 13, 4 + 1 + ? = 10, 3 + 6 + ? = 14, 9 + 1 + ? = 15, 3 + 8 + ? = 20, 5 + 4 + ? = 17.

missing number maths 13.11.13

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