SAT数学难题汇总.pdfVIP

x^2 表示x 的平方，= ！表示不等于。pi 表示圆周率    类型1：  20. The least integer of a set of consecutive integers is -25. If the sum of these integers is 26, how many integers are in this set? (A) 25 (B) 26 (C) 50 (D) 51 (E) 52   14. Exactly 4 actors try out for the 4 parts in a play. If each actor can perform any one part and no one will perform more than one part, how many different assignments of actors are possible?   16. Set X has x members and set Y has y members. Set Z consists of all members that are in either set X or set Y with the exception of the k common members (k 0). Which of the following represents the number of members in set Z ? (A) x + y + k (B) x + y - k (C) x + y + 2k (D) x + y - 2k (E) 2x + 2y - 2k      20. There are 75 more women than men enrolled in Linden College. If there are n men enrolled, then, in terms of n, what percent of those enrolled are men? 1 / 18  17. A merchant sells three types of clocks that chime as indicated by the check marks in the table above. What is the total number of chimes of the inventory of clocks in the 90-minute period from 7:15 to 8:45 ?         18. If the 5 cards shown above are placed in a row so is never at eithe end, how many different arrangements are possible?   20. When 15 is divided by the positive integer k, the remainder is 3. For how many different values of k is this true? (A) One (B) Two (C) Three (D) Four (E) Five      17. On the number line above, there are 9 equal intervals between 0 and 1. What is the value of x ?   19. If a, b. c, and f are four nonzero numbers, then all of the following proportions are equivalent