1,2,3,4,5,6,7,8,9,10,11,12填入3*3的空格中,使横竖都得21,怎么填?

问题描述:

1,2,3,4,5,6,7,8,9,10,11,12填入3*3的空格中,使横竖都得21,怎么填?

  1164
  975
  1812