首页
登录
职称英语
What is the total number of integers between 100 and 200 that are divisible by 3
What is the total number of integers between 100 and 200 that are divisible by 3
游客
2025-02-23
54
管理
问题
What is the total number of integers between 100 and 200 that are divisible by 3?
选项
A、33
B、32
C、31
D、30
E、29
答案
A
解析
对于区间[a,b]中有多少个数能够被数n整除,计算方法如下:
第一步:把b往小里凑。找到最近的n的倍数,记为r;
比如例题中6为200,那么往小里凑,找到最近的3的倍数为198。
第二步:把a往大里凑,找到最近的n的倍数。记为s;
比如例题中a为100,那么往大里凑,找到最近的3的倍数为102。
第三步:区间[a,b]中有能够被数n整除的个数即为(r-s)/n+1。
比如例题中能够被3整除的个数为:(198-102)/3+1=33。
正确答案为A。
转载请注明原文地址:http://tihaiku.com/zcyy/3969525.html
相关试题推荐
Bobhas40coinsconsistingonlyofdimesandquarters.Ifthenumberofdimesi
Howmany"+"addedtotheninenumbersbelowcanmaketheresult99?(Adjacentn
Whatisthetotalnumberofintegersbetween100and200thataredivisibleby3
Theproductofapositiveintegeraand1080isasquarenumber.Whatisthelea
QuantityA:pandqaretwoconsecutivepositiveintegersTheremainderwhenthe
QuantityA:thestandarddeviationoftheoddnumbersbetween1and19inclusive
QuantityA:kisanintegerbetween1and100,inclusivewhatisprobabilitytha
Whatisthetotalnumberofintegersbetween100and300thataredivisibleby
Ifaandbareintegersanda-b=8,then(a+b)CANNOTbeA、0B、lessthan6C、greate
Onaroadthereisatreeevery46meters.Ifthetreesarenumberedconsecutive
随机试题
Thepossibilitiesofanautumnelectioncannotbe______.A、struckoutB、leftout
[A]school[B]numbers[C]emphasize[D]continue[E]significant[F]undoubtedly[
[img]2022m9s/ct_ve01003002m_ehbreadf_0130_220913[/img]Notes:update更新automate
[originaltext]M:Hey,Linda!Longtimenosee!Iheardthatyou’regoingonab
ShoppinghabitsintheUnitedStateshavechangedgreatlyinthelastquarte
That______thecase,wehavetomakesomechangesinourplan.A、isB、wasC、bein
投资估算指标是确定和控制建设项目全过程各项投资支出的技术经济指标,其范围不涉及(
工程网络计划执行过程中,如果某项工作实际进度拖延的时间超过其自由时差,则该工作(
各科病死率为?A.病死数合计/患者合计×100/100 B.各科病死数/各科患
(2020年真题)根据证券法律制度的规定,下列关于发行人首次公开发行股票应具备
最新回复
(
0
)