2023年数学竞赛AMC8真题C卷(含答案)
展开1-10 题,每题 3 分
Kurt paved his curtyard in the pattern shwn. Hw many 1×1 pavers are in his curtyard?
Kurt 将庭院铺上图中的瓷砖。庭院中一共有多少块 1×1 的瓷砖?
(A)28(B)30(C)32(D)34(Е)36
Which f the fllwing expressins has the smallest value?
以下哪个算式的值最小?
(A)3+2(B)3-2(C)3×2(D)3÷2(E)32
The numbers n the tp crners f these five playing cards add t 21. What is the number n the hidden card?
右图中五张扑克牌左上角的数字之和为 21,被遮住的扑克牌上的数字是多少?
(A)2(В)3(C)5(D)7(Е)9
What is the value f x in this diagram?
图中 x 的值为?
(А)50(B)60(C)70(D)80(E)100
These tw clcks shw pening and clsing times f my lcal Marine Discvery Centre. Fr hw lng is it pen each day?
这两个时钟分别显示了海洋探索中心的开放和关闭时间。这个中心每天会开放多长时间?
(A)5 hurs and 40 minutes5 小时 40 分钟
(B)6 hurs and 20 minutes6 小时 20 分钟
(C)6 hurs and 40 minutes6 小时 40 分钟
(D)7 hurs and 20 minutes7 小时 20 分钟
(E)7 hurs and 40 minutes7 小时 40 分钟
What is the value f
2 3 4 等于多少?
7 8 9
2 3 4 ?
7 8 9
(A) 1(B) 2(C) 3(D) 4(E) 1
67892
Hw many 25cm×25cm squares fit in a 50cm×1m rectangle?
有多少个 25cm×25cm 的正方形可以完全放入 50cm×1m 的长方形?
(A)1(B)2(C)4(D)6(E)8
This graph shws the water stred in my rainwater tank last May.
What was the increase in water in the tank between the 10th and the 30th f May?
如图所示,今年 5 月份水箱中存储的水量情况。
5 月 10 日到 30 日之间水箱中的水量增加了多少?
(A)32kL(B)37kL(C)40kL(D)42kL(E)43kL
The sum f the ages f Ali, Bey and Cam is 32 years. What will be the sum f their ages in 3 years time?
Ali、Bey 和 Cam 三个人的年龄之和为 32 岁。请问 3 年后他们的年龄之和是多少?
(A)33years 33 岁(B)35 years 35 岁(C)38 years 38 岁
(D)41 years 41 岁(E)96 years 96 岁
A parallelgram PQRS has an area f 60 cm2 and side PQ f length 10 cm. Which length is 6cm?
如图所示,平行四边形 PQRS 的面积为 60cm2,边 PQ 的长度为 10cm。
请问哪条线段的长度是 6cm?
(A)RQ(B)RS(C)QT(D)PT(E)QS
Questins 11 t 20 are wrth 4 marks each.
11-20 题,每题 4 分
Mei can travel t her grandma's huse by a direct rute, r by a scenic rute that is 5 km lnger. When she travels by the scenic rute, and cmes directly hme, the rund trip is 35 km. Hw lng is the direct rute?
小梅可以选择一条直达路线或者选择一条风景优美的路线去奶奶家,风景优美的路线比直达路线长 5km,如果她选择风景优美的路线去奶奶家并选择直达路线回家,来回路程一共为
35 km。请问直达路线有多远?
(A)5km(B)12.5km(C)15km(D)20km(E)22.5km
In the game f Nurdle, players try t guess a three-digit number. After each guess, the digits are marked with ne f the fllwing three symbls:
√ if the digit is crrect and in the right place
if the digit is crrect, but is nt yet in the right place
× if the digit is nt in the three-digit number at all.
Mike’s guesses s far are shwn.
Hw many different three-digit numbers fit the clues he has s far?
在 Nurdle 游戏中,玩家需要猜测一个三位数。每次猜测后,猜测的三位数的各位数字会用以下三种符号中的一种表示:
√ 表示这个数字正确且位置正确
表示这个数字正确,但是位置错误
× 表示这个数字不在这个三位数中目前 Mike 的猜测在图中。
有多少个不同的三位数符合目前已有的线索?
(A)5(B)6(C)7(D)8(E)9
In this triangle, the number in the centre f each side is the sum f the tw numbers at the ends f the sides.
What is the sum f the three numbers at the ends f the sides?
如图所示,三角形中,每条边中间的数字是两端数字之和。这三条边两端的三个数字之和是多少?
(А)46(B)52(С)59(D)64(E)68
A fuel tank is 40% empty. Then 40 litres f fuel is remved. The tank is nw 40% full. Hw many litres are in a full tank?
一个油箱的 40%是空的,取出 40 升油后,油箱的 40%是满的。这个油箱可以装满多少升油?
(А)40(B)100(C)160(D)200(E)400
The game Tutu uses 4 standard dice with ppsite faces adding t 7. The dice are rlled and randmly arranged int a 2×2 blck.
A blck's scre is the sum f the 4 numbers shwing n tp plus the sum f the 8 numbers shwing arund the utside.
What is the largest pssible scre fr the blck shwn?
游戏 Tutu 会用到 4 枚标准骰子,每枚骰子相对面的点数之和都为 7。投掷骰子并将骰子随机排列成 2×2 组合方块。组合方块的得分是顶面显示的 4 个点数与四周显示的 8 个点数之和。对于图中的组合方块,得分的最大可能值为?
(A)44(B)46(C)48(D)50(E)52
The five clcks belw are all shwing the wrng time. One clck is 3 minutes away frm the crrect time and anther is 7 minutes away.
Which clck is clsest t the crrect time?
这五个时钟显示的时间都是错误的。其中一个与正确时间相差 3 分钟,另一个时钟与正确时
间相差 7 分钟。哪个时钟最接近正确时间?
I wrte a list f all multiples f 7 between 1 and 500. Then I lked at the last digit f each number in my list.
Which digit appeared mst ften as the last digit?
我列出了 1 到 500 之间 7 的所有倍数,观察数列中每个数的最后一位数。哪项是最后一位数中出现频率最高的数字?
(A)1(B)3(C)7(D)9
(E)Nne f(A)-(D), because there is n single last digit that appears mst ften
以上均不正确,因为最后一位数中没有出现频率最高的数字
Amy designed this rectangular flag fr her fleet f yachts. What fractin f the flag is shaded? Amy 为游艇舰队设计了长方形旗帜。阴影部分的面积占旗帜总面积的几分之几?
(A) (B) (C) (D) (E)
T unlck a security dr, Daniyal enters a cde n the keypad shwn. T make it easy t remember:
the cde has 10 digits
the cde uses every digit exactly nce
the cde steps frm buttn t buttn nly if the tw buttns tuch
the cde is as large as pssible.
What are the last 3 digits in Daniyal’s cde?
为了打开一扇安全门,Daniyal 在如图所示的键盘上输入一串密码。为了方便记忆:
这个密码由 10 个数字组成
这个密码使用每个数字恰好一次
这个密码只能从一个按键上的数字到另一个相邻按键上的数字
这个密码的数值尽可能大
密码的最后 3 个数字是多少?
(A)0(B)1(C)2(D)6(E)7
Jake had 3 times as many gld ballns as blue ballns, and n ther clurs. Then sme blew away, leaving him with 5 times as many blue ballns as gld ballns.
What is the smallest number f ballns that Jake culd have started with?
Jake 的金色气球数量是蓝色气球的 3 倍,且没有其他颜色的气球。有一些气球被吹走了,剩下的气球中,蓝色气球是金色气球的 5 倍。
请Jake 刚开始最少有多少个气球?
(A)15(B)20(C)24(D)30(E)100
Questins 21 t 25 are wrth 5 marks each.
21-25 题,每题 5 分
Li attempted t multiply a single-digit number by 36, but he accidentally multiplied by 63 instead. His answer was 189 larger than the crrect answer.
What was the crrect answer t the multiplicatin?
小李尝试将一个一位数乘以 36,但他不小心将这个一位数乘以了63。结果比正确结果大189。这个乘法计算的正确结果是多少?
(A)180(B)189(C)216(D)252(E)288
The numbers frm 1 t 12 are t be placed n the vertices f the 5 intercnnected squares in this diagram. The sum f the 4 vertices f any f the 5 squares is a cnstant. What is this cnstant? 把数字 1 到 12 放置在右图中 5 个相互连接的正方形的顶点上。每个正方形的 4 个顶点上的
数字之和都是一个常数。这个常数是多少?
(A)26(B)28(C)30(D)32(E)34
Ann is running rund her favurite running curse at a steady pace f 5 minutes per kilmetre. She passes a marker which she knws is ne-quarter f the way rund. One minute and 40
secnds later, she passes anther marker which is ne-third f the way rund. Hw lng will it take her t run the whle curse?
安正在绕着她最喜欢的跑道以 5 分钟/公里匀速前进,她经过了一个标记牌,表示跑道的四
分之一。一分钟四十秒后,她经过了另一个标记牌,表示跑道的三分之一。跑完整个跑道需要多长时间?
18 minutes 18 分钟
20 minutes 20 分钟
20 minutes and 40 secnds 20 分钟 40 秒
22 minutes and 30 secnds 22 分钟 30 秒
24 minutes 24 分钟
Jaz unlcked a secret level in the game Numbercraft. She entered a 6-digit cde where the sum f the first three digits equals the sum f the last three digits. Further, she gained a bnus, since her cde had fur 7s in a rw.
Fr instance, she culd have entered 077770.
Hw many different cdes culd she have entered t get the secret level and the bnus?
杰解锁了Numbercraft 游戏的一个秘密等级。她输入了一个六位数密码,其中前三位数字之和等于后三位数字之和。因为她的密码中有四个连续的数字 7,她还得到了额外奖励。例如,她输入的密码可能是 077770。
为了解锁秘密等级和获得奖励,她可以输入多少个不同的密码?
(А)10(B)18(С)20(D)27(E)64
Tw identical dice have faces labelled A, C, H, M, S and T.
The diagram shws what they lk like when placed in frnt f a mirrr, but the reflectin f the secnd dice has been left blank.
What des the reflectin f the secnd dice lk like?
两枚相同骰子的六个面上分别标记有 A、C、H、M、S 和T。下图中将它们放在镜子前呈现的图像,但第二枚骰子的图像是空白的。
下列哪项是第二枚骰子在镜子中的图像?
Fr questins 26 t 30, clur in the bubbles n the answer sheet t recrd whle-number answers frm 0 t 999. Questins 26 t 30 are wrth 6, 7, 8, 9 and 10 marks respectively.
26 题至 30 题的答案为 0 至 999 的整数,请正确填涂在答题卡上。第 26 题占 6 分,第 27 题
占 7 分,第 28 题占 8 分,第 29 题占 9 分,第 30 题占 10 分。
I start with a number, multiply it by 10, and then subtract a multiple f 9 that is less than 100. My answer is 5347. What number did I start with?
我先将某个数字乘以 10,减去一个小于 100 的 9 的倍数,最终结果是 5347。起始数字是多少?
Amelia nticed that the names f three friends, Mei, Emma and Liam, were all made frm
letters f 'Amelia'. She chse different values frm 0 t 9 fr each f A, E, I, L
M E I E M M A L I A M
and M s that
What is the largest pssible value f A M E L I A ?
阿梅莉亚注意到三个朋友梅、艾玛和莉安姆的名字都是由“Amelia”中的字母组成的。她给
A、E、I、L 和 M 中的每个字母选定了从 0 到 9 之间不同的值,使得
M E I E M M A L I A M A M E L I A 的最大可能值为?
There are three sets f three parallel lines in a plane. Lines in different sets are nt parallel, and every pair f nn-parallel lines intersect. The diagram shws ne way t d this, but fr ther arrangements the number f pints f intersectin varies.
Find the largest pssible number f intersectin pints and the smallest pssible number f intersectin pints, then multiply these tw numbers.
一个平面上有三组平行线,每组各三条平行线。不同组中的线是不平行的,每对非平行线会相交。图中显示了一种可能的方式,但对于其他排列方式,交点的数量各不相同。
交点数量的最大可能值和最小可能值之积是多少?
A tw-digit number has the prperty that when it is divided by the sum f its digits the result is 4 with remainder 3. What is the sum f all tw-digit numbers with this prperty?
一个两位数具有这些性质:当这个两位数除以它的各位数字之和时,商为 4,余数为 3。具
有这个性质的所有两位数之和是多少?
Dnna likes all numbers that are nt divisible by 3 and Sandra likes all numbers that have n digits divisible by 3. Hw many fur-digit numbers are there that bth Dnna and Sandra like?
多娜喜欢不能被 3 整除的所有数字,桑德拉喜欢各个数位上的数字都不能被 3 整除的所有数字。有多少个四位数是多娜和桑德拉都喜欢的数字?
澳AMC
Middle Primary
Answer
澳AMC
Middle Primary
Answer
澳AMC
Middle Primary
Answer
1
A
11
C
21
D
2
B
12
C
22
A
3
A
13
D
23
B
4
A
14
D
24
C
5
B
15
B
25
E
6
C
16
B
26
541
7
E
17
C
27
34
8
A
18
E
28
351
9
D
19
A
29
164
10
D
20
B
30
810
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