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
2024-08-15
33
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/3720240.html
相关试题推荐
Livinginthewesternpartofthecountryhasitsproblems,______obtainingfres
Theconversationistakingplaceatafriend’shouse.[br][originaltext]M1Hi
Theconversationistakingplaceatafriend’shouse.[br][originaltext]M1Hi
Theconversationistakingplaceatafriend’shouse.[br][originaltext]M1Hi
Theconversationistakingplaceatafriend’shouse.[originaltext]M1Hi.Myn
Acensus-takercallsatahouse.Heasksthewomanlivingtheretheagesofher
Theconversationistakingplaceatafriend’shouse.[br][originaltext]M1Hi
Theconversationistakingplaceatafriend’shouse.[br][originaltext]M1Hi
Theconversationistakingplaceatafriend’shouse.[br][originaltext]M1Hi
Theconversationistakingplaceatafriend’shouse.[originaltext]M1Hi.Myn
随机试题
MynewhomewasalongwayfromthecentreofLondonbutitwasbecoming【C1】_
Whichofthefollowingprepositionalphrasescanfunctionasanadverbial?A、Desp
下列哪项是建立审计历史数据库的优点?Ⅰ.工作底稿的一部分可以从以前的文件中复制,
反向弯曲试验的弯曲直径比弯曲试验相应减少2个钢筋公称直径。
下列小儿不同年龄消化道出血的常见病症中,不正确的是A.新生儿期多见于新生儿出血症
男性,64岁,高血压病、糖尿病多年,渐出现双手双足麻木,发凉,查体:双手双足远端
假定A客户今年存入银行10000元,年利率为10%,按年复利计算,到期一次性还本
婴幼儿大便呈果酱色,伴阵发性哭闹,可能的疾病是A.痢疾 B.肠套叠 C.肠梗
下列哪项属于食物中毒A.伤寒 B.误食亚硝酸盐 C.暴饮暴食引起的急性胃肠炎
躯体疾病所致精神障碍的临床表现的共同特点,不正确的是 A.精神症状多有“昼轻
最新回复
(
0
)