========================================================================= 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? ============================================================================ 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 =========================================================================== 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 =========================================================================== 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! ============================================================================ 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! --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 122.122.0.196 ※ 编辑: amateurptt 来自: 122.122.8.249 (06/17 21:34)