1 25 4x 5 July 8, 2019 16 32 64 128 1 5 20x 25 )= 4x 5 25 1 2x 5 )( 4x 6 1 4x 2 5x 25 10 4x 1 )= 25 x 5 1 25x = 40 1 4 x 25