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標題: Form 1 Maths, get answer [打印本頁]

作者: kls12 時間: 13-10-25 10:42 標題: Form 1 Maths, get answer

In a game, May throws a coin 5 times. If the outcome is Head, she will get 3 points. If the outcome is Tailer, then she will get 2 points.

Q: Find May's maximum points if she got more heads than tails?

Tks

作者: PINKAVA 時間: 13-10-25 13:27

3＊5+0＊2=15

作者: kls12 時間: 13-10-25 14:04

PINKAVA 發表於 13-10-25 13:27
3＊5+0＊2=15

It may have different ans.

A) Tails able to 0, -> 3＊5+0＊2=15
B) Tails not able to 0, -> 3＊4+1＊2=14
C) "Tails" means at least 2 -> 3*3+2*2=13

Which one is correct?

作者: tommythumb 時間: 13-10-25 15:19

kls12 發表於 13-10-25 14:04
It may have different ans.

A) Tails able to 0, -> 3＊5+0＊2=15

題目係佢最高可以有幾多分，所以咪 A囉。

作者: kls12 時間: 13-10-25 16:25

tommythumb 發表於 13-10-25 15:19
題目係佢最高可以有幾多分，所以咪 A囉。

問題是"FIVE HEADS" 是否在"more heads than tails" 有效?

有些人話tail=0是無效的

作者: JustAParent 時間: 13-10-25 19:18 標題: 回覆：Form 1 Maths, get answer

問題係，究竟想教乜？咁都係中一數？

作者: kls12 時間: 13-10-25 21:22

本帖最後由 kls12 於 13-10-25 21:26 編輯

JustAParent 發表於 13-10-25 19:18
問題係，究竟想教乜？咁都係中一數？

是中一數學,但重點不同 ,太深定太淺?
大部分人的答案是A,但官方答案是B,有些人的解釋是不可0.
但既然是捉字失,用'S'應該至少有2吧,所以覺得是C更合適.

是嗎?

作者: JustAParent 時間: 13-10-25 23:44

kls12 發表於 13-10-25 21:22
是中一數學,但重點不同 ,太深定太淺?
大部分人的答案是A,但官方答案是B,有些人的解釋是不可0.
但既然是捉 ...

既然講得係數學科, 呢條題係中一課程邊個topic先, 我唔識classify, 所以我問究竟想教乜想考乜 ?

如果玩文字遊戲, 投降, 這是IQ題 ; 純數學考慮, 小三小四數一條, 答案當然是A, 中一太淺了吧.

作者: ELJCHL 時間: 13-10-25 23:45 標題: 引用：+本帖最後由+kls12+於+13-10-25+21:26+編輯

原帖由 kls12 於 13-10-25 發表
本帖最後由 kls12 於 13-10-25 21:26 編輯

The question is more head than tail that mean tail at least 1time, therefore head=4, so answer B is correct!

作者: ELJCHL 時間: 13-10-25 23:47 標題: 引用：+本帖最後由+kls12+於+13-10-25+21:26+編輯

原帖由 kls12 於 13-10-25 發表
本帖最後由 kls12 於 13-10-25 21:26 編輯

咁又有道理喎

作者: compsognathus 時間: 13-10-26 11:51

Zero is considered a number. For example, 1 is obviously greater than zero. If you have one pencil and your friend has none, then you have more pencils than your friend, right? With this reasoning, five is greater than zero. The original question never said anything about the number zero not being permitted, so the equation becomes (3*5)+(0*2)=15. If the number of tails must be at least one, it has not been clearly stated in the question.

作者: compsognathus 時間: 13-10-26 11:56

kls12 發表於 13-10-25 21:22
是中一數學,但重點不同 ,太深定太淺?
大部分人的答案是A,但官方答案是B,有些人的解釋是不可0.
但既然是捉 ...

In the English language, "s" as a suffix can also be used for quantities of zero.

作者: JustAParent 時間: 13-10-26 13:42 標題: 引用：Quote:tommythumb+發表於+13-10-25+15:19+

原帖由 kls12 於 13-10-25 發表
問題是"FIVE HEADS" 是否在"more heads than tails" 有效?

有些人話tail=0是無效的

No need to complicate the question. The meaning of "more than" is well defined in mathematical term, ie "greater than" or "addition". Your "official" answer is definitely wrong.

作者: Szebaba 時間: 13-10-28 00:07

of course 15 la, they are learning the concept of directed numbers now

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