问DG DS 171

mablic

看不懂这题的答案表达的意思。

what is the tens digit of positive integer x?
1. x divided by 100 has a remainder of 30.
2. x divided by 110 has a remainder of 30.

我想问2选项有中为什么十分位的数值不是定值？用140 250 360 除出来的结果都是X.27啊…为什么不为定值？