循环数问题虽然在中考题中不常见,但有时有这种题,同学们在做这种题时,常常不知如何选数,造成错误.下面不妨通过四个例子来说明循环数问题的解法.例1观察下列等式:2~1=2,2~2=4,2~3=8;2~4=16;2~5=32;2~6=64;2~7=128;……通过观察,用你所发现的规律确定2~(2006)的个位数字是____.解通过观察发现,个位数字的排列规律是 Although the problem of the number of cycles is not common in the examination questions, sometimes there are such questions. When students do such questions, they often do not know how to choose numbers and cause mistakes. Here are four examples to illustrate the solution to the problem of the number of cycles. Example 1 Observe the following equation: 2~1=2,2~2=4,2~3=8;2~4=16;2~5=32;2~6=64;2~7=128;... ... By observing, using the rules you found to determine the number of digits from 2 to (2006) is ____. The solution shows that the arrangement of the digits is