最近版上蠻....小弟出個數學題...大家腦力激盪一下....請大家幫我解一解好嗎?順便解解悶嗎???????(我就是因為數學太差...所以沒考上台大的????)出題囉!!!有A君.B君.C君三人騎車到墾丁玩...當晚投身民宿...民宿老闆說..三人房每晚30元...所以三人各出10元...10X3=30元...住了一晚..隔日老板突然想到..三人同行可享有5元優惠...所以請服務生將5元退還給三人....怎知服務生按看2元....只將3元還給三人.......因此每人各拿到1元....到此為止敘述..都合理吧!!!問題來囉....A.B.C君每人出10元..退還1元..所以10-1=9元...9X3=27元....服務生污掉2元...所以27+2=29元...那.那.那.那.........那還有1元.....到哪裡去了呢???我知道其中一定有邏輯上的錯誤...但是有沒有哪位高手可以告訴我...為什麼呢???純屬學術討論...不可以筆戰哦....
老Jeff wrote:最近版上蠻....小...(恕刪) 小數點的差拉5元退還給三人....25 / 3 = 8.33 每人應繳2 / 3 = 0.66.......................每人被污3/ 3 = 1 ---------------------所以 8.33 + 0.66 +1 =10
henry999 wrote:5元退還給三人....25 / 3 = 8.33 每人應繳...(恕刪) 不太理解...事實上三個人拿出的是...9元啊....而不是8.33元..每個人被污掉0.66元也是確定啊....0.66X3=2元每人拿到9元 9X3=27元每人被污掉0.66元 0.66X3=2元合計還是29元啊...那還是少一元啊????不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..不解..-----------------------------------------------------------------------------附記..晚上要去氣功檢定...所以不去騎...請假一天...
Totoal hotel charge amount is NTD 30 each one cost is NTD10discount total NTD5 . so Hotel cost beocome 25(30-5)reback NTD.5 but waiter get undertablle com NTD2 discosunt become as NTD$3actual cost 25+NTD 2undertablle com NTD2 +NTD3 discunt = 30eachone actual cost is (25+3)/ 3=9.3339.333*3+ NTD 2undertablle com = NTD 30