like i said before somewhere else.. if you are not native english speaker and you see that for first time, i really think most people will not understand what you need to do, after i translate it , its still difficult to understand in that time even its quite easy... my english is my 2nd foreign language but its easier to understand standard text but not this specific thingsi think its okay to use some chart, not just for people who cant do this math for people who just dont know what is that like me , try it if you learning some foreing language if you know what divide and multiplies are.. i am playing this game with am/pm time even im not okay with this 12hrs thing but putting some boss with this mechanic is just sad.. there is no logic in the first time like colors or something, its just knowledge thing i think