9 - 9 x 9 9 July 8, 2019 16 32 64 128 9 9 x 9 9 9 9 x 9 9 0 9 x 9 9 9 2 9 5 x 9 9 9 3 9 9 9 9x9 9 9 x 9 )= 90 9 x 9 x 9 x 9 x9 9 x 9 900 99 9 x 9 9 x 9 91 9 x 9 x 9 x 9 x 81 9 x 7 x 9 x 9 x 7 x 9 9 10 x 9 10 x 9 10 x 9 10 9 3 x 9 3 9 2 x 9 3 2x 9 2 x 9 )=( 2x 9 )( x 9 2
