老师的烦恼SAT数学练习13

2020年11月25日发(作者：萧永祺)
1. A store holiday sale has an item marked down by $$10 with an additional discount
of 25% of the new price. If the final price was $$36.27, what was the original?

A. $$19.70
B. $$48.36
C. $$58.36
D. $$61.93


2. A school has 63% girls and 37%37% boys. If 23% of the girls wears contacts and 42% of
the boys wears contacts, what percent of all students wears contacts?

A. 14.5%
B. 15.5%
C. 30.0%
D. 75.0%



3. Allegra and Simeon were selling containers of cookie dough for a charity event. In the
first week, Allegra sold 30% more than Simeon did. The following week, Allegra
sold 12 containers of cookie dough, while Simeon sold none. If Allegra sold 40% more
containers than Simeon did overall, how many did Simeon sell in total?





Correct answer: 120

4. In a community service class in the fall, 3 of the 15 class sessions were lectures, while all
others were devoted to fieldwork in parks. In the spring, the number of sessions devoted
to fieldwork remained the same, but the total number of sessions increased to 18. What
percent of class sessions were lectures in the spring?
Sample answers list:
an integer, like 6
a simplified fraction number, like 3/5
a simplified improper fraction, like 7/4
an exact decimal, like 0.75
LEVEL 3

A. 16.7%
B. 33.3%
C. 66.7%
D. 83.3%


5. On Monday, a fruit vendor bought 80 pieces of fruit to sell at her market, 35% of which
were apples and the rest of which were oranges. On Tuesday, the vendor bought the same
number of oranges, but she only bought 73 pieces of fruit. On Tuesday, what percentage
of the fruit she bought was apples?

A. 28.8%
B. 38.3%
C. 65.0%
D. 71.2%

6. A student answered 86 problems correctly, which was 81.9% of the total number of
problems on the test. How many problems did the student answer incorrectly?

A. 4
B. 19
C. 86
D. 105


7. Fabrizzio went shopping on Tuesday and decided to purchase a pair of pants that
is 15% off the regular price for the rest of the week. If he buys the pants on Tuesday, he
will receive an additional 5% off. What percent would Tuesday's sale price be of the
original price for the pants?

A. 81%
B. 85%
C. 95%
D. 105%


8. In a college philosophy class during the fall semester, there were 323 students, 42% of
whom were male and the rest of whom were female. In the spring semester, the same
number of females was in the class as in the fall, but there were only 298 total students in
the class. In the spring, what percent of students were female?
A. 46%
B. 58%
C. 63%
D. 92%


9. A taxi ride cost a customer a total of $$13.73, which included 4% sales tax and then a $$1
surcharge. What was the subtotal before the surcharge and sales tax?

A. $$0.51
B. $$12.24
C. $$13.24
D. $$318.25


10. In the United States House of Representatives, 12.2% of congresspeople are from the
State of California. If there are 435 voting congresspeople, how many are not from
California?

A. 12.2
B. 53
C. 382
D. 488



11. A chef has a large container of olive oil. In one night, after he used 25 quarts, 35.9% of
the oil remained. How many quarts of olive oil remained in the container?





Correct answer: 14

12. In 2004, the number of people aged 16 years or older in the United States
was 223,357,000. According to the Bureau of Labor Statistics, at that time 66% of the
population aged 16 and older was employed, and women made up about 46.4% of this
category. Approximately how many women aged 16 and older were employed in 2004?

A. 68,400,000
B. 104,000,000
C. 147,400,000
D. 157,000,000

13. One study estimated that bears populate the Kenai Peninsula of Alaska at a rate
of 42 bears per 1000

of available habitat. According to this study, about how many bears
would you expect to find in a habitable region of this peninsula 8500

in size?

A. 24
B. 200
C. 357
D. 3035


14. The strength of a magnetic field is measured in teslas. One tesla is equal to one weber per
square meter, as follows:






Divya is building a circuit for her physics class. Point P on one of her wires has a
an integer, like 6
a simplified fraction number, like 3/5
a simplified improper fraction, like 7/4
an exact decimal, like 0.75
LEVEL 3