GMAT数学典型题汇总(7)-智课教育.pdf

智 课 网 G M A T 备 考 资 料 GMAT数学典型题汇总 7 智课教育 收集并整理GMAT数学典型题汇总供考生参考 希望能够为目前正 在积极备考GMAT考试的同学带来帮助 106 If a certain sample of data has a mean of 20 0 and a standard deviation of 3 0 which of the following values is more than 2 5 standard deviations 2 5倍的 from the mean A 12 0 B 13 5 C 17 0 D 23 5 E 26 5 答案 A 几倍的标准差 就用平均值加减几倍的标准差 即为新的值域 110 The residents of Town X participated in a survey to determine the number of hours per week each resident spent watching television The distribution of the results of the survey had a mean of 21 hours and a standard deviation of 6 hours The number of hours that Pat a resident of Town X watched television last week was between 1 and 2 standard deviations 1 2倍的 below the mean Which of the following could be the number of hours that Pat watched television last week A 30 B 20 C 18 D 12 E 6 答案 D 82 Is 1 x2 y2 可用坐标抛物线看出 2 x y 答案 A 1 x2 y2 平方已將正負數的影響拿掉 等同於絕對值 選項 1 成立 2 x y 的情況下 y有可能為負數 如此一來y的絕對值不一定小於x 選項 2 不成立 99 If m 0 and n 0 is 相减 1 m 0 答案 C 100 In the rectangular coordinate system shown above does the line k not shown intersect quadrant II 1 The slope of k is 注意 答案是否定的 但只要确定 也是对的 2 The y intercept of k is 6 答案 A 110 If z n 1 what is the value of z 1 n is a nonzero integer 注意N可能是偶数 Z可能是负数的情况 2 z 0 答案 C 113 For a certain set of n numbers where n 1 is the average arithmetic mean equal to the median 1 If the n numbers in the set are listed in increasing order then the difference between any pair of successive numbers in the set is 2 2 The range of the n numbers in the set is 2