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2013年8月23日SAT官方每日一题---数学选择

  下面是2013年8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。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.

  Ifx^negative 2 = 16, what is the value ofx^2?

  (A)1 over 16

  (B)1 over 4

  (C)2

  (D)4

  (E)12

  The correct answer is A

  Explanation

  Ifx^negative 2 = 16, then1 over x^2 = 16, sox^2 = 1 over 16.

  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:

  For how many positive two-digit integers is the ones digit greater than twice the tens digit?

  (A)16 

  (B)20

   (C)28 

  (D)32 

  (E)36 

  The correct answer is A

  Explanation

  The correct answer is (A). If the tens digit is1, there are7positive two-digit integers with the ones digit greater than twice the tens digit:13 comma 14 comma 15 comma 16 comma 17 comma 18and19. If the tens digit is2, there are5positive two-digit integers with the ones digit greater than twice the tens digit:25, 26, 27, 28and29. If the tens digit is3, there are3positive two-digit integers with the ones digit greater than twice the tens digit:37, 38and39. If the tens digit is4, there is1positive two-digit integer with the ones digit greater than twice the tens digit:. If the tens digit is equal to or greater than5, then the ones digits, which cannot be greater than9, is not greater than twice the tens digit. Therefore, there is a total of9+7+3+1=16positive two-digit integers for which the ones digit is greater than twice the tens digit.

  以上就是关于2013年8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。