# What is the length of the longest tape which can measure the dimensions of the room exactly?

## Chinese translation: 实际上是求最大公约数

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 15:30 Oct 20, 2006
English to Chinese translations [Non-PRO]
Mathematics & Statistics
 English term or phrase: What is the length of the longest tape which can measure the dimensions of the room exactly? The length, breadth and height of a room are 7.83 m, 5.13 m and 4.05 m respectively. What is the length of the longest tape which can measure the dimensions of the room exactly? 一道小学数学题，不理解最后一句话问的是什么东西，请教各位。 先谢！
 stonejohnChina Local time: 11:17
 Chinese translation:实际上是求最大公约数 Explanation:也就是求7.83、5.13和4.05的最大公约数 0.27。最长的带子应为27 cm。 7.83 m = 0.27m x 29 5.13 m = 0.27m x 19 4.05 m = 0.27m x15 --------------------------------------------------Note added at 1 hr (2006-10-20 17:02:53 GMT)--------------------------------------------------问：丈量该房间尺寸能正好量尽的最长带子是多长？ 答：27 cm。 注：长度为3 cm、9 cm的带子也可以正好量尽该房间的长、宽、高而无余数，但它们不是最长的。
Selected response from:

ysun
United States
Local time: 22:17
 非常感谢！4 KudoZ points were awarded for this answer

5 +3实际上是求最大公约数ysun
4 +1看解释
 Li Rui

Discussion entries: 2

56 mins   confidence: peer agreement (net): +1

Explanation:

 Li RuiChinaLocal time: 11:17Works in fieldNative speaker of: ChinesePRO pts in category: 4
 Asker: 谢谢，但是似乎不对哦，四个选项是：A. 80 cm B. 27 cm C. 134 cm D. 67 cm

agree  Wenjer Leuschel: 雖然我的問題是「為什麼不問最短的尺有多長」，不過我同意你的解讀。
 4 mins

1 hr   confidence: peer agreement (net): +3

Explanation:

7.83 m = 0.27m x 29
5.13 m = 0.27m x 19
4.05 m = 0.27m x15

--------------------------------------------------
Note added at 1 hr (2006-10-20 17:02:53 GMT)
--------------------------------------------------

 ysunUnited StatesLocal time: 22:17Native speaker of: ChinesePRO pts in category: 8
 非常感谢！

agree
 1 hr
-> Thanks!

agree
 3 hrs
-> Thanks!

agree
 2 days15 hrs
-> Thanks!

 Oct 20, 2006 - Changes made by Jianjun Zhang: Term asked 请教一道小学数学题 » What is the length of the longest tape which can measure the dimensions of the room exactly?

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