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2017年1月4日SAT官方每日一题---数学选择.

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  下面是2014年1月4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。大家和澳际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.

  Addtoand then subtractfrom the sum. Ifis a positive integer, the result must be an integer multiple of

  (A)

  (B)

  (C)

  (D)

  (E)

  The correct answer is B

  Explanation

  The mathematical expression given in the question is, which is equivalent to. The expressioncan be factored as. For every positive integer,must be a multiple of. If, then, which is not an integer multiple of,,, or. Therore, the correct answer is.

  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:

  A machine can insert letters in envelopes at the rate ofper minute. Another machine can stamp the envelopes at the rate ofper second. How many such stamping machines are needed to keep up withinserting machines of this kind?

  (A)

  (B)

  (C)

  (D)

  (E)

  The correct answer is A

  Explanation

  First you can changeminute toseconds so that the ratios are both in envelopes per second. One inserting machine inserts letters at the rate ofperseconds, orper second. Somachines would insertletters per second.

  Letbe the number of stamping machines needed to keep up withinserting machines. Then, since one machine stampsenvelopes per second,machines stampenvelopes per second. You can write the equation, which gives.

  以上就是关于2014年1月4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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