17 5×0 8 July 8, 2019 16 32 64 128 17 5 * 0 8 17 5 * 0 85 21 17 5 x 0 8 1 0 5 8 17 0 5 8 17 what next 17 5-8 5 17 - 8 5 17 5×5
