3 6 7 ) 5 9 3 July 8, 2019 16 32 64 128 3 6 7 )+ 5 9 3 3 5 6 7 9 what 3 numbers add up to 12 11 7 5 3 9 bar 3 6 1 3x 7 9 )( 6 5 3 2 x )= 0