9 9x 9 9 July 8, 2019 16 32 64 128 9x * 9 9 * x * 9 9 9x9 9 9 9 5x 9 9 9x 2 8 9x 8 9 98 9 9x9 9 9 9 answer 9 x 8 = 9 × 9
