AMC 8 1989 Problem 1

AMC8 1989 年第 1

数列与规律☆☆☆☆
(1+11+21+31+41)+(9+19+29+39+49)=
(1+11+21+31+41)+(9+19+29+39+49)=
  1. A.150
  2. B.199
  3. C.200
  4. D.249
  5. E.250

正确答案 · Correct Answer

E

解析 · Solution

解析整理中

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