[問題] 補充講義一題

由 **myron** » 2005-05-12 21:12

Each of the following numbers has two digits blotted out. Which of the numbers could be the number of hours in x days, where x is an interger?

(A)25●,●06
(B)50●,●26
(C)56●,●02
(D)62●,●50
(E)65●,●20

答案:(E)
請問這題該如何解,謝謝. ^o)

由 JS » 2005-05-12 21:27

Question ask which following number is a mutiple of 24

so multiples of 24 are....

24, 48, 72, 96, 20,.....

and the answer goes to EEEEEEEEEE <:o)

congratulations.....

由 **myron** » 2005-05-12 22:40

JS \$m[1]:Question ask which following number is a mutiple of 24

so multiples of 24 are....

24, 48, 72, 96, 20,.....

and the answer goes to EEEEEEEEEE

congratulations.....

原來這麼簡單,謝謝啦. :smile

由 **SugarChunda** » 2005-05-30 16:40

請問一下, 題義是否可簡化為: 以下數字中, 哪一個是24的倍數 ?
若是我的理解與上述相符, 那要如何得知哪一個被去掉2位數的6位數字是24的倍數 ?
因為我判斷到本題要找24的倍數之後就停住了, 沒辦法再處理下去....
謝謝高手指點 !

由 **汪汪北鼻** » 2005-05-30 16:58

Each of the following numbers has two digits blotted out. Which of the numbers could be the number of hours in x days, where x is an interger?

題目只說could be

(E)65●,●20
尾數是20--could be the multiple of 24 :smile

其餘的ABCD都不合 :smile

由 **gogotu** » 2005-05-31 10:57

SugarChunda問

請問一下, 題義是否可簡化為: 以下數字中, 哪一個是24的倍數 ?

我認為是可以的，因為24=6*4所以，可以用4來判斷比較方便。
在五個答案中，剛好只有E的末兩位數可以被4除，所以，可以確定排除其他四個選項，選E

[問題] 補充講義一題

[問題] 補充講義一題

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