※ 引述《peilinchen (peilin)》之铭言： : 还是有一堆问题需要请教各位高ꐊ: Coins are put into 5 pockets so that each pocket contains at least : one coin, but no two pockets contain the same number of conins. : Column A Column B : The lease possible 16 : total number of coins : in the 5 pockets : Ans: B 每个口袋都至少一个，彼此数量都不能相同，最少就是分别放1.2.3.4.5coins 总共1+2+3+4+5＝15 : 2. Column A Column B : The value of the The value of the : units' digit in 6^47 units' digit in 5^77 : Ans: A 6^47怎麽乘个位数都是6，5^77怎麽乘个位数都是5 : 3. A certain photocopying machine can make 10 copies every 4 seconds. : At this rate, how many copies can the machine make in 6 minutes? : (A) 900 : (B) 600 : (C) 360 : (D) 240 : (E) 150 : Ans: A : 我选B 做法是 60×4=240 240÷4=60 60×10=600 (请问我那里做错了?) 60X6=360 360/4=90 90X10=900 : 4. In square PQRS, T is the midopint of side RS. If PT=8√5 : What is the length of a side of the square? : Q ┌───┐R : │ │ : │ ┤T (PT=8√5) : │ │ : P └───┘S : (A) 16 : (B) 6√5 : (C) 4√5 : (D) 8 : (E) 2√6 : ANS: A 设边长为x √( x^2+(1/2x)^2)=8√5 ,x=16 : 5. A size S spup can is 10 centimeters high and s size T soup can is : 12.5 centimeters high. : Column A Column B : The height of a stack 62.5 centimeters : of cans if each can is : size S except the can on : the bottom of the stack, : ehich is size T : Ans: D (看不懂column A在说什麽?) Column A没有说总共到底用了几个S.T去叠，所以总高度未知，无从比较 GRE很多这类题目，你看起来好像不知所云 可是其实是他故意给条件不足 : 6. r > s/3 > 0 : Column A Column B : r s : Ans: D (我选B column B较大 为什麽不对呢?) 随便举两个例子 if r=1, s=1...相等 if r=2, s=1...Column A大 所以不一定谁大 : 7. Whicj of the following equations can be use to find the value : of x if 7 less than 5x is 5 more than the product of 3 and x? : (A) 5x-7=5+3x : (B) 5x-7=5+(3+x) : (C) 7-5x=5+3x : (D) 7-5x=(5+3)x : (E) 7-5x+5=3x : Ans: A 纯粹考你英文逻辑能力 7 less than 5x-->5x-7 is--> = 5 more than the product of 3 and x--> 5+3x 结合起来 5x-7=5+3x : 8. (1+ x/x+1)- 1-x / x+1 = : (A) 0 : (B) 1 : (C) 1/x+1 : (D) x/x+1 : (E) -2x/x+1 : Ans: D 对不起 这题我看不懂你题目表达是什麽 : 9. The area of square PQST in the figure above is 100. : If QR=RS, what is the perimeter of ▲QRS? : R : Q ▲ S : P □ T : (A) 5√2+10 : (B) 20 : (C) 10√2 +10 : (D) 30 : (E) 20√2 +10 : ANs: C 条件不足不能算 再检查一下有没有漏打什麽条件吧 照答案来看的话QRS是等腰直角 但从题意无法得知 : 图表题 : 图表1 Average costs to operate three types of cars over a fpur-year peropd : ( based on 15,000 miles per year) : Standard Car Compact Car Subcompact Car : Purchase Price $8,000 $5,600 $4,800 : Interest 2,112 1,479 1,267 : Insurance 2000 2000 2000 : Maintenance/Tires 1120 1080 920 : Fuel/Oil 6429 4500 3000 : Subtotal 19661 14659 11987 : Resale Value -2000 -1400 -1200 : Total Cost to $17661 $13259 $10787 : 图表2 Average annual savings through car-pooling to work rather than : driving alone : annual savings per person : Type of Car Annual cost 2-persion 3-person 4-person 5-person : driving to car pool car pool car pool car pool : work alone : Standard $2491 $1146 $1544 $1719 $1843 : Compact 1870 860 1159 1290 1384 : Subcompact 1521 700 943 1050 1126 : 图表3 average daily cost of van-pooling to work : round-tip miles van pool cost per passenger : 20 $1.45 : 25 $1.54 : 30 $1.63 : 40 $1.81 : 50 $1.99 : 60 $2.17 : *Based on $1.50 per gallon for fuel : 1. If the cost of oil is neglible, what is the mileage (average : miles per gallon of fuel) of a compact car? : (A) 13 : (B) 18 : (C) 20 : (D) 25 : (E) 28 : ANs: C 从表1 fuel跟oil四年花了4500，再从表3每加仑1.5 所以四年用了3000加仑 平均一年750加仑 表1又说一年跑15000mi 15000/750=20mi/gallon : 2. If 2 people, who would otherwise be driving alone in subcompact cars, : drive in a 2-person car pool using subcompact cars, what is the total : of their average annual costs of transportation to work? : (A) $821 : (B) $1400 : (C) $1521 : (D) $1642 : (E) $2342 : Ans: D 看表2 subcompact一年一人会花1521 但car pool两人的话一人可以省700 1521-700＝821-->一人一年的花费 题目问两人总花费，821X2=1642 : 另一组图表题 : SLAES AND EARNINGS OF COMPANY X : sales Earnings : (in thousand of dollars) (in thousands of dollars) : 1973 30 6 : 1974 50 11 : 1975 80 8 : 1976 70 5 : 1977 60 10 : 1978 80 12 : 1979 90 11 : 1980 100 8 : 1. For the years 1974 50 1979 inclusive, what was the amount of the : greatest increase in sales for one year to the next? : (A) $5000 : (B) $10000 : (C) $12000 : (D) $30000 : (E) $80000 sales增加最多的是1974-1975，增加80-50＝30(千) : Ans: D : 2. If at the end of 1973 Company X sold 30,000 shares of common stock for : 35 times Company X's earnings for the year, what was the price of a : share of common stock at the time? : (A) $7.00 : (B) $10.00 : (C) $17.50 : (D) $35.00 : (E) $70.00 设每股x元 1973的earn是6000元 30000x=35X6000 x=7 : Ans: A : 3. If Company X considered a good year to be any year in which earnings : were at least 20 percent of sales, how many of the years shown were : good years? : (A) None : (B) One : (C) Two : (D) Three : (E) Four : Ans: C 如果当年earn比sales乘百分之20多就算 只有1973.1974有达到 --

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