Cut the 7cm into 1, 2 and 4.
Day1: give the 1 =1
Day2: take back the 1. give the 2 =2
Day3: give the 1 =3
Day4: take back the 1 and 2, give the 4 =4
Day5: give the 1 = 5
Day6: take back the 1, give the 2 =6
Day7: give the 1. That is all given to him =7. 作者: cessnaock 時間: 2007-2-14 17:36 標題: 回復 #2 Santos 的帖子