7 1 1 2 9 5 July 8, 2019 16 32 64 128 7 1 9 2 5 6 7 1 2 x 1 5 9 7 1 2 х 1 5 9 7 2x 1 2x 5 1 2 9 2x 9 1 x 2 1 = 7 5
