3 1 3 x 5 9 10 July 8, 2019 16 32 64 128 8 1 3 x 5 9 10 3 5 1 x 3 )= 9 10 5x 3 5 2 3 x 9 5 )- 3 10 5x 1 3 )= 7 15 3 x 3 = 9
