再请教两道数学基金题目

1.    另一条在gwd出现过: A circle with a centre on positive x-axis, 问哪一个condition is sufficient to find the radius: (1) x co-ordinate 是某数 (2) y co-ordinate 是某数

请问这道题目是什么意思呢？

1.      另一条在gwd出现过: A circle with a centre on positive x-axis, 问哪一个condition is sufficient to find the radius: (1) x co-ordinate 是某数 (2) y co-ordinate 是某数

2.      还有Find a median of n consecutive even integers (1) Median is a ratio of the remaining sum of integers (2) the sum of remaining integers excluding median is a figure

      不清楚题目意思，请指教