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
2025-02-24
38
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://tihaiku.com/zcyy/3971297.html
相关试题推荐
ExactlywhenintheearlymoderneraNativeAmericansbeganexchanginganimalfu
ExactlywhenintheearlymoderneraNativeAmericansbeganexchanginganimalfu
Severalrecentstudieshaveshownalinkbetweenhealthandstairusage.Onerec
OnSaturdayoflastweek,MarketXwasopenfor15hoursandexactlyfourcashie
OnSaturdayoflastweek,MarketXwasopenfor15hoursandexactlyfourcashie
Exactlyfourfacesofarectangularsolidarepainted.ColumnA
Ifonenumberischosenatrandomfromthefirst1,000positiveintegers,whati
Oneintegerwillberandomlyselectedfromtheintegers11to60,inclusive.Wha
Ofthepositiveintegersthataremultiplesof30andarelessthanorequalto
Eachpersonatapartyshookhandsexactlyoncewitheachoftheotherpeopleat
随机试题
______everythingmeanstoknownothing.A、ToknowB、KnowingC、OneknowsD、Youkno
EarlyinJanuary2009,thetemperatureinTanana,Alaska,fellto55belowz
THERISEOFMOSCOW(1)Therise
ThesearefascinatingtimesforIICG(InternationalInvestmentConsultingGr
Mostpeopleinthemodernworld______(珍视自由与独立胜过其他一切).cherishfreedomandindepen
荒诞派戏剧的结构是( )。A.圆形的 B.方形的 C.直线型 D.三角形
A.全脾切除 B.脾部分切除 C.脾裂口修补缝合 D.脾门离断术 E.脾
下列哪些不是中药药动学研究内容()。A.生物膜对药物的转运B.药物在体内的分布
维持细胞内液渗透压的主要离子是A.Na B.Cl C.K D.HCO E
2、【文件二】 类别:电话录音 来电人:柳芳第二事业部人力资源经理 接收
最新回复
(
0
)