推理大挑戰(第四關)

playbr2

相信e條題目都有吾少人玩過,所以今次一於改難些少.....由12粒波子变成13 粒波子......不過對於識玩既朋友,應該都屬大同小異既啫5 p3 C2 ?( c, v! B, |. R

9 H' H5 ^- @) _1 u( b! |; s『有 13 粒波子，有 12粒是重量相同的，有 1 粒是重量不同的 (沒有列明是輕了 / 重了)。/ K7 V  K8 X3 J, e! y4 K
現准許使用 3 次天秤。請解釋怎樣才能找出 13 粒內那 1 粒重量不相等 (即是重了 / 輕了) 的波子呢？』
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注意:
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1. 回答題目時,波子的名稱代號請用使用 1,2,3,.......至13 等數目代表, 即1 代表1號波子 , 13 代表13號波子.....以方便查證7 W5 }4 j. m1 R$ ]3 t; ^0 i

2 W& l6 h- ~% c, H# a! J2 S2. 請回答題目的朋友使用'' 反白功能 '' (即係將D字既颜色改為白色,白色颜色在黑色颜色上一行,透明的呢)穩藏回答答案,費事比其他人抄  , hide 字要連埋 , 內容 = 答案6 P# N8 F" {- `3 N

3 M$ T8 J) x9 @[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:  Z( C: x0 `) Y8 r) }: g
相信e條題目都有吾少人玩...

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我以前畫左個chart去答,* J' q; O! O5 ?  X3 Y' i
等我搵下仲在吾在
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& Y. v1 ~5 w  }2 E  Y7 E8 z當日用左37分鐘答１２粒波子，差７分鐘才合格。
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/ D) A2 Q. r6 o. e" S9 F[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:8 D7 _  u9 q. S$ {

1 P3 b1 G) o/ E) U$ N. k8 C我以前畫左個chart去答,* P: V4 M0 l& t
等我搵下...

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記得穩藏答案

16749

唔識隱藏...已經諗到..

playbr2

Originally posted by 16749 at 2007-3-1 11:35 PM:2 Y( _1 z! o3 H, \- t( V8 j3 j9 ~
唔識隱藏...已經諗到..

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sor !!!....e加改左
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2. 請回答題目的朋友使用'' 反白功能 '' (即係將D字既颜色改為白色,白色颜色在黑色颜色上一行,透明的呢)穩藏回答答案,費事比其他人抄
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:3 r$ Z: W& {; ^5 R
相信e條題目都有吾少人玩...

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- L" w7 g* y! H: c' {/ m" G) L- D5 ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.- K! x: \  T2 D2 H# o; o6 U4 M+ p" X

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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# ]) U5 ~* I2 C0 b* EPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
6 T- o/ m  B; C3 Xif 1-6 = 7-12     13 is fake4 N: ]& Q9 g) }8 y& l

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Weight the 2 time 9 z$ P8 c' W/ r

6 E1 w6 X9 O8 O7 A; ]" Y' B& r$ NSuppose 1-6> 7-12
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  b& i8 [% t3 R7 W1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-37 e" }3 ^. e7 r: H8 d
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Just like the first Step
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4 vs 5
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/ X3 e% A( W& h. eif 4=5 6 is the fake one
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if 4>5  4 is the fake one . x# a# B- U1 ?5 A

) a7 J( D3 c4 o2 ]+ b5 land so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
& ?3 u0 o8 M6 BGroup B: 5,6,7,8. D9 O, Z+ S& S9 I% }
Group C: 9,10,11,12! m# I4 S) l* _* k
Group D: 13% A+ I2 ?5 ~% M2 A; c1 z" c! ~

- }6 s$ _+ P6 ARound 15 T- R5 L" |0 T# i" @; I* _
Group A vs Group B, J, T/ x& d( M0 c: i
如A and B一樣, 即較輕一粒在Group C or D
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Round 2* a* ?# O) z6 E3 e- x
再在Group C拆成:& W" w' E) p8 T4 e3 F  ~: {
Group Ca: 9,10, q* f, I: Q. `9 u' ]7 G+ w: B
Group Cb: 11,12
8 R8 C8 b1 @( J" n然後再秤, 如一樣, 即13為較輕一粒.- L/ r. J% U, L3 U  e* y

4 ~6 r' a1 h, H5 ~如不同, 即較輕一組有一粒較輕波子在其中,
' k6 m# d: I! ~要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒* H+ J/ h0 h% R$ g, K8 y3 c- ^
Round 1) G& u( |7 h1 b1 v' C5 P# v
1,2,3,4 vs 5,6,7,8 = equal* {! f0 T, J1 A% x2 w6 B
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Round 2
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Round 3
# B1 b# s* h! [, Q/ ~9 vs 10 = 9 > 10! h) G. e- a6 b/ j. x
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The answer is 10.9 }" T* D2 L4 s# {% `
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e.g. #2 假設7為較輕的一粒9 T% e) E9 y# L* O  o
Round 19 o* e0 v$ b8 }. z& e- c
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,89 x4 K( B1 ~5 I6 J5 z

- ^2 J  x" x! j# {Round 2
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Round 3
$ F6 w3 m8 o. O$ @4 M& Q7 vs 8 = 7 < 8
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% T. a2 W- H  K$ }9 k7 j; GThe answer is 7.
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e.g. #3 假設13為較輕的一粒
0 ?* k$ [+ X* ~7 e4 T9 h$ K0 R8 tRound 16 b4 X$ w& V6 r; u
1,2,3,4 vs 5,6,7,8 = equal
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6 w  B) _0 @0 k6 b3 V, S( zRound 2
# Z$ y0 J- q" a9,10 vs 11,12 = equal2 u# u: H- b0 `8 H- w
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No Round 3: t. J' V/ D8 G% P: x0 N  n3 H

8 b; l4 H; j0 o2 B+ @9 ^9 aThe answer is 13.
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唔知我答得正唔正確呢?! ! Q8 b5 Q; J" ]
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[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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8 m$ E1 `8 Y$ B8 W4 t1-6 vs 7-12
8 P& G2 D) ~$ }( H7 Y6 T8 oif 1-6 = 7-12     13 is fake
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% K  S' ^: T6 B- PWeight the 2 time ; S! `: i& _+ \! v$ B1 V% K# c! W
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Suppose 1-6> 7-12
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+ x$ E; |7 a8 g% o; J1-3 vs 4-6
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Then Weight the Third
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% p) ^' `" y$ O$ y5 ?- @; V' YSuppose 4-6 > 1-3
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Just like the first Step$ j6 P/ z$ F7 D
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4 vs 5 4 l% G4 ]- s: U2 x
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
2 N# E/ ~  j  W) Eand so on......................

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問題第二步
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  H# K7 Q. s% f% X$ tWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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( h% y. l7 W, O8 ~+ [: {你第三步点去搵 7-12 边一粒???
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========================================
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( }) D+ Q# V. k9 ~; _問題第三步
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/ s, f- U) |: m7 \Weight 1:  1-6> 7-12* b" p& D1 {1 [
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Weight 2:  4-6 > 1-3 5 P0 {1 G: }  j8 a: s8 h' N
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你又吾知粒波子輕D定重D ..... 咁点解第三步只磅4-6 吾磅1-3 . 如果個波子係輕D ,咁4-6 就一定一樣咁重