72 = 8×9显然六位数A6879B能被8、9整除.1、能被8整除,需满足79B能被8整除：【79B】=790 + B = 98×8 + B + 6则B + 6能被8整除,B = 22、能被9整除,需满足A+6+8+7+9+2=A + 32能被9整除A + 32 = 3×9 + A + 5则A + 5能...