12. Add a single stroke to the character 日 to give another character; Find eight ways to do this.   日  JITSU, hi, ka - Sun, Day

Answer: 

白  HAKU, BYAKU, shiro(i), shira - white

旦  TAN, DAN, akira, tadashi, asa - morning 

旧  KYUU, KU - old, former

田  DEN, ta - rice field

目  OU - king

申  SHIN, mo(usu) - to say, be named

由  YUU, YU, YUI, yoshi - reason, cause

甲  KOU, KAN - primary