※ 引述《amateurptt (剩自己了...)》之铭言： : ========================================================================= : 3. A certain taxi company charges $3.10 for the first [?] of a mile : plus $0.40 for each additional of a mile. What would this company : charge for a taxi ride that was 8 mile long? : (A)$15.60 : (B)$16.00 : (C)$17.50 : (D)$18.70 : (E)$19.10 : ans:D : 我的解法如下,请各位帮我看哪有出问题 : 3.10 + 7*0.40 但是与答案差相当多,我看错题目吗? 这题应该是题目不完全,PP里面有出现[?]的就表示有缺的图档 : ============================================================================ : 4.In a stack of boards at a lumber yard, the 20th board counting from : the top of the stack is immediately below the 16th board counting from : the bottom of the stack. How many boards are in the stack? : (A)38 : (B)36 : (C)35 : (D)34 : (E)32 : ans:D 想请问解题思路 这题首先要看的懂题目在问什麽,题目是说有一堆板子的堆叠,从最上面数下来的第20 块板子在从最下面数上来的第16块板子的下面;这题可以简化题型,你可以拿5个硬币 叠一叠,从上面数下来第4个硬币在从下面数上来的第三个硬币的下面,问总共有几个? : =========================================================================== : 18. 3 teaspoons = 1 tablespoons : 4 tablespoons = [?] cup : According to the information above, how many teaspoons are equal to [?] cup? : (A)3 : (B)4 : (C)9 : (D)12 : (E)18 : ans: E 一样想请问解题思路 同第三题的说明 : =========================================================================== : 33.If x^4 + y^4 = 100, then the greast possible value of x is between : (A) 0 and 3 : (B) 3 and 6 : (C) 6 and 9 : (D) 9 and 12 : (E) 12 and 15 : ans:B : 我原以为题目要x最大,所以就要y^4为0 : 也就是 直接求x^4=100 ,x的最小值为? : 但是答案不对,想请求正解! 你原本的想法没错,题目是要求x最大可能的值的范围为何？ x要为最大,所以y^4=0 x=3时,x^4=81 ------(1) x=4时,x^4=256 ------(2) 由(1)(2)可知x介於3到4之间,答案符合的就是(B) : ============================================================================ : 43.A committee of three people is to be chosen from four married couples. : What is the number of different committees that can be chosen if two people : who are married to each other cannot both serve on the committee? : (A)16 : (B)24 : (C)26 : (D)30 : (E)32 : ans:E : 我的解法是 : 4 2 : C * C = 8 四对couples中选出三对 * 两个人选一 : 3 1 : 似乎思路出了问题, 希望高手指正! 四对couples中选出三对*选出的三对中的每对选一人 也就是 4 2 2 2 C * * * = 32 3 1 1 1 --

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