作者Alroy (宁静致远)
站内GRE_Verbal
标题Re: [计量] In a certain apartment building ...
时间Thu Oct 23 17:54:57 2008
※ 引述《shugh (我)》之铭言:
: BB P246 Q26
: In a certain apartment building exactly 1/3 of the apartment have two bedrooms
: and exactly 1/7 of the two-bedroom apartments are front apartments. Which of
: the following could be the total number of apartments in the building?
: ans.42
: 我想我不太懂题目的意思,连算都不知该从何算起,
: 烦请大家帮我解释一下...
: 谢谢
某公寓大楼正好有1/3是两房的,在这些两房公寓中正好有1/7是正面的
问这栋大楼的公寓总数是多少?
假设总共是x间,则正面的就是1/3 * 1/7 * x = x/21
公寓数不可能有分数或小数,所以x/21必为整数,x要为21的倍数 = 21,42,63.....
这题有选项吧..
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 221.169.198.150
1F:推 shugh:恩 是有选项的 原来是要找21的倍数啊 118.161.52.83 10/23 19:03
2F:→ shugh:可以再问一下GRE计量题目中的SAIL是直角还是 118.161.52.83 10/23 20:02
3F:→ shugh:等腰三角形啊? 118.161.52.83 10/23 20:02