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) K) N1 s/ h& U' ?/ L

; g2 Y( h  B9 K( W! F* t『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)。
: S1 k6 ]& k$ ~* L1 O5 j$ B3 p2 X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？』8 m7 V  C1 Z! K* F- r' J
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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
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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  , hide 字要連埋 , 內容 = 答案
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' N: W, ^/ T( j0 d; o  z; [2 T. u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,
, d/ L0 }8 b2 L0 n. R等我搵下仲在吾在: C8 ~" Y  R9 c/ y6 o6 P' w- H
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當日用左37分鐘答１２粒波子，差７分鐘才合格。5 G$ t& x! g! J0 o* [
13.........: @+ G) R0 O5 i! G# H
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% r( S) G& n8 o" V* D

0 P  I) d$ C0 U% \' b$ B2 g/ l, ~我以前畫左個chart去答,
$ g7 y; ^) i& a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:- f0 Q. L2 B9 A) Y' [
唔識隱藏...已經諗到..

3 j1 j" x# Y1 w$ o, O* x% \6 H2 m& l$ `: P' C8 Y  Y
sor !!!....e加改左5 o0 L  e# h1 a/ v0 s# ?
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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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+ ^- c0 `6 X8 _1 ?0 a! q[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
* a1 U2 I) K7 H相信e條題目都有吾少人玩...

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, K$ @- u& d) N. P! UPlayPlay, Let me know later who has the right answer and I will add points accordingly.& b/ i. E. B7 Y6 T! M3 q2 o1 F

4 j: Q6 m* O' |  H( }; C- rThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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5 Z7 z. g# P6 G+ F8 Y# FPlayPlay, 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

1.
* Q' u- V9 z5 D' j1 K: _) t1-6 vs 7-12! u8 |8 j& e7 f# ]) X
if 1-6 = 7-12     13 is fake7 Q" h; s9 d1 C7 s! Y+ L8 V2 R
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Weight the 2 time 1 P, S( _8 x9 ?0 A# }

& Y1 _. A, `. z. {3 v- f/ ?/ H) LSuppose 1-6> 7-12* |/ P) e3 x& R9 a# M
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1-3 vs 4-6 1 I& J6 N, a- {2 |
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Then Weight the Third
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! r6 ]) L; D2 GSuppose 4-6 > 1-39 k# ^  [1 e0 m3 S8 T! [& L
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Just like the first Step
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5 S) I2 d. r( B5 |. B* g4 vs 5
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/ L/ p" v8 |! X1 U5 H  Vif 4=5 6 is the fake one
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if 4>5  4 is the fake one ' w+ h% O/ B7 }

4 l! v, R* W( k/ S/ land so on......................

hello1997

分3組4隻波子秤% [0 m9 h- X, L' t

  C, g" M+ g4 `+ BGroup A: 1,2,3,4
% k: E: ]4 `) c4 J* sGroup B: 5,6,7,8  [6 T. F3 c3 ^9 }  }
Group C: 9,10,11,12
* T, ^) ]9 {) @- SGroup D: 13
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Round 1" K' _5 i5 a$ G/ ^; y& U
Group A vs Group B
2 U& x2 A' D' t; m2 }$ {7 X& ]如A and B一樣, 即較輕一粒在Group C or D
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Round 2
$ ^# Z* d8 \$ F0 A+ s: {2 D/ `再在Group C拆成:8 q2 G5 V8 G) |9 ?+ J. C% i
Group Ca: 9,100 s* o3 l; B8 u" ^
Group Cb: 11,126 A5 R( w& O4 U8 `! f' F2 L
然後再秤, 如一樣, 即13為較輕一粒.# \! W; V6 u! [% M8 o  O3 R2 Y
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如不同, 即較輕一組有一粒較輕波子在其中, , c) ~' r0 ~2 [: }5 m$ A3 t
要再秤, Round 3, 之後便知答案.
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6 e3 ], m. y! \e.g. #1 假設10為較輕的一粒" I& T4 A$ X- M' a
Round 1! s/ e* V4 H8 K) ], q
1,2,3,4 vs 5,6,7,8 = equal
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Round 2- d+ v( H+ @1 Z* e. X4 _! z
9,10 vs 11,12 = 9,10 < 11,126 k1 c+ D* p) A# S8 K! s( x

6 s1 _! |. @3 C) f- tRound 3$ |' {9 o8 s) g. x& K: U$ V) Z& y2 m
9 vs 10 = 9 > 108 y. g9 u$ y2 m; {% t
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The answer is 10.  `" ?1 `. t$ w- M8 D

& B( A! a2 [" W; `2 ye.g. #2 假設7為較輕的一粒
/ E( y! g  \, h, W9 jRound 1
  l* K0 n+ Y/ w; O# S. n1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: \  J" l7 o' [( t2 ?) F

1 n0 K, U& L  KRound 2
) Z& l5 {2 G. `: c5 v5,6 vs 7,8 = 5,6 > 7,8
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Round 3' c. F: O) G% R; y( F
7 vs 8 = 7 < 8
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% o& F  y+ ]2 V3 |The answer is 7.' u1 [( l7 V0 @3 Q7 ]% ^
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e.g. #3 假設13為較輕的一粒3 d* z: h3 G4 E* H/ b8 v. J
Round 1) b& m5 T: L3 j0 y6 \1 z* ?
1,2,3,4 vs 5,6,7,8 = equal
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Round 29 t) B% C" B: S
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! & k& }+ A, f3 [! s

9 E8 y: V5 q7 z: n& u# R0 S/ K. Y[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:' B* ^) L# M* B4 n
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1-6 vs 7-12
+ j; R' u$ f1 bif 1-6 = 7-12     13 is fake0 o& @7 W$ V! l& q
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if not ' }- O0 I6 i/ [1 H* A+ g

! O# b; ^7 ]3 i6 }' J% M: r7 @( ^) bWeight the 2 time
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Suppose 1-6> 7-12
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7 K! L; m4 I7 k# q& b: @4 G1 y4 _6 l1-3 vs 4-6
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6 `% ?* \9 u+ `& p& L7 O/ V) kThen Weight the Third, q0 i! |4 H9 e" p7 A" e
3.
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$ b* X) _( T1 D' ]( b# DSuppose 4-6 > 1-32 R8 m1 M6 r$ M2 u, D; ]2 m
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Just like the first Step
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; R1 J8 o% e0 f8 ~% y) P4 vs 5
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if 4=5 6 is the fake one & K8 u$ `2 A) C' H/ u& y

3 f( J6 G5 Q- H) ?if 4>5  4 is the fake one 9 Q. H6 M/ n" l" `
and so on......................

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, a2 E, f" }  z' s問題第二步
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& x# z( Y: P/ ^Weight 1:  1-6> 7-12: Q; J% a2 b: j
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ @( h/ ~/ e9 [% N& b8 n
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你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步/ V! ]7 B6 c9 ~% n* A
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Weight 1:  1-6> 7-12
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8 j1 U4 F# m6 ~' a3 X; B3 s8 GWeight 2:  4-6 > 1-3
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" T' v0 N4 D1 i% P* z! l- I0 k4 P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