2 5x4= July 8, 2019 16 32 64 128 2 5x4 2 5x4 7 2 5x40 2 5x45 2 5x4 3 2 5x4 9 2 5x4 6 2 5x4 1 2 5x4 4 2 5x4 10 2 5x420 2 5x400 2 5x4 8 2 5x4 7 solve 2 5x450