AMC数学竞赛8专为8年级及以下的初中学生设计，但近年来的数据显示，越来越多小学4-6年级的考生加入到AMC 8级别的考试行列中，而当这些学生能在成绩中取得“A”类标签，则是对孩子数学天赋的优势证明，不管是对美高申请还是今后在数学领域的发展都极其有利！那么接下来跟随小编来看一下AMC 8的官方真题以及官方解答吧：

Problem 7

Which of the following numbers is not a perfect square?

Solution

We know that our answer must have an odd exponent in order for it to not be a square. Because  is a perfect square,  is also a perfect square, so our answer must be .

Problem 8

Find the value of the expression

Solution

We can group each subtracting pair together:After subtracting, we have:There are  even numbers, therefore there are  even pairs. Therefore the sum is 

Solution 2

Since our list does not end with one, we divide every number by 2 and we end up withWe can group each subtracting pair together:There are now  pairs of numbers, and the value of each pair is . This sum is . However, we divided by  originally so we will multiply  to get the final answer of 

以上就是小编对AMC竞赛官方真题以及解析的介绍，希望对你有所帮助，更多AMC真题下载请持续关注AMC数学竞赛网！