AMC 8 1985 Problem 7

AMC8 1985 年第 7

数列与规律★★☆☆☆
A "stair-step" figure is made of alternating black and white squares in each row. Rows 1 through 4 are shown. All rows begin and end with a white square. The number of black squares in the 37\textth37\textth row is
一个"阶梯"图形由每行交替的黑白正方形组成。图中显示了第 1 行到第 4 行。每行都以一个白色正方形开始和结束。第 37 行中黑色正方形的数量是
AMC 8 1985 Problem 7 figure
  1. A.34
  2. B.35
  3. C.36
  4. D.37
  5. E.38

正确答案 · Correct Answer

C

解析 · Solution

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