2018年AMC10真题PDF下载（A卷）
1.What is the value of（（（2+1）-1 +1）-1+1）-1+1？
A.5/8
B.11/7
C.8/5
D.18/11
E.15/8
2.Liliane has 50% more soda than Jacqueline, and Alice has 25% more soda than Jacqueline. What is the relationship between the amounts of soda that Liliane and Alice have?
Liliane has 20% more soda than Alice.
Liliane has 25% more soda than Alice.
Liliane has 45% more soda than Alice.
Liliane has 75% more soda than Alice.
Liliane has 100% more soda than Alice.
3.A unit of blood expires after 10!=10.9.8......1seconds. Yasin donates a unit of blood at noon of January 1. On what day does his unit of blood expire?
A.January 2
B.January 12
C.January 22
D.February 11
D.February 12
4.How many ways can a student schedule 3 mathematics courses -- algebra,geometry, and number theory -- in a 6-period day if no two mathematics courses can be taken in consecutive periods? (What courses the student takes during the other 3 periods is of no concern here.)
A.3
B.3
C.12
D.18
E.24
5.Alice, Bob, and Charlie were on a hike and were wondering how far away the nearest town was. When Alice said, "We are at least 6 miles away," Bob replied, "We are at most 5 miles away." Charlie then remarked, "Actually the nearest town is at most 4 miles away." It turned out that none of the three statements were true. Let d be the distance in miles to the nearest town. Which of the following intervals is the set of all possible values of d?
A.(0,4)
B.(4,5)
C.(4,6)
D.(5,6)
E.(5,∞）
6.Sangho uploaded a video to a website where viewers can vote that they like or dislike a video. Each video begins with a score of 0, and the score increases by 1 for each like vote and decreases by 1 for each dislike vote.At one point Sangho saw that his video had a score of 90, and that 65% of the votes cast on his video were like votes. How many votes had been cast on Sangho's video at that point?
A.200
B.300
C.400
D.500
E.600
7.For how many (not necessarily positive) integer values of n is the value of 400*(2/5)n an integer?
A.3
B.4
C.6
D.8
E.9
8.Joe has a collection of 23 coins, consisting of 5-cent coins, 10-cent coins, and 25-cent coins. He has 3 more 10-cent coins than 5-cent coins, and the total value of his collection is 320 cents. How many more 25-cent coins does Joe have than 5-cent coins?
A.0
B.1
C.2
D.3
E.4
余下的题目省略！
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