下面是是2012年3月10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。下面我们就一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之数学---选择：

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　　Mathematics > Standard Multiple Choice

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

　　The perimeter of a 7-sided figure is 15. If the length of each side of the figure is increased by 2 units, what is the perimeter of the new figure?

　　Answer Choices

　　(A) 17

　　(B) 22

　　(C) 24

　　(D) 29

　　(E) 30

　　The correct answer is D

　　Explanation

　　The perimeter is the sum of the lengths of all the sides. Since each of the seven sides is to be increased by 2, there will be a total increase of 14 in the perimeter. The original perimeter, 15, plus the increase, 14, gives the new perimeter, 29.

　　下面是一道和SAT官方每日一题相似的题目，供大家练习：

　　On the last day of a one-week sale, customers numbered through were waited on. How many customers were waited on that day? 

　　Answer Choices

　　(A)  

　　(B)

 　　(C)  

　　(D)  

　　(E)  

　　The correct answer is C

　　Explanation

　　The number of customers who were waited on that day is , as the total number of customers is those customers numbered to inclusive.