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
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1 Q' {1 S, a. W% [% _『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)。
& @6 x/ W& [% s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？』- B% a- e+ \/ q. R

+ j1 h- }' \, z. G. @7 B$ Y- `  H, G注意: % M9 J; \' u4 ~9 e6 i$ d

/ G5 X0 H4 ^# ]' ^& r% s1. 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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; d3 P8 f; _4 a: D8 _* b[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:5 v3 E5 A& u! h9 j( V9 Y+ i! s7 \2 t
相信e條題目都有吾少人玩...

' u1 @: p% c* F我以前畫左個chart去答,
; _* u% X# A  M! y等我搵下仲在吾在# F, o; h0 ^5 A8 O; ^% V" N

; f+ R& |* D8 @6 f- L0 e1 X當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ v& Y/ X9 I- U  q+ q8 D1 l13.........
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3 [, ?( q* q' A[ 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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/ r- n2 w; ]( c: ^3 c) Y: n我以前畫左個chart去答,
' A; Z4 |4 b( [2 O& `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:1 `4 d9 c$ E& v8 @( F
唔識隱藏...已經諗到..

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sor !!!....e加改左$ C3 e' K5 Y! L

# \! ~5 C( q9 Z1 P2. 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:
5 E5 Z, `% ^: s  o" l3 h相信e條題目都有吾少人玩...

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( c) i- `( s% g' bPlayPlay, 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:8 z5 d0 r: V0 _8 d$ I; l. B

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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& o- V# U6 [& _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
, B  ]0 J0 X$ |9 s- @$ ?/ Tif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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: `5 P2 q4 g( i- ^' ?5 H" cSuppose 1-6> 7-12
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( j! F3 S3 k7 }" e1-3 vs 4-6
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Then Weight the Third+ D# i( R7 H. R0 s, T$ G& }: E
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Suppose 4-6 > 1-30 _3 e( v6 ^8 {+ U9 H

8 f, W" m. w% wJust like the first Step' x, j3 m! v1 D. j& _5 O

  [6 \# [$ e7 L, h3 f4 vs 5 3 d7 {: {1 K( Y. l& p* v5 |( V
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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8 r5 w& ]4 P& U0 z9 band so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4! J6 F5 g7 z- q; a: ]( q
Group B: 5,6,7,88 a: ]; F% l; e% H. S
Group C: 9,10,11,12
' z, i$ ?: s* d4 E+ M+ [. A' Y* ]Group D: 13
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9 O7 }% O/ n6 |) E8 f/ G- sRound 1/ p2 T, i9 w6 ^) x( f, r2 @  c5 M& l
Group A vs Group B& a% `1 e/ Z* V/ Q
如A and B一樣, 即較輕一粒在Group C or D
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Round 2& p" z, Z" d: T& y. g4 q, p4 |
再在Group C拆成:
$ P% r9 y! @: E2 |- J6 iGroup Ca: 9,10
# Q, o. A! C; s- ^$ Z: {Group Cb: 11,12
! p5 l, I: |$ Z( ~  @8 Z然後再秤, 如一樣, 即13為較輕一粒.
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5 L$ K9 \) V3 @# m7 K如不同, 即較輕一組有一粒較輕波子在其中,
3 Q4 n% G0 }, d, \4 N4 [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) d: W! K6 r4 A# f. N: F6 j! ^# Z
Round 1
/ w2 m% {3 Y$ z& P1,2,3,4 vs 5,6,7,8 = equal
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Round 2
7 n% B3 T' [* a* B0 f) `9,10 vs 11,12 = 9,10 < 11,12
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' D/ b( S) X6 L' O# hRound 3) m1 I6 H5 C# o. j
9 vs 10 = 9 > 10- g" f8 d  w1 w$ b6 M& `
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The answer is 10.1 d- s; a8 o: _' @1 ]

" |" o& ~) p8 S$ ]; G# ue.g. #2 假設7為較輕的一粒5 _) d0 h0 i6 h& ?9 S7 Z- G3 X
Round 1
+ L$ q/ i. F7 q3 Q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: n* r( u- _, k, z; c) @5 k) e

/ E- t0 u  }' u( {9 mRound 2
. F$ D% {& O; H2 x1 j' A- i5,6 vs 7,8 = 5,6 > 7,8( i& [9 E" }4 X5 C$ D/ g7 j- N; c

% Q" Q0 q9 F& q1 i; kRound 3
* n( \  \8 ]4 P! r/ }7 vs 8 = 7 < 8
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The answer is 7.
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, A  d: }8 `# Ee.g. #3 假設13為較輕的一粒
$ X$ f: p7 @! u% G3 eRound 1
, `: `1 g% V! [+ J. J1,2,3,4 vs 5,6,7,8 = equal. c# C6 ~0 C, {# e+ s9 {5 L+ f

3 M& z+ K8 d: |4 r! r: [Round 2' n8 z2 M4 I* w0 S% c& d
9,10 vs 11,12 = equal
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No Round 3
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: Q% |: Y2 E; U' [8 jThe answer is 13.) [% e6 p+ z% v3 _/ J; o6 k+ C- E

  a8 e( }" _* ?( x/ P1 l! s1 s唔知我答得正唔正確呢?!   T1 y# Y- [8 R

2 a) D) N' ?. |: b1 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:
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# S. o5 q2 t/ R3 ^' Y) Q1 \% N  H- U1-6 vs 7-12
0 t/ v: w! q9 b6 U! Dif 1-6 = 7-12     13 is fake% W0 a- t  J% D% l
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if not
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& t! Q8 {; p5 e3 I1 Z1 _Weight the 2 time : b) q& j. D+ D) d

4 k" C, w8 y4 D2 \  M! uSuppose 1-6> 7-12
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1-3 vs 4-6 / c7 p& `9 ^( d& |+ Z

* Y; t! l1 ]" {: u# G$ `' sThen Weight the Third: V7 t5 O: F1 r+ @$ M. B
3.
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Suppose 4-6 > 1-3# [1 g% |& x2 J5 [  _' I3 t

& M: M& U8 j7 CJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 3 G7 h/ q3 I  d  e
and so on......................

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9 x8 |4 v6 A( K- M問題第二步! L7 z' M( c" ]: E: m% E. M' R) i$ D
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Weight 1:  1-6> 7-12% C7 T; L/ ?: ~+ M# W$ \& q
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???  D$ D1 s4 b# l, t' }. j

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問題第三步
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Weight 1:  1-6> 7-12: m( z# D6 Z7 g! O( N

0 n1 x- o' p  M' o" @Weight 2:  4-6 > 1-3
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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