代数也是
1. Brand R coffee costs $3.25 per pound and brand T coffee costs $2.50 per
pound.
The number of pounds of brand R in a mixture of brands R and T that costs
$3.00 per pound.
A. 1
B. 2
C 3
D 1.2
答案：D
2.A manufacture packages soap powder in container of three different sizes.
The amount of soap powder in a full large container could fill exactly 3 of the
medium containers or exactly 5 of the small containers. If an equal number of
small and larger containers are to be filled with the amount of soap powder that
would fill 90 medium containers, how many small containers will be filled?
A.25
B.27
C.30
D.45
E.55
答案：A
3.A rectangular floor 18 feet by 10 feet is to be completely covered with
carpeting that costs x dollars per square yard. In terms of x, how many dollars
will the carpeting cost? (1 yard = 3 feet)
A.20x
B.28x
C.60x
D.180x
E.540x
答案：A
4. A widow received 1/3 of her husband’s estate, and each of her three sons
received 1/3 of the balance. If the widow and one of her sons received a total
of $60,000 from the estate, what was the amount of the estate?
A.$90,000
B.$96,000
C.$108,000
D.$135,000
E.$180,000
答案：C
5.At 9:00 a.m. train T left the train station and two hours later train S
left the same station on a parallel track. If train T averaged 60 kilometers per
hour and train S averaged 75 kilometers per hour until S passed T, at what time
did S pass T?
A.2:00p.m
B.5:00p.m
C.6:00p.m
D.7:00p.m
E.9:00p.m
答案：D
6.The charge for a telephone call made at 10:00 a.m. from City Y to City X
is $0.50 for the first minute and $0.34 for each additional minute. At these
rates, what is the difference between the total cost of three 5-minute calls and
the cost of one 15-minute call?
A.$0.00
B. $0.16
C. $0.32
D. $0.48
E. $1.00
答案：C
7.A consumer insulates a house with material bought at 20 percent off the
list price of $370.If the consumer also receives a rebate of $25 from the
manufacturer of the material, how much does the material cost the consumer、
A. $238
B.$240
C.$263
D.$271
E.$325
答案：D
8.What was the original price of an item if a discount of 20 percent
reduced the price to $100?
A.$80
B.$120
C.$125
D.$150
E.$250
答案：C
9.Of the 400 cadets in a graduating class, 30 percent were women and, of
these, 1/5 became instructors. If the number of men who became instructors was
twice the number of women who became instructors, how many of the men became
instructors?
A.120
B.48
C.40
D.24
E.20
答案：B
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