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miss
初青會員
Posts 162 |
 Posted - 05.05.2004 : 20:09:44
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[updated:LAST EDITED ON May-05-04 AT 08:10 PM (GMT)] :18> :18> :18>
以下是知商學會 MENSA 的其中一條題目，對於我這種數學白癡來說實在太懊惱，甚至知道答案，都證唔出條數 :70> ，然後有數學高手證了出來，我都係唔明 :83> ，各路高人  有時間請教教小妹  :1> ：
Bill is now twice as old as Ben was when Bill was as old as Ben is now. Bill and Ben have a combined age of 91 years. How old are Bill and Ben ?
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FairMan
初青會員
Posts 402 |
Posted - 05.05.2004 : 20:18:36
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I saw that question in the column of 李敏. But I don't even get what it means. |
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billson
管理員
Hong Kong
Posts 3488 |
Posted - 05.05.2004 : 20:30:07
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JC
少校級會員
Posts 713 |
Posted - 05.05.2004 : 20:31:01
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[updated:LAST EDITED ON May-05-04 AT 08:32 PM (GMT)]計錯..唔識 |
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Dickson
隊長級會員
Hong Kong
Posts 10479 |
Posted - 05.05.2004 : 20:35:06
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hahaha.....你緊係識啦！Bill Bill. |
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miss
初青會員
Posts 162 |
Posted - 05.05.2004 : 21:03:38
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唔該晒 bill bill！果然係 bill 呀0下，計到自己幾多歲！
句英文我識解，但真係 stupid 唔識計！嘻嘻~~~
釘橋釘橋 |
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Dream Girl
少校級會員
Posts 527 |
Posted - 05.05.2004 : 23:28:50
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嘩!
睇完條式覺得真係好難......
我呢d小朋友更冇可能識計! |
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JAL Captain
初青會員
Canada
Posts 155 |
Posted - 06.05.2004 : 00:00:48
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Miss, do you have other questions like this ah? Very interesting. :) |
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miss
初青會員
Posts 162 |
Posted - 06.05.2004 : 00:54:21
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我都係睇報紙見到李敏個專欄先開始諗咋!
跟住咪去堆個 MENSA.COM 睇囉! 果度都有 free test 0既, 不過我個人都係太唔掂....所以成績都係唔好提啦!
至於呢一題,我朋友比我0既答案真係睇唔明, 好彩 bill bill 比0左個容易明 D 0既 solution 我!
呢個係我朋友比我0既答案:
2x + x = 91--1/2 (x)
3x = 91--1/2x
(2)3x=2(91)--(2)1/2x
6x=182--x
7x=26
2x=52
x+52=91 |
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streamline
初青會員
Posts 210 |
Posted - 06.05.2004 : 01:05:16
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[updated:LAST EDITED ON May-06-04 AT 01:07 AM (GMT)]大開眼界......
 101 marks, haha...我就會用表黎睇,more clear~
billson, 如果今年又有interview玩, 出條咁o既野, 我會開心死呀~~
我無教過奧數,我覺得如果係中文,小學生應該會識計,而家學生太天才喇,好多都學緊類似的問題!!
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dayo
初哥級
Posts 16 |
Posted - 10.05.2004 : 12:02:39
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Bill's age be x, Ben's age be y
Let difference be d, so that...
x-y = d (1)
x+y = 91 ---(2)
in the past,
Bill = 2 Ben
91-y = 2(91-x-d) ---(3)
3 eqt. 3 unknown... what is the problem? |
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kml4379
少校級會員
Hong Kong
Posts 957 |
Posted - 11.05.2004 : 02:03:47
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我就覺得而家o的小學生被人迫得太緊啦........
做數做到一o的滿足感都冇........
我細個時邊度有奧數學呀......
而家就成日聽到有o的咁o既班啦
如果呢條題目俾小學生做
受過訓練o既學生.........就同做四則冇分別
一o的感覺都冇
冇受過訓練o既學生........就只能夠慢慢諗, 慢慢試
做到之後會有滿足感
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智力數學題﹝智商學會題目﹞
