2015年9月25日SAT官方每日一題

2015/09/25 瀏覽次數:2 收藏
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  標題範例:Mathematics > Standard Multiple Choice

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

  If P is an odd integer, which of the following is an even integer?

  (A)p-2

  (B)p²

  (C)p²-2

  (D)(p-2)²

  (E) p²-p

  謎底:E

  【剖析】If p is an odd integer, then p-2 and are odd integers. Similarly, choices (C) and (D) are odd integers. Since an odd integer subtracted from another odd integer is always an even integer, p²-p is even.