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作者: Hsiu |
>>>>>>>以為加減很簡單嗎？...
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> 三個人去投宿
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> 服務生說要300元
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> 每個人就各出了100元，湊成300元
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> 後來老闆說今天特價只要250元
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> 於是叫服務生把退的50元拿去還給他們
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> 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
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> 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
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> 90X3+服務生的20元＝290 那剩下的10元呢？？？？
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> 紐西蘭提供這個題目後，受到廣大的迴響！
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> 真的很玄喔.......
>>>> 沒有答案!
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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..