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/ m  S& \1 K0 Z. [- Z' f) b1 N5 ~
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『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)。1 \# \1 X( N; I+ n1 I7 U* X5 ]
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: ( h# h. P& Z: h: I
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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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9 z7 R! V& s/ w8 C( q2 i. Q+ b9 |6 o2. 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:
7 b) T/ v1 F; Z' Q: J# o; U' t& |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,- [3 o7 b0 F# m: c
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。& y# b9 S" ~! P  ~6 C( H' I, L4 X
13.........
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6 ^* f+ B. O3 ?; B[ 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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5 R$ v* r" R- X: S; H# u我以前畫左個chart去答,5 E, H6 J, Z; L7 y/ n' d% a
等我搵下...

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" S& D+ Y7 V9 [7 l* u1 v% K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:
3 L- C+ W9 F4 P5 |% z& A唔識隱藏...已經諗到..

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+ V# J% B, I1 Fsor !!!....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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; ?/ p( n2 _( Q; ^7 I' J( q8 C2 J[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ f8 g4 g/ q- j# \相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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2 o3 ?: ~- Z. T! ]- PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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  ?4 \) _' i1 i+ D  u7 V: HPlayPlay, 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
3 y/ e$ Z) m  Z( \- ?if 1-6 = 7-12     13 is fake
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if not
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1 g  Q# _; a8 A+ z1 I4 ^, N2 TWeight the 2 time   M4 a+ S3 K& _3 A" a$ b; l

$ ]+ w- V$ ]6 @) _- u4 |$ CSuppose 1-6> 7-12
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6 |  Z& ]4 F" T* G- G% d( Y1 F: o1-3 vs 4-6
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Then Weight the Third. B' Y2 n. c" r
3.
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- r1 U- I  T' q8 s4 P4 {# xSuppose 4-6 > 1-3) B: S! W1 z: {1 ^
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Just like the first Step! c2 @1 U* C" ~7 S" B. a3 r

' c% y8 X  q: }2 p- C+ ]% G# F4 vs 5
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/ l9 l8 n( w; `6 t8 d4 }if 4=5 6 is the fake one ' X5 Z/ L0 C$ Q( c" ^

1 w. x7 i+ O+ `7 l3 a# Y% Bif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
0 Y  l+ D: J1 f; Y4 I0 Z5 p: y2 l2 F. kGroup B: 5,6,7,8, h% |, Z2 O  M+ g
Group C: 9,10,11,12) {0 B& c& g2 g. X7 P
Group D: 13$ O& M/ K  C5 V! E: S, S4 S
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Round 1
% F6 X$ b$ H: X+ O& G, ]Group A vs Group B7 [2 O1 f! e* n' f) ]
如A and B一樣, 即較輕一粒在Group C or D
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5 C1 N9 L! n  e9 a. N4 XRound 25 I3 R0 v8 {) }. a  V  h
再在Group C拆成:& Z" W0 E! l. A1 P( t2 @% V4 L7 P
Group Ca: 9,10
1 z* T4 h. m  v9 {6 Y* V& NGroup Cb: 11,12
7 e3 u5 |* Y. D; k$ z7 A然後再秤, 如一樣, 即13為較輕一粒./ u; }7 w% ]4 Y7 N: u* s
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如不同, 即較輕一組有一粒較輕波子在其中,
! ]& s" a2 J* M! ?' u& X要再秤, Round 3, 之後便知答案.( x) u6 v$ Z: J+ `: _8 {; \

8 y$ x4 o" I2 Q5 Z* o: de.g. #1 假設10為較輕的一粒
! x* E$ e9 Y% rRound 1  q; S: D: P% [- ^" D! k" n
1,2,3,4 vs 5,6,7,8 = equal
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: k4 y4 A) o! I5 E) \Round 2
5 l4 [- m  v5 `, o9,10 vs 11,12 = 9,10 < 11,12# @4 z2 O6 [4 H& M
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Round 3
8 b0 D  `( P5 W- q9 y9 vs 10 = 9 > 10, T" }+ B6 s$ r5 N1 ^- ?2 L- m9 X. w

4 \0 S4 g* z: i9 z  l7 I- nThe answer is 10.
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$ r8 K% N5 B9 [e.g. #2 假設7為較輕的一粒
9 b: k* a- @9 P' P  \, qRound 1  K) K4 R2 e3 `
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8! U% W* R( F2 ]3 Y

$ f( l9 b9 T# H5 q' aRound 2- w4 {- t, q6 b: T
5,6 vs 7,8 = 5,6 > 7,8
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' I; W% ~0 P* p' F6 ?% |Round 3' K, L5 D. s7 A  ?! i) Y4 `  c
7 vs 8 = 7 < 8! e) K: b4 w0 {2 m
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The answer is 7.
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# L+ S( D  Z- q# H$ `: Ue.g. #3 假設13為較輕的一粒
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( t* k0 e& i8 W# A1,2,3,4 vs 5,6,7,8 = equal. h+ A$ K! E: [" l

0 \! Y4 Y; f! x! F1 g* f2 wRound 2
( N4 m! R: n  H  g9,10 vs 11,12 = equal
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No Round 3, l1 I% P+ x' H# |/ X, }" B
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The answer is 13.
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唔知我答得正唔正確呢?! 1 f+ j1 V4 S& V* i$ d: D8 v/ X
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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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1-6 vs 7-12
9 l  Y  }: o% |" R/ C6 ^5 r$ K$ g- R; eif 1-6 = 7-12     13 is fake! B. B" ], p# p9 Z

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0 V0 g5 @) f3 a) `Weight the 2 time
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; J9 m  s9 X: eSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third4 s' e7 u( [, W, G0 I' h( l* E& x
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0 A' b7 F3 @9 W9 W1 TSuppose 4-6 > 1-32 o/ V+ r! _5 n8 B

) Q+ ^- U  z# j: j" Y3 JJust like the first Step
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( H( }1 T) ]1 _2 o" {+ I4 vs 5 6 g3 x4 h1 R1 ?. F

+ S+ ?. J" ^& f4 h6 yif 4=5 6 is the fake one 7 z# @1 K2 Q! d) {8 O' }% |" }
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if 4>5  4 is the fake one
4 \% e4 E- P% _, uand so on......................

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問題第二步- H, E- z" E3 e8 |. Z7 p( Y

. G6 I6 i, X# ?# aWeight 1:  1-6> 7-12
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$ p3 G# I! [5 OWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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9 I* T( z- y/ ]5 Y2 I4 E0 j你第三步点去搵 7-12 边一粒???4 b- w! c' O+ D2 E) q

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問題第三步
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5 |. O" c. j; p8 TWeight 1:  1-6> 7-12$ b0 ^) E( {; \- W

: A+ J0 ]/ V! n1 t9 S9 Q* W' CWeight 2:  4-6 > 1-3
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& V1 J' O9 {# H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