下面是2012年12月23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.

　　A woman drove to work at an average speed ofmiles per hour and returned along the same route atmiles per hour. If her total traveling time washour, what was the total number of miles in the round trip?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is C

　　Explanation

　　Letrepresent the time it took the woman to drive to work. Since her total traveling time washour, the time it took her to return home is. The distance in miles can be found using the formula. The distance traveled to work is, and the return distance is. Since the distance to work is the same as the return distance,. Solving foryields. So the distance one way ismiles. The total number of miles in the round trip is, ormiles.

　　下面是一道和SAT官方每日一题相似的题目，供大家练习：

　　A gasoline tank on a certain tractor holds gallons of gasoline. If the tractor requires gallons to plow acres, how many acres can the tractor plow with a tankful of gasoline?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is A

　　Explanation

　　In the question, you are told that gallons of gasoline can plow acres and you are asked to find how many acres, call it , can be plowed by gallons. You can set up a ratio of the number of gallons of gasoline used to the number of acres plowed. Therore, you have . Cross-multiplying and solving for gives you the answer of acres, or acres.

　　以上就是关于2012年12月23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。

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