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5 X9 ?1 X* e2 a# H2 H
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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)。$ ^" D  i0 Z* j, q  U
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？』1 m: {6 B& {: @8 T4 S$ e1 u9 ], A/ K% l

) F, k; N3 R7 w0 y, w* `3 @8 f" S注意:
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8 M0 F( w  O2 r4 t% Y! U1. 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) s) f* l+ A8 N- Q
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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 21:34:6 @6 k  u6 N5 `6 X1 w$ Y0 F  K
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,9 K7 m5 e9 T. m* m% u% q5 O
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。
# h1 F/ V' m& j13.........  i& O6 M. y. V8 q8 D: ^- R, `

+ `! B$ W5 z# W[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:: n2 R' t! Y. s7 A, Y# @3 m3 Z7 T
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我以前畫左個chart去答,
7 ]$ U! p( S5 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:
% i0 A$ D) g# K8 V唔識隱藏...已經諗到..

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0 y. y2 j. P  Q4 usor !!!....e加改左' V5 S. l; o( d4 `0 E

# S3 ?) ]1 ]: }. j, @# p& @  B2. 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:
3 _1 {4 h8 V5 y3 R$ Y0 F8 d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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6 ]& H% D6 y4 w8 n( e" ]3 `Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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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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7 R% v7 Q% U6 k6 r- |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
- t5 w2 r$ i; Sif 1-6 = 7-12     13 is fake( S# S. k4 _( l- p/ u

% @4 A3 k  k  X, D: y! P7 Rif not
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Weight the 2 time
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Suppose 1-6> 7-12* k4 R2 J& p# n0 u( [0 W9 m) r
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1-3 vs 4-6   ?& [0 i1 J3 M8 n; n3 @. T3 ?

( a) x- _3 C$ m5 j" kThen Weight the Third
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8 d/ `7 [0 a& M" f) ?Suppose 4-6 > 1-3, C$ U; V0 }3 S) E1 m
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Just like the first Step
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4 vs 5
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7 p" R% I/ O, zif 4=5 6 is the fake one + u) u  c: e' G; U
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if 4>5  4 is the fake one
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3 l6 t* E  Q- H( B5 C' `8 Qand so on......................

hello1997

分3組4隻波子秤
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0 p1 P3 t8 U9 A! \  B9 sGroup A: 1,2,3,41 I  e: D5 S. E8 n
Group B: 5,6,7,8
3 [8 d& _. X7 b+ o: RGroup C: 9,10,11,123 g0 r3 M% ?- ~
Group D: 13# a& g0 D, x& H$ Y

) D0 r& P' R  O) W: W+ m$ A9 iRound 11 S( {/ k+ B, d# S( E- h0 N
Group A vs Group B; U3 I( S( |8 q. M/ U
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
1 U0 s, L+ t1 L再在Group C拆成:
- {  s: [, N4 V+ RGroup Ca: 9,10
. j8 P" T" a4 Q4 P6 AGroup Cb: 11,12
, x% p; q7 q& G9 U% l然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
% X) B  u0 L2 i( r8 F; `+ Y要再秤, Round 3, 之後便知答案.
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9 Z5 ?8 [- N6 f4 He.g. #1 假設10為較輕的一粒8 P; \5 t3 X, G$ A# |* U
Round 1
; \( ~# p4 N2 S4 Y1,2,3,4 vs 5,6,7,8 = equal. b* J' i8 ?9 K2 ]. `: L
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Round 2
# M  @0 Z& D$ ^2 Q& u9,10 vs 11,12 = 9,10 < 11,124 N8 k3 w1 q. A' N  Y! ~% K
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Round 3
$ r$ x1 w& C0 `" G9 vs 10 = 9 > 10
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8 j! R* Q" k4 p( @The answer is 10.
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3 ]0 F  ?9 Z& U3 u. |e.g. #2 假設7為較輕的一粒
6 C% [- T! x( L' W  bRound 14 F5 d, X2 @* p2 Y3 Y8 U
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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8 X1 f, r( w: P$ B) C# c, a5 ~Round 2
! i# W5 C. ?$ ?0 e& t3 o5,6 vs 7,8 = 5,6 > 7,8
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Round 3# A. U6 x  ]! Z# ~5 E2 W( k
7 vs 8 = 7 < 80 C* w. G6 p" ~) o* H* b: L) V) f

) i4 H) ^  ^4 w# @The answer is 7.7 J- K! R( ?( R  x
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e.g. #3 假設13為較輕的一粒2 ~; Y' B8 q* j- k* @
Round 1$ `* T3 v3 B2 ^3 {) R4 Y
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
$ x* U, D+ d- ]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?! , j+ g: }; i! I. O0 _. N, Y

$ k" r, l$ d$ H* t[ 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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, f- b3 k0 V3 m" o8 t8 r3 z1-6 vs 7-12
0 D$ _1 y3 k. b; V. N# Jif 1-6 = 7-12     13 is fake
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if not 5 Q/ ~  y) h' x" E! U
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Weight the 2 time
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) C1 M, [7 s" |! x, m" m* M, ESuppose 1-6> 7-12) Y9 ~- b) t- B' p9 _; p; L( H8 @1 h
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1-3 vs 4-6 6 R3 W$ U* C% w% H3 o+ z
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Then Weight the Third. [8 G/ e' {1 \. l/ {" V
3.
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4 h: D  ?! n  t  n) @1 o! HSuppose 4-6 > 1-3- {7 h2 b4 E) u0 ^: u6 [

1 E8 T' a/ c% |Just like the first Step  V8 S5 b) b+ z. x
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4 vs 5 . r0 U; W# Y: N( D; c4 {* ?

' M2 C  z* }& \if 4=5 6 is the fake one
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2 w) s2 V. B* N( _* T$ g, |if 4>5  4 is the fake one
% M1 Z7 [1 a' i) Gand so on......................

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6 K. ~) b% ]2 J5 I9 b2 i+ Q問題第二步
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Weight 1:  1-6> 7-12
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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???
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========================================
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問題第三步. d$ F% @9 M. o

, }( {- ~* f4 _. k* y; m4 K% @* g: \Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 ! I4 u* `- L  M$ a
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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