SAT数学真题和答案解析

2022-06-02 10:26:35

  解析!想要提升SAT数学水平,大家就需要多进行各类真题的练习,通过这种刷题式的练习,能够辅助大家更好地来掌握SAT数学知识考点,以及答题的技巧等等。下面小编就整理了一些真题,供大家参考。

  1. After being dropped a certain ball always bounces back to 2/5 of the height of its previous bounce. After the first bounce it reaches a height of 125 inches. How high (in inches) will it reach after its fourth bounce?

  A. 20

  B. 15

  C. 8

  D. 5

  E. 3.2

  2. n and p are integers

  5n is the square of a number

  75np is the cube of a number.

  The smallest value for n + p is

  A. 14

  B. 18

  C. 20

  D. 30

  E. 50

  1.Correct Answer: C

  Explanation:

  If after each bounce it reaches 2/5 of the previous height, then after the second bounce it will reach 2/5 x 125. After the third it will reach 2/5 x 2/5 x 125. After the fourth it will reach 2/5 x 2/5 x 2/5 x 125. This cancels down to 2 x 2 x 2 = 8

  2.Correct Answer: A

  Explanation:

  The smallest value for n such that 5n is a square is 5. 75np can now be written as 75 x 5 x p. This gives prime factors.... 3 x 5 x 5 x 5 x p To make the expression a perfect cube, p will have to have factors 3 x 3 , and hence p =9 n + p = 5 + 9 = 14

  以上就是为大家整理的“SAT数学真题和答案解析”,希望通过上述内容的学习,帮助大家更好地来备考SAT数学考试,预祝大家在考试中取得更好地成绩。


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