Aprofessorwasgivingabigtestonedaytohisstudents.Hehandedoutallofthetestsandwentbacktohisdesktowait.Oncethetestwasoverthestudentsallhandedthetestsbackin.Theprofessornoticedthatoneofthestudentshadattacheda$100billtohistestwithanotesaying"Adollarperpoint."Thenextclasstheprofessorhandedthetestsbackout.Thisstudentgotbackhistestand$64change.一天，教授正在给学生们监考。他发下试卷，然后回到讲台前等待。考试结束了，学生们纷纷交回试卷。教授发现一张试卷上别着一张百元钞票，还有一张纸条写着："一分一块钱。"第二 ...