2018-08-27 重点归纳
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:
What is the sum of the distinct prime integer divisors of  ?
?

The prime factorization is  . Since the problem is only asking us for the distinct prime factors, we have
. Since the problem is only asking us for the distinct prime factors, we have  . Their desired sum is then
. Their desired sum is then  .
.
Suppose that  means
 means  What is the value of
 What is the value of  if
 if![\[2 * (5 * x)=1\]](/public/uploads/ueditor/20180827/1535350661419443.png)

Let us plug in  into
 into  . Thus it would be
. Thus it would be  . Now we have
. Now we have  . Plugging
. Plugging  into
 into  , we have
, we have  . Solving for
. Solving for  we have
 we have
![\[x=\boxed{\textbf{(D)}   \,        10}\]](/public/uploads/ueditor/20180827/1535350680456206.png)
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!
 
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