12 √ 6 3 √ 2 July 8, 2019 16 32 64 128 12 6 3 2 8 12 6 3 2 12 6 3 2 4 12 6 3 2 1 12 6 3 2 8 solution 12 6 3 2 x 8 6 12 3 24 12 6 * 27 3 6 12 3 20 12 6 3 5 2 12 6 x 3 2 12 7 3 6 2 12 3 6 7x 4 2 24 12 6 3 sequence 21 12 6 3