下面是2013年11月9日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。大家和无忧小编一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之数学---选择：

　　Mathematics > Standard Multiple Choice

　　Read the following SAT test question and then click on a button to select your answer.

　　The sum, product, and average (arithmetic mean) of three integers are equal. If two of the integers areand, the third integer is

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is D

　　Explanation

　　You have three integers,,, and, whose sum, product, and average are equal. Sinceis one of the numbers, the product is. So the sum and average are also equal to. Therefore,, and.

　　下面为大家提供一些和这些SAT官方每日一题相似的题目，供大家练习：

　　In a class ofseniors, there areboys for everygirls. In the junior class, there areboys for everygirls. If the two classes combined have an equal number of boys and girls, how many students are in the junior class?

　　(A) 

　　(B) 

　　(C) 

　　(D) 

　　(E) 

　　The correct answer is D

　　Explanation

　　Among theseniors, there areboys for everygirls, soof the seniors, or, are boys and, or, are girls. Among the juniors,are boys andare girls. Ifstands for the total number of juniors, thenare boys andare girls. The total number of senior and junior boys is. The total number of senior and junior girls is. The question states that these quantities are equal, so. Solving this gives, or　.

　　以上就是关于2013年11月9日SAT官方每日一题中数学部分的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。