※ 引述《peilinchen (peilin)》之銘言：
: 還是有一堆問題需要請教各位高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
每個口袋都至少一個，彼此數量都不能相同，最少就是分別放1.2.3.4.5coins
總共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怎麼乘個位數都是6，5^77怎麼乘個位數都是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
: 我選B 做法是 60×4=240 240÷4=60 60×10=600 (請問我那裡做錯了?)
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
設邊長為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在說什麼?)
Column A沒有說總共到底用了幾個S.T去疊，所以總高度未知，無從比較
GRE很多這類題目，你看起來好像不知所云
可是其實是他故意給條件不足
: 6. r > s/3 > 0
: Column A Column B
: r s
: Ans: D (我選B column B較大 為什麼不對呢?)
隨便舉兩個例子
if r=1, s=1...相等
if r=2, s=1...Column A大
所以不一定誰大
: 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
純粹考你英文邏輯能力
7 less than 5x-->5x-7
is--> =
5 more than the product of 3 and x--> 5+3x
結合起來 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
對不起
這題我看不懂你題目表達是什麼
: 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
條件不足不能算
再檢查一下有沒有漏打什麼條件吧
照答案來看的話QRS是等腰直角
但從題意無法得知
: 圖表題
: 圖表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
: 圖表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
: 圖表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
從表1
fuel跟oil四年花了4500，再從表3每加侖1.5
所以四年用了3000加侖
平均一年750加侖
表1又說一年跑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一年一人會花1521
但car pool兩人的話一人可以省700
1521-700＝821-->一人一年的花費
題目問兩人總花費，821X2=1642
: 另一組圖表題
: 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
設每股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
如果當年earn比sales乘百分之20多就算
只有1973.1974有達到
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※ 編輯: nrtc 來自: 140.129.62.151 (10/19 14:55)
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