When the positive integer k is divided by 7,the remainder is 6.What is the remainder when k+2 is divided by 这种余数的题怎么做啊,我忘光叻!
问题描述：
When the positive integer k is divided by 7,the remainder is 6.What is the remainder when k+2 is divided by
这种余数的题怎么做啊,我忘光叻!
答
6+2-7=1
答
k=n*7+6
(k+2)/7=(n*7+8)/7=n+1+1/7
所以,余数为1