1999 AMC 8 第 3 题
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3.
下列哪一组三个数的和不等于 ？
Which triplet of numbers has a sum NOT equal to
小提示：
先计算看起来最容易的和
Compute the easiest-looking sums first
大提示：
只有一组选项的总和不是
Only one listed triplet fails to total
解答：
A 等于
B 化简为
C 的和是
但 D 的和为
为确认起见，E 的和为
所以正确答案是 D。
We have that A is the same as
B reduces to
C adds up to
D however adds to
To make sure, we check that E has a sum of
Thus, D is the correct answer.
其他年份的第 3 题
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- 1986 AMC 8
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