PREP-MATH-PS1完整详解版-V20.doc

PP- Problem Solving1 (PS1) 完整詳解版 V2.0 作者: pauline_chiou william0625 gman yuma168 備註：本版權內容歸 作者 和 論壇共有，嚴禁任何未經允許的商業使用。 Revised History 由於這是眾人一起完成的,難免會有疏失,希望大家可以一起修正錯誤,讓這份詳解變得更完整! 版本增加規則如下: 修正算式錯誤or提出更好的算法, 請把版本小數+1 (Ex: V1.0 - V1.1) 增加or補齊題目,請把版本個位數+1 (Ex: V2.0 -V3.0) 版本 修正內容 (請標題號) 作者 日期 V1.0 新增全部詳解 (Q1~Q196) pauline_chiou william0625 gman yuma168 2008-07-01 V1.1 Update Q36,Q51,Q57,Q139,Q142,Q143 larry.tw edas9101 2008-08-29 V2.0 5,6,11,13,14,15,17,18,25,28,29,31,37,38,46,47,50,55,56,59,61,62,63,67,72,78,80,83, 87,91,92,93,97,102,103,107,112,113,114,119,120,121,125,128,129,131,133,150,158,162,168,173,176,177,179,182,187,191,190,193, iamsmall 2008-11-09 Practice Test #1 Problem Solving (196 Questions) 1. 409-!-item-!-187;#058000306 A grocery store purchased crates of 40 oranges each for $5.00 per crate and then sold each orange for $0.20. What was the stores gross profit on each crate of oranges? (A) $3.00 (B) $6.00 (C) $8.00 (D) $10.00 (E) $13.00 【答案】A 【思路】revenue=cost+profit, 假設X為 the stores gross profit on each crate of oranges 0.2x40 (sold each orange for $0.20)=5( per crate)+X 8=5+X, X=3 2. 455-!-item-!-187;#058000316 The product P of two prime numbers is between 9 and 55. If one of the prime numbers is greater than 2 but less than 6 and the other is greater than 13 but less than 25, then P = (A) 15 (B) 33 (C) 34 (D) 46 (E) 51 【答案】E 【思路】前提是p是兩個”質數”的乘積 one of the prime numbers is greater than 2 but less than 6 包含3,5 the other is greater than 13 but less than 25 包含 17,19,23 p 可能為51,57,69,85,95,115 (又9p55),故答案 E 3. 664-!-item-!-187;#058000504 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 fo