If r is the remainder when the positive integer n is divided by 7, what is
the value of r?
(1) When n is divided by 21, the remainder is an odd number
(2) when n is divided by 28, the remainder is 3
这题我看网络解法还是不是很懂
但我后来想想 他是问说r=?
只有B有给出r=3 而A没有给出明确答案
所以选B吗?
毕竟n也没有写多少!!!
可以这样理解吗??