3 1 6 2 7 9 July 8, 2019 16 32 64 128 1 3 3х 6 )- 2 7 7х 21 )= 9 1 3 3x 6 )- 2 7 7x 21 )= 9 3 10 х 2 6 7 х 1 5 9 2 1 3 x 6 7 x 9 10 1 2 7 x 3 1 6 x 2 9
