首页
登录
职称英语
In how many of the integers between 1 and 100 does the digit 5 occur exactly onc
In how many of the integers between 1 and 100 does the digit 5 occur exactly onc
游客
2024-01-12
7
管理
问题
In how many of the integers between 1 and 100 does the digit 5 occur exactly once?
选项
A、10
B、18
C、19
D、20
E、21
答案
B
解析
在1至100之间的数字中,5仅在它们中出现1次的整数有多少?
解:本题的正确答案是(B)。解答本题的关键是考生一定要记住5只能在这些数字中出现1次,5在其中出现两次的数字应排除掉,即5要么在个位,要么在十位,个位与十位都出现5的数字(55)应排除掉。个位上有5的数字是:5,15,25,35,45,65,75,85和95;十位上有5的数字是:50,51,52,53,54,56,57,58和59,一共是18个。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3356735.html
相关试题推荐
Thetwogirlslookexactly______inappearance.A、sameB、alikeC、likeD、sameone
Ican’ttellthe______differencebetweenthetwinsisters.A、slightB、simpleC、s
The______goalofthebookistohelpbridgethegapbetweenresearchandteachi
Concerningmoneyoranythingelse,conflictsbetweenhusbandandwifeusuall
Concerningmoneyoranythingelse,conflictsbetweenhusbandandwifeusuall
Somepeoplethinkoflifeasagame.Therearesimilaritiesbetweenlifeand
Somepeoplethinkoflifeasagame.Therearesimilaritiesbetweenlifeand
Somepeoplethinkoflifeasagame.Therearesimilaritiesbetweenlifeand
Somepeoplethinkoflifeasagame.Therearesimilaritiesbetweenlifeand
Somepeoplethinkoflifeasagame.Therearesimilaritiesbetweenlifeand
随机试题
TheConservativegovernmentwillfacedifficultyprovingthatitsplantoau
[originaltext]W:Yourresumeisperfect.NowIwanttoknowyouropinionabout
资料(一) 嘉特汽车股份有限公司总部位于中国内地,成立于1992年,由国
Cushing病最多见的垂体病变是A.微腺瘤 B.小腺瘤 C.大腺瘤 D.
某单层等高等跨厂房,排架结构如图1-3所示,安全等级为二级。厂房长度为66m,排
某钢筋混凝土框架梁截面尺寸b×h=300mm×500mm,混凝土强度等级为C25
下列物质中碱性最强的是: A.Sn(OH)4B.Pb(OH)2C.S
Theprogrambecomesunabletoserveits
患者男,76岁,左耳下肿物10年,近半年来肿物生长加快,出现疼痛及烧灼感。检查:
某工程项目的进度计划如下列双代号时标网络图所示,当工程进行到第4周末和第10周末
最新回复
(
0
)