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/ U: E+ D' @) D4 M

$ q' y* M) J/ v- f, v- x' ]# K『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)。! Q' ~! F  f' e) c9 o* E
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？』0 y( w' `2 S: F5 f
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注意: % H8 C- f3 u: D3 [! ^8 R4 A* e
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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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; N& u5 @4 ]$ X; ]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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4 d* ^6 o, ?  m& g8 E4 m[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 V6 d' ?1 j: L; c2 Q相信e條題目都有吾少人玩...

4 k: c+ [7 T5 e, r7 [% _. B我以前畫左個chart去答,! n4 Q1 I6 k/ }4 m
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。# m3 a9 ?" `3 u
13.........9 \/ o9 \" t9 i6 K- B

0 i: u! z$ c: _& L[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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我以前畫左個chart去答,
2 w* U" y0 [4 j/ l+ A, r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:
: b$ c* L& T* |% x; b, ], v唔識隱藏...已經諗到..

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2 Q: _; L* ?8 o$ Y# \* M, g7 ?4 Usor !!!....e加改左/ m6 h* i9 c2 h; ]
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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6 [7 n5 V7 Y% M# ]: C+ j

& n, y3 \* @; v( w[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:) Q& j: q# j1 T
相信e條題目都有吾少人玩...

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: t% E( Q! q5 a$ a9 C! fPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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1 v$ Z1 Y; Y+ m- VPlayPlay, Let me know later who has the right answer and I will add points accordingly./ o% C6 E$ V  F6 L+ Y( y7 ?

" H+ n. l$ F* E; uThanks

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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
4 T! p; f# D0 W& _# u! iif 1-6 = 7-12     13 is fake* U2 z" D; N' o' ]" v! a! I, u
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if not
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Weight the 2 time 0 k: |+ E; _! J4 D1 v
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third! ^) U- ^  ^# E
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Suppose 4-6 > 1-38 [: M  ?$ E- p# H6 M

$ p) L3 v. X+ l0 f4 l/ i! mJust like the first Step
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4 vs 5   C6 k9 Z; ?* |' L- _7 ^

) _- j* n7 t9 F2 f* T* xif 4=5 6 is the fake one ; [+ d2 h2 n1 D; s' _/ ]  [
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if 4>5  4 is the fake one
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& @; D! {/ m* D& p& Q4 c9 ^" h. zand so on......................

hello1997

分3組4隻波子秤/ ?' P  m+ F! G! L# I

8 |" H3 y3 _  |, P2 F7 _Group A: 1,2,3,4
. T4 W* v6 @3 o$ f! b+ B) UGroup B: 5,6,7,8, g- u" I6 \: e$ F: ?
Group C: 9,10,11,12
0 p! q; V0 I6 FGroup D: 13
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  L* e( b0 V9 W/ {% E' lRound 1
  i9 n3 b* ?9 f' v0 c/ A0 qGroup A vs Group B
2 |0 d3 j2 R! ?/ }9 m如A and B一樣, 即較輕一粒在Group C or D
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6 {7 r' W1 Y1 u# t% n% cRound 2( ?$ Y+ j, r  }2 ]- u
再在Group C拆成:& g  [* e% e8 s9 u4 _0 A9 c1 z
Group Ca: 9,10
5 j3 }6 U$ h3 N+ yGroup Cb: 11,12
- L4 A& @. F+ g然後再秤, 如一樣, 即13為較輕一粒.
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" ]! d; [! `% o9 R$ \4 i- A, B$ s如不同, 即較輕一組有一粒較輕波子在其中,
$ i+ i7 e2 k0 j" f+ ?# v, k: L; o+ A要再秤, Round 3, 之後便知答案.7 c) e9 |4 Y4 S; p

) ~( |3 Z9 {: d( D5 Ne.g. #1 假設10為較輕的一粒
6 T, w* M) U8 ?' N# x- T4 k2 j! }Round 1" O/ M/ d: _, `: K2 R- v9 D, K# v
1,2,3,4 vs 5,6,7,8 = equal1 |. B% D- H8 q. l5 [3 r

9 B% K5 H' ~1 r8 u  _5 e# `: G3 oRound 2; q/ Y6 |. S) i- G
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
7 g$ h- T# t$ p  f$ v3 ?2 Q9 vs 10 = 9 > 10
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, ]" l. ~) g( s. O- N& D& H* T+ KThe answer is 10.' |* z$ I5 C) V
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8) T& j2 ^' Y2 U7 Y! o

, v# y2 E2 m* w) B4 r9 T; m0 gRound 2
/ f5 z5 N3 ]  b, O& z5,6 vs 7,8 = 5,6 > 7,86 B8 a' ?, @9 t% B

1 M  e: }6 B( F3 {Round 3
7 M# E+ R5 W* y/ {+ ^7 vs 8 = 7 < 8
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( I  b! j6 c* A$ l/ m7 y/ WThe answer is 7.
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e.g. #3 假設13為較輕的一粒/ J& y5 n$ |; F* g( K$ M
Round 1- ?- ]7 m" B, l6 J  [- d
1,2,3,4 vs 5,6,7,8 = equal
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Round 2/ _6 P) v) G6 }* j, C( C9 v! ~" s4 J0 v0 c
9,10 vs 11,12 = equal
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No Round 3
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8 `8 U9 C0 C  r: G8 i) aThe answer is 13.
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唔知我答得正唔正確呢?! 8 {& F" ~: Q( F; u  `! _- w

) D! q) v* L: A[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:% F! f9 L$ o  I% _) e% v& g
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1-6 vs 7-12
4 L# d# S8 q5 t: x( Uif 1-6 = 7-12     13 is fake! ?2 O: [' W  [  H2 M9 b8 v0 ?

5 I$ E9 ^: y6 ]% U: Rif not
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Weight the 2 time ; {& [8 N" q  B/ ?7 {* _1 o

- P& a$ k0 }1 E9 L5 K7 gSuppose 1-6> 7-12
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1-3 vs 4-6 $ o. E7 O8 A* n# ?
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Then Weight the Third
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Suppose 4-6 > 1-3
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* g# r. N8 A! `: iJust like the first Step' @" a2 P% B& B" c* p

! k7 s8 l3 b6 r0 I- w0 v9 L4 vs 5
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if 4=5 6 is the fake one " X2 X3 g8 h( P- m* X
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if 4>5  4 is the fake one 2 A/ y  u3 ?2 h% K6 H
and so on......................

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$ [+ B  {$ D! W' N- F問題第二步
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Weight 1:  1-6> 7-125 d, U& V4 m9 {. u

, I: U7 U: q: J- {4 m* Z8 Y! Z; rWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6# D/ L, h7 i9 [) i  V5 o3 `
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你第三步点去搵 7-12 边一粒???
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* q! m" d" A+ F0 x, h! \$ n; ?問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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6 P8 O  Z) F, s9 Z  q7 {# \# c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