1 3 5 6x 1 6 July 8, 2019 16 32 64 128 2 3 1 6x 5 6x 1 3 1 6x 2 3 1 2x 5 6 5 6x 3 4x 1 2 3x 1 6 6 5 6x 1 1 3 )= 21 1 6x 5 6 1 2x 3 5 6x 1 )/ 3 1 x 3 )/ 6 11 12 1 6x 5 6x 1 3