[Hsiu]

>>>>>>>以為加減很簡單嗎？...
>
>
> 三個人去投宿
>
> 服務生說要300元
>
> 每個人就各出了100元，湊成300元
>
> 後來老闆說今天特價只要250元
>
> 於是叫服務生把退的50元拿去還給他們
>
> 服務生想說自己暗藏20元起來，於是就把剩下的30元還給他們
>
> 那三個人每人拿回１0元100－10＝90　表示每個人只出了90元投宿
>
> 90X3+服務生的20元＝290　那剩下的10元呢？？？？
>
> 紐西蘭提供這個題目後，受到廣大的迴響！
>
> 真的很玄喔.......



>>>> 沒有答案!

[CK]

這問題問得太奇怪了吧


加到 290 根本就錯


老闆說要打折 => 250 + 50 = 3 * 100 = 300
服務生抽 20 => 250 + 20 + 30 = 3 * 100 = 300
服務生退 10 => 250 + 20 = 3 * 100 - 30 = 3 * 90


3 * 90 = 250 + 20 代表 3 位旅客各付 $90 給旅館和服務生, 然後服務生拿了 $20, 旅館拿了 250.


如果 3 * 90 + 20 代表什麼? 3 位旅客總共付了 290? 還是服務生幫忙付 $20 給旅館然後自己那 20 不要了?


這題目根本就算錯! 那有什麼多出 $10. 只是要考我們邏輯而已!

[Nemo]

how about let's say..
250+20=270
270/3=90
90+10=100

20 加上住宿費 250=$270
so everybody pays $90 and they will still have $10 left in their pocket which makes up to $30 in total.

九十元是已經加上服務生拿走的錢了,所以她不能再加二十, 而是因該加上他們拿回來的$30. 所以最後那兩段是錯誤的計算~~~^^
there~~~nothing is lost in here~~~^^

[無限]

dogs = 旺旺
cats = 喵喵
sheep = 咩咩

[無花果]

they didn't lose anything ya...
everybody paid 90*3 = 270
the night actual cost = 250, waiter took 20, so 250+20=270
just the way the question sounded is creepy bah...

[晴天]

>>>>>>>以為加減很簡單嗎？...
>
>
> 三個人去投宿
>
> 服務生說要300元
>
> 每個人就各出了100元，湊成300元
>
> 後來老闆說今天特價只要250元
>
> 於是叫服務生把退的50元拿去還給他們
>
> 服務生想說自己暗藏20元起來，於是就把剩下的30元還給他們
>
> 那三個人每人拿回１0元100－10＝90　表示每個人只出了90元投宿
>
> 90X3+服務生的20元＝290　那剩下的10元呢？？？？
>
> 紐西蘭提供這個題目後，受到廣大的迴響！
>
> 真的很玄喔.......



>>>> 沒有答案!

all three pays 300..
but the boss only takes $250

so three of them paid $250
$250/3 = $ 83.3 repeating (what each of them paid)

waiter took $20
and the three ppl got $30 back (so $10 each)

so
each paid $83.3 repeating + $10 = $93.3 repeating

$93.3 repeating x 3 people + $20 that the waiter took = $300


the logic in the ques was just misleading..

[Nemo]

all three pays 300..
but the boss only takes $250

so three of them paid $250
$250/3 = $ 83.3 repeating (what each of them paid)

waiter took $20
and the three ppl got $30 back (so $10 each)

so
each paid $83.3 repeating + $10 = $93.3 repeating

$93.3 repeating x 3 people + $20 that the waiter took = $300


the logic in the ques was just misleading..

lol....then ur answer should be...
299.999999 repeating. and it is approximate to 300

u can elimite the decimal by adding 250 and 20. so the total spending will be 270. 270 + the change of 30 then it will be 300 exactly~~~lol

[晴天]

lol....then ur answer should be...
299.999999 repeating. and it is approximate to 300

u can elimite the decimal by adding 250 and 20. so the total spending will be 270. 270 + the change of 30 then it will be 300 exactly~~~lol

250/3 = 83.3 repeating
83.3 repeating + 10 = 93.3 repeating

93.3 repeating*3 = 280

and 280+20=300

so.. i dont' know what you are talking about :spin:

[Nemo]

250/3 = 83.3 repeating
83.3 repeating + 10 = 93.3 repeating

93.3 repeating*3 = 280

and 280+20=300

so.. i dont' know what you are talking about :spin:

lol~~~
u do know that in a more formal math u should try to express answers as a whole number right? teachers also do that to elminates calculator users that doesnt know how to work with equation and function.

well, ur answer is correct, but it can be expressed in a better form that is wut im saying.....^^

[af034995]

all three pays 300..
but the boss only takes $250
so three of them paid $250
$250/3 = $ 83.3 repeating (what each of them paid)
waiter took $20
and the three ppl got $30 back (so $10 each)
so
each paid $83.3 repeating + $10 = $93.3 repeating
$93.3 repeating x 3 people + $20 that the waiter took = $300
the logic in the ques was just misleading..

This one is exactly the right question !!!