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SAT模拟考试题:SAT数学练习题(19)

2016-08-11 17:01:57来源:网络

  SAT考试Grid-in数学习题参考答案

  Question 1: In the x,y plane, what is the distance between origin and the (4,3) point?

  Answer: 5

  Explanation: We apply Pythagoras' Theorem to the triangle created by the following points: (4,3), (4,0) and (0,0).

  The distance between origin and the (4,3) point is equal to 5, as the other 2 sides of this right triangle are 4 and 3.

SAT模拟考试题:SAT数学练习题

  Question 2: The sum of 4 consecutive integers is 26. What is the product of the 4 numbers?

  Answer: 1680

  Explanation: If m is the least of the integers, m + (m + 1) + (m + 2) + (m + 3) = 26

  4m + 6 = 26

  m = 5, so the 4 consecutive numbers are 5, 6, 7, 8.

  Their product is 5·6·7·8 = 1680

  Question 3: 60% of the players of a team score 5 points each during a basketball game, 30% of players score 1 point each, and 10% score 7 points each. What is the average number of points scored by the players of the team?

  Answer: 4

  Explanation: n being the number of players, 60% of the players is .6·n, 30% of the players is .3·n and 10% of the players is .1·n.

  The numbers of points scored by players that scored 5 points is (.6·n)·5.

  The numbers of points scored by players that scored 1 point is (.3·n)·1.

  The numbers of points scored by players that scored 7 points is (.1·n)·7.

  The total number of points will be (.6·n)·5 + (.3·n)·1 + (.1·n)·7 = 4·n and the average number of points = ( total number of points)/number of players = 4·n/n = 4

  Question 4: If f(x) = x - 1, what is the value of x that satisfies the equality f(x) - 1 = f(x2) - x2

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本文关键字: SAT模拟考试 SAT数学

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