難math 15點

👨🏻‍🏫 學術台數學

COCO

2009-12-21 3:25 am

圖片參考：http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02media/q4%20)%2001amc8.jpg

圖片參考：http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02media/q15%20)%2001amc8.jpg

圖片參考：http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02media/q17%20)%2001amc8.jpg

圖片參考：http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02media/q18%20)%2001amc8.jpg

圖片參考：http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02media/q22%20)%2001amc8.jpg

圖片參考：http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02media/q25%20)%2001amc8.jpg

ANSWERS: 4. ( E ), 15. ( A ), 17. ( B ), 18. ( D ), 22. ( E ), 25. ( D )

我有答案不過唔知點解請解釋,plz!

更新1:

sorry, d圖睇唔到某d字請去 http://www.unl.edu/amc/b-registration/b1-archive/2002-2003/02bro8/02%208%20bro%20html/02bro8-que.html 睇

回答 (1)

myisland8132

2009-12-21 3:39 am

✔ 最佳答案

4 The required number is 12394. So the digit of ten place is 9

15 After4 minutes, Homer eats 12 potatoes. the remaining potatoes is equal to 44-12=32. So, the potatoes which Christian peeled is 32*5/8=20

17 3/2=1.5 which is the smallest ratio among all possible choices.

18 the possible combinations are (1,5) (2,5) (3,5) (4,5) (5,5) (6,5) (5,1) (5,2) (5,3) (5,4) (5,6) => probability =11/36

22 the mark 97 should not be appeared since 19*5=95 and you cannot get 2 marks in 1 questions.

25 7425/3=2475 =>D

👍 0 👎 0

收錄日期: 2021-04-26 13:59:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091220000051KK01172

檢視 Wayback Machine 備份