7x 1 2 5 10 July 8, 2019 16 32 64 128 X 2 5 x 1 7x 10 9 2 1 5 2x 1 )= 7x 10 7x 10 1 2 5 x 9 7x 2 )= 5 10x 1 1 7x 5 10x 4 1 8x 2 x 7 x 10
