首页
登录
职称英语
A census-taker calls at a house. He asks the woman living there the ages of her
A census-taker calls at a house. He asks the woman living there the ages of her
游客
2023-10-17
40
管理
问题
A census-taker calls at a house. He asks the woman living there the ages of her three daughters. The woman says, "If you multiply their ages the total is 72; if you add their ages the total is the same as the number on my front door, which you can see. "
The census-taker says, "That is not enough information for me to calculate their ages. “The woman says, "Well, my eldest daughter has a cat with a wooden leg. “The census-taker replies, "Ah! Now I can calculate their ages. “What are the ages of the three girls?
选项
答案
8,3,3
解析
(由于三个孩子年龄相乘得72,可以得出的组合有:72×1×1,36×2×1,18×4×1。9×4×2,9×8×1,6 x 6×2,8×3×3, 12×6×1, 12×3×2, 18×2×2,6×4 x 3.24×3×1。各组合相加之后得到:74,39,23,15,18,14,14,19,17,22,13,28。人口普查员一定知道门牌号码,可是仍然无法确定是哪个组合,说明门牌号码是14,可知是6×6×2,8×3×3这两种情况中的一种,房主人又提到eldest daughter,说明,较大的两个孩子不可能同岁,故可以确定三个孩子的年龄分别是8岁,3岁,3岁。)
转载请注明原文地址:https://tihaiku.com/zcyy/3105641.html
相关试题推荐
SomechildrenlivinginEuropedon’thaveany______tolearnaforeignlanguage.
Hemingway’sfirstnoveltellsofthesadnessand______ofyoungAmericansliving
LivingwithBillwasfun.Wesoonfoundoutthatwehadalot______andquicklyb
Shewasvery______becauseshemadea______of£10,000onthesaleofherhouse.
Livinginaforeigncountryisfun,butitisn’talwayseasy.Therearemany
WriteacompositionentitledShouldaCollegeGraduateRentorPurchaseaHouse.
EBaywasfoundedinPierreOmidyar’sSanJoselivingroominSeptember
EBaywasfoundedinPierreOmidyar’sSanJoselivingroominSeptember
Livinginaforeigncountryisfun,butitisn’talwayseasy.Therearem
Livinginaforeigncountryisfun,butitisn’talwayseasy.Therearem
随机试题
Inearly-twentieth-centuryEngland,itwasfashionabletoclaimthatonlya
Agoodteacherknowshowtogiveyou(confident)______.confidence一名好老师知道如何给你自信。
[originaltext]Thesefriendsaretalkingaboutafilm.Whowillgotoseeit
Ifthisuniversity______suchagoodreputation,Iwouldnothavecomehere.A、did
给水引入管与排水排出管的水平净距不得小于()m。A.1 B.1.5 C.2
一般性货币政策工具
双黄连栓的基质为半合成脂肪酸酯,一般选用的润滑剂是A.液状石蜡B.麻油、90%乙
共用题干 患者男性,20岁。因上腹隐痛2天入院。患者自诉上腹疼痛,饥饿时加重,
()可以在证券交易所债券市场上参加记账式国债的招标发行及竞争性定价过程,向财政部
在核准制下,证券发行监管要以()为中心,增强信息披露的准确性和完整性。A:中介机
最新回复
(
0
)