[計量] PP1-PS 3.4.18.33.43題

看板GMAT (GMAT入學考試)作者amateurptt (剩自己了...)時間16年前 (2008/06/16 20:12)推噓1(1推 0噓 0→)

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========================================================================= 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,請各位幫我看哪有出問題 3.10 + 7*0.40 但是與答案差相當多,我看錯題目嗎? ============================================================================ 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 想請問解題思路 =========================================================================== 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 一樣想請問解題思路 =========================================================================== 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 我原以為題目要x最大,所以就要y^4為0 也就是直接求x^4=100 ,x的最小值為? 但是答案不對,想請求正解! ============================================================================ 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 四對couples中選出三對 * 兩個人選一 3 1 似乎思路出了問題, 希望高手指正! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.122.0.196