恐怖的数学题
问题描述：
恐怖的数学题
100个7组成一个100位数,它除以13的余数是几?
答
7/13=...777/13=5...12777/13/=59...107777/13=598...377777/13=5982...11777777/13=59829...07777777/13=598290...777777777/13=5982905...12777777777/13=59829059...10由此得出,商的规律是7,12,10,3,11,0,7,12,10...