3 5 x 1 1 6 x 3 7 July 8, 2019 16 32 64 128 2 3 x 5 4 1 2 x 7 6 1 3 8 3 5 x 4 4 9 x 6 1 3 x 1 7 8 5 x 7 = 35 1 5 ( x–3 – 7) = 6