little tina 發問時間: 社會與文化語言 · 1 0 年前

gmat-資充問題

Q1: Rasheed bought two kinds of candy bars, chocolate and toffee,

that came in packages of 2 bars each. He handed out 2/3 of the chocolate bars and 3/5 of the toffee bars. How many packages of chocolate bars did Rasheed buy ?

條件1: Rasheed bought 1 fewer package of chocolate bars than toffee bars.

條件2: Rasheed handed out the same number of each kind of candy bar.

答案是:兩個條件加起來才能成立。

我這句話也問題耶:chocolate and toffee, that came in packages of 2 bars each.

是一包裡面有coffee 兩條,還是一包裡面 1條coffee 跟 1條 tofee?

請詳細解說謝謝。

1 個解答

評分
  • JAMES
    Lv 6
    1 0 年前
    最佳解答

    Q1: Rasheed bought two kinds of candy bars, chocolate and toffee,

    that came in packages of 2 bars each. He handed out 2/3 of the chocolate bars and 3/5 of the toffee bars. How many packages of chocolate bars did Rasheed buy ?

    拉西買兩種糖果 巧克力和太妃糖 兩種糖都是兩支一包裝 他交出2/3的巧克力和3/5的太妃糖 請問拉希各買了幾包巧克力和太妃糖

    條件1: Rasheed bought 1 fewer package of chocolate bars than toffee bars.

    拉西買的巧克力比太妃糖少一包

    條件2: Rasheed handed out the same number of each kind of candy bar.

    拉西交出的兩種糖果數量一樣

    答案是:兩個條件加起來才能成立。

    我這句話也問題耶:chocolate and toffee, that came in packages of 2 bars each.

    是一包裡面有coffee 兩條,還是一包裡面 1條coffee 跟 1條 tofee?

    每種都是一包裝2支

    答案:

    假設太妃糖買了 X包 則巧克力是買了 X-1包

    巧克力交出2/3 就是 (X-1)2/3

    太妃糖交出3/5 就是 3/5 X

    所以 2/3(X-1) = 3/5X

    計算式 2X/3 - 2/3 = 3X/5

    2X/3 - 3X/5 = 2/3

    10X/15 - 9X/15 = 2/3

    X/15 = 2/3

    3X = 30

    X = 10 ---> 太妃糖的包數

    X-1=9 ---> 巧克力的包數

    驗算: 9*2=18 * 2/3 = 12支 巧克力交出的數量

    10*2=20 *3/5 = 12支 太妃糖交出的數量

    符合條件設定!

    2009-01-03 04:50:00 補充:

    有不懂的地方要問喔 15是3和5的最大公約數 -2/3移到右邊後負的變正的

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