求ＰＲＥＰ应用题一道

门萨来了

55.  4687-!-item-!-187;#058&004202

Malik's recipe for 4 servings of a certain dish requires 1
                     cups of pasta.  According to this recipe, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

 

(1)  The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish.

 

(2)  Malik used 6 cups of pasta the last time he prepared this dish.

--------------------------------------------------------------------------------------------------------------------------------------------------------

【答案】C

【思路】4 serving/cup, how many cup next time?

(1)
        how many serving last time?  -------------------------------------------------insufficient

(2) 6
                    4=24 serving last time------------------------------------------------------ insufficient

(1)(2) this time serving=24  
                    =12
                     
                    =3cup------------------------------ sufficient

请问什么叫servings啊，我理解的１里的下次跟这次一样就是４servings需要１cup of pasta,但是显然理解错了

下边的解释没太明白，有高手能指点下吗？

hiphoper

以下是引用门萨来了在2009-1-12 19:13:00的发言：

55.  4687-!-item-!-187;#058&004202

Malik's recipe for 4 servings of a certain dish requires 1
      cups of pasta.  According to this recipe, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

(1)  The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish.

(2)  Malik used 6 cups of pasta the last time he prepared this dish.

--------------------------------------------------------------------------------------------------------------------------------------------------------

【答案】C

【思路】4 serving/cup, how many cup next time?

(1)
  how many serving last time?  -------------------------------------------------insufficient

(2) 6
     4=24 serving last time------------------------------------------------------ insufficient

(1)(2) this time serving=24  
     =12
      
     =3cup------------------------------ sufficient

请问什么叫servings啊，我理解的１里的下次跟这次一样就是４servings需要１cup of pasta,但是显然理解错了

下边的解释没太明白，有高手能指点下吗？

serving當作份數吧，給你比例"4 servings of a certain dish requires 1 cups of pasta"問你下次準備幾杯麵，1)準備上次的一半份數 2)上次用幾杯麵，2)套回題給的比例，乘一半即得出。

樓主妳好厲害，你可的分數就是我目標，我已經考次了四次了，你的V跟我的一樣，不過我的Q上次只有41....希望這次數學可以考高..有沒有甚麼建議可以指教??

门萨来了

这位兄弟，我２２号才考．．．．．．．囧．．．．．．

daddybear

这道题第一句根本不用去看，也不用理解。

用不着算6×4，就是个直接问条件的题