[計量] 一堆計量問題

看板GRE (GRE入學考試)作者peilinchen (peilin)時間17年前 (2008/10/19 14:03)推噓0(0推 0噓 0→)

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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 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 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?) 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 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?) 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?) 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 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 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 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 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 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 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 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 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 59.112.12.208