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
21
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
WaterSupplyinVeniceP1:ThecityofVenicestretchesacrossagroupof117sm
下列结论中正确的是( )。A.若y=f(x)在x0点连续,则f′(x0)存在
重要工程的预应力管桩应对电焊接头做()%的焊缝探伤检查。A.5 B.10
固定义齿修复中,缺失,正确的设计是A.作基牙 B.作基牙 C.作基牙 D.
下列谱例中的同声二部合唱属于哪一种民歌?() A.侗族大歌 B.蒙古族短
选择最适用的技术设计方案的方法是()A.先考虑整体而后局部,根据作业
目前制备阿司匹林栓的基质为下列A.半合成棕榈油酯 B.半合成脂肪酸酯 C.半
根据公司发展需要,某期货公司拟聘请独立董事,下列人员中,不得担任该期货公司独立董
防水砂浆施工时,其环境温度最低限制为()。A.0℃ B.5℃ C.10℃
暂列金额是指发包人在工程量清单或预算书中暂定并包括在()中的一笔款项。A.合同
最新回复
(
0
)