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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2 A; y& K6 h: k1 G3 K0 Z0 D『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)。7 F+ S* Q2 O) }3 ]$ V( y
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: : W" ~% g. c+ ?8 D1 ^. G
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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( H6 l5 o0 O5 E$ R" z! D

# C1 ^& j8 L, V9 D$ }: [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 21:34:5 Y( v% |/ ~, x3 x: S% J; y
相信e條題目都有吾少人玩...

. X0 A! ]* X7 X/ L0 h我以前畫左個chart去答," @+ Y' i/ r0 u+ J2 W0 {$ K9 F8 [
等我搵下仲在吾在
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* N' Y; v8 |0 }當日用左37分鐘答１２粒波子，差７分鐘才合格。' R# {0 l7 }) H8 U
13.........7 j& U5 V0 ?/ t9 F, d, ^

: t4 Y4 O. k0 k# D[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:, ?' o" Q% J" }# t# M9 D4 Q

4 x: T! \, D6 {我以前畫左個chart去答,
* H, n$ W4 g: |等我搵下...

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9 }5 P5 |! H' V# T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:
9 x$ L, t; B. I唔識隱藏...已經諗到..

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sor !!!....e加改左% @/ j0 l2 {9 K; T* N* o
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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:4 a, U1 f* [6 U5 V2 {6 x
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.7 V; A" T+ C. F1 X$ D3 D1 b9 ?, M

0 m  _2 f0 g9 S/ D0 WThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' @( l2 q/ Z& n+ v! O

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.; g% l; G& n/ \8 L: l5 _" W

2 q7 }$ J/ n% S( m. \' MThanks

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% Z8 I% o8 M+ Q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
& }% p8 E) O3 q( Q6 tif 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12
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7 C  f  w- ^' G; p- E1-3 vs 4-6 % V  l, S3 p+ C- p* W
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Then Weight the Third$ ^' I; L! t" T& |/ t
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Suppose 4-6 > 1-3
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' `, r- y' Y' }) T; ^Just like the first Step3 R4 c) C+ |; g# H" f3 @: P
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4 vs 5
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if 4=5 6 is the fake one 5 ]8 u/ N2 l$ F1 Q# u2 p
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if 4>5  4 is the fake one 2 z! `4 Z  ~; t6 N7 Q) R
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and so on......................

hello1997

分3組4隻波子秤
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$ [: |( j  I$ g, CGroup A: 1,2,3,4" L; k+ y) U. h
Group B: 5,6,7,8  p  I2 m( Z; h& y8 m$ D! r9 s
Group C: 9,10,11,123 @. X7 t* d4 O
Group D: 13
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2 M" |; y7 q4 N) b  A7 xRound 1
) L2 h: E0 V5 F1 E5 HGroup A vs Group B' ^! t3 [( {, T+ z$ b+ p+ _
如A and B一樣, 即較輕一粒在Group C or D
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6 f, _" [7 R/ ]4 B6 e  VRound 2
5 v5 |+ T1 \. r7 E再在Group C拆成:. |  B# K! g% {
Group Ca: 9,109 U. B, V" y3 F7 ^8 a; N
Group Cb: 11,12
9 e4 @* [. g& `8 v5 i% r8 p然後再秤, 如一樣, 即13為較輕一粒.* }; d5 _1 H- o* J- e
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如不同, 即較輕一組有一粒較輕波子在其中,
  |2 ]( N' N, g4 o, A要再秤, Round 3, 之後便知答案.4 y, p8 {5 l! G8 o5 [
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e.g. #1 假設10為較輕的一粒
- C1 J9 H6 b8 \  dRound 1
7 x0 ?# F" H1 {: @5 x" ~1,2,3,4 vs 5,6,7,8 = equal
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Round 2
, G( m  I" ^1 J  @' N! |9,10 vs 11,12 = 9,10 < 11,12% G3 O% A! @& z. m* `- q0 }. ?/ r

6 ~* L1 G4 ^  p# oRound 34 j( G  u$ p6 A$ |! s
9 vs 10 = 9 > 10
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The answer is 10.% R. |  J4 H' Z1 G! f5 ]7 c( V
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e.g. #2 假設7為較輕的一粒
9 H* x. L- G! ~9 q1 yRound 1& m* q  V3 s* }( y6 B9 p
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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8 o  ?8 E0 M% ]: X& N% Q/ RRound 21 l3 L3 I$ d* h- w5 M. m9 W
5,6 vs 7,8 = 5,6 > 7,8, R  ]$ ^5 V, S1 @( o! q6 p

' ]+ _1 Y5 r- M1 Z1 }Round 3
; s# [+ R/ n- t5 H7 vs 8 = 7 < 8
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The answer is 7.1 S: o# \( J% \

* V. t) h7 @3 c# l; D; h8 D, [e.g. #3 假設13為較輕的一粒
# W- C  Y$ b! Q7 S0 y4 U* }Round 17 C. Q6 a# X) t# {3 W; o
1,2,3,4 vs 5,6,7,8 = equal  S8 k% i8 C9 }

4 z* g* y: W6 n0 m8 ?1 CRound 2% D, G4 j& Z! u( R4 B/ E1 d6 K
9,10 vs 11,12 = equal
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No Round 3
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1 n/ [6 r) l$ DThe answer is 13.
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0 q/ u/ m6 j5 Y+ l/ E( E唔知我答得正唔正確呢?!
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/ z1 x5 v, O$ f[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:6 p6 v* [3 o8 {3 w0 C. p
1.
$ _1 r3 p) J0 ]3 F, ~8 G1 e1-6 vs 7-12' f' f/ ~6 @2 r! r: ~
if 1-6 = 7-12     13 is fake
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& F1 r9 L# U* f- @' jWeight the 2 time
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Suppose 1-6> 7-12$ u" ?& g" ?5 x5 t& R

" _. [$ Y9 O# o6 x: c3 |1-3 vs 4-6 0 [  A+ A, y  M/ n
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Then Weight the Third
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. {/ `2 e7 e  a4 n7 Y: {/ qSuppose 4-6 > 1-3
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1 E$ b) @  K8 k8 }5 aJust like the first Step
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# w6 b5 Y% g8 O- l* H$ u8 Q4 vs 5 " t: G) L& \% ^, N# l5 w
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if 4=5 6 is the fake one & Z6 \" m  P# K1 ]' F

2 }4 A/ j5 n5 b( ?if 4>5  4 is the fake one $ E$ n5 ~( p, z: |
and so on......................

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問題第二步4 |1 }2 q4 Z) y; u, a

$ H& W, \" n' j7 I# |Weight 1:  1-6> 7-12: _+ i' M* e# o& E0 u' l* l
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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# i9 j. J  `, B9 U  h你第三步点去搵 7-12 边一粒???1 F$ {/ O# t$ A  {
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問題第三步
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, t) z; r1 U0 h5 t8 u# gWeight 1:  1-6> 7-12( _; W7 G- g6 Y& B, R+ }8 W* a
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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