[計量] 好多題計量請教

看板GRE (GRE入學考試)作者balance9235 (退伍變米蟲)時間15年前 (2011/01/15 21:15)推噓1(1推 0噓 2→)

留言3則, 2人參與討論串9/26 (看更多)

1. A rectangular solid has a volume of 30, and its edges have integer lengths. What is the greatest possible surface area of this solid? (A) 82 (B) 86 (C) 94 (D) 122 (E) 180 ANS:(D) 我算1.3.10表面積94 2. Which of the following is the second power of sqrt(1+√1) (A) 1 (B) √2 (C) 2 (D) 4 (E) 1+√2 ANS:(C) 我算1+√1 3. In the xy-plane, line l passes through the origin and is perpendicular to the line 4x + y = k, where k is a constant. If the two lines intersect at the same point (t, t+1), what is the value of t? (A) 4/3 (B) 5/4 (C) 3/4 (D) -5/4 (E) -4/3 ANS:(E) 4. A bag contains red gloves, black gloves, ans white ones. What is the LEAST number of gloves that must be taken out of the bag to be sure of having 4 pairs of gloves? (A) 6 (B) 8 (C) 9 (D) 10 (E) 12 ANS:(D) 原本有幾雙也不知道.... 5. Each of the following numbers has one digit blotted out. Which of the numbers CANNOT be a sum of two consecutive odd integers? (A) 2,□24 (B) 3,□32 (C) 4,□44 (D) 5,□54 (E) 6,□68 ANS:(D) 不知道怎麼判斷 6. If p, q, r represent different positive integers, and pqr = 2009, what is the greatest result of p + q + r? (A) 49 (B) 55 (C) 91 (D) 295 (E) 2011 ANS:(D) 7. If two cards are drawn drom a deck without replacement, the probability that both are aces is (A) 1/26 (B) 7/52 (C) 16/2652 (D) 12/2652 (E) 12/103 ANS:(D) 我的式子列 (C4取2*C13取1)/C52取2 8. In the xy-plane, the coordinates of △ABC are (0,0), (4,1) and (2,4), respectively. What is the area of △ABC? (A) 4 (B) 5 (C) 6 (D) 7 (E) 8 ANS:(D) 邊長有根號不知道怎麼用三邊長求面積 9. In the xy-plane, O is the center of circle with coordinate (m,4), and a point (m,-1) is on the circle. Column A Column B The circumference 32 of circle O. ANS:B 10. At the corporate headquarters of a large enterprise, outside each office there is a keyboard, on which there are two letters, A and B, and digits from 0 to 9, inclusive. To gain entrance to an office, an employee must punch in an access code. If a code consists of the letter A or B followed by either 2 or 3 different digits, how many different access codes are there? (A) 2,200 (B) 2,000 (C) 1,620 (D) 1,560 (E) 1,440 ANS:(C) C2取1*C10取2 + C2取1*C10取3不對今天題目比較少，一樣要麻煩大家了！ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 124.8.129.147 ※ 編輯: balance9235 來自: 124.8.129.147 (01/15 21:43)