拾贰 月 拾陆 号，裤裤未换

t3y_chenzhan

成绩一般，但裤裤未换，JJ比较全了

补一道数学当时没做出来的题，

一个出纳什么的人有255元，面额分别是5元和10元的，其中10元面额的张数比5元的多，问这个人最多可以有多少张纸币？
a 35
b 33
c 31（貌似）
d29（貌似）
e26
考场上没算出来

living8809

好消息  谢谢

living8809

不要用阿拉伯数字吧

odin0716

the answer is supposed to be B.33.

We can conclude by the below.
10X + 5 (X-1) = 255  (X represents the number of 10 dollars sheet)
Then make the solution of X 17.

We' re just able to make an approximate answer for that, so we need to introduce the answer into original equation.
Finally we can get 18 and 15, which are the numbers of 10 dollars and 5 dollars, respectively.

samt2w

33

bobzyc0304

the answer is supposed to be B.33.

We can conclude by the below.
10X + 5 (X-1) = 255  (X represents the number of 10 dollars sheet)
Then make the solution of X 17.

We' re just able to make an approximate answer for that, so we need to introduce the answer into original equation.
Finally we can get 18 and 15, which are the numbers of 10 dollars and 5 dollars, respectively.

-- by 会员 odin0716 (2010/12/16 14:44:02)

反例，10元16个 5元19个 10*16+19*5=255 16+19=35

evanwow

反例，10元16个 5元19个 10*16+19*5=255 16+19=35 ?

題目有說明 10元比5元多 您這樣5元比10元多了....非正確答案

lbccd

33

efsefs

16+13=29