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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" V! N. f+ l. z2 R% g$ 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)。/ |, z) t: W% c8 F& a; 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？』
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3 ?6 X5 t, A4 I9 R. X) x. X注意:
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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" i3 Q0 Z& U$ j% |
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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/ |7 ?4 V  B; @; p1 K: l; H

% t- {+ z; y# E, V0 H[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
/ G( d, I2 s8 Y1 p6 S相信e條題目都有吾少人玩...

; v* e4 ]( S% }  s2 Y+ ?# J; Y我以前畫左個chart去答,: p( L6 t* N. O; f1 `
等我搵下仲在吾在1 C  p5 u  R0 y6 |' j0 K4 Q

4 N$ b1 U" c* d6 I$ F" O當日用左37分鐘答１２粒波子，差７分鐘才合格。
0 U- ^$ j, F) H9 I9 P4 e. m# I; t13.........- H/ h4 K! i: @% M5 F
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[ 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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7 H" R6 \+ _/ F/ h6 v% Y/ ~我以前畫左個chart去答,1 \3 |& C7 x5 S9 N8 @
等我搵下...

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* `8 K* `) w2 _: C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:- R1 d/ l9 Y7 S2 e! ]( B8 U
唔識隱藏...已經諗到..

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9 S% S, ~' g+ ]7 gsor !!!....e加改左0 T0 r8 N- P. \! j
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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:
( t7 a: c: B' D- c# S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.( [# v! i' O9 ~4 k
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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, ^8 c( O4 g, d, d7 aPlayPlay, Let me know later who has the right answer and I will add points accordingly.! [& C2 k( w* X! c, j* A9 n3 d

" f, T7 P- s; K$ ]  S0 k9 EThanks

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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+ B3 d) ]3 i( N# A
if 1-6 = 7-12     13 is fake, G' d: ]9 l! H" R! y

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& o7 w5 J0 n! a% i' z8 L, _$ fWeight the 2 time
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* P" Y) r! o+ n, ~! H5 uSuppose 1-6> 7-123 r/ U) w* i2 b. x" W# d; K

4 ~) O( I7 G. _3 c3 _1-3 vs 4-6 0 ^6 z, @9 Z  W$ G" m9 j! U. B
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Then Weight the Third* o8 q. e0 `3 o/ `/ E8 }
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Suppose 4-6 > 1-3& X% |* u8 u- M3 o7 C4 ]
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Just like the first Step
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5 y5 l- h8 H9 o% ~4 vs 5 + G* O8 r  g- x: b8 M" [

8 ]0 I; b  B& Zif 4=5 6 is the fake one
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' H7 t' ?: Y- R0 r8 Qif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤2 ^% [& R6 N% ~+ A

; t7 L$ ^0 P  Z/ mGroup A: 1,2,3,4, z4 n3 t, Z8 @6 A  }$ o: Z
Group B: 5,6,7,83 \9 s; ?# L; f/ N
Group C: 9,10,11,12
8 }: p1 X8 V& X9 w  IGroup D: 13  \+ Z0 M4 r. z! D$ A: R# W' @

8 ^/ }9 n' z6 T; N* x5 m4 eRound 11 a$ {- Z: t. E7 e2 c, N1 ]
Group A vs Group B+ T" p2 m8 ]2 W4 m! [2 r. u7 B
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
; M! l: f4 @3 Q0 M0 _, o# |再在Group C拆成:
! `5 p8 m$ S0 I0 R/ z6 g" uGroup Ca: 9,101 |  D+ x, G- E7 B, _+ W
Group Cb: 11,121 K, A! a7 Z, U& }: a# O3 j
然後再秤, 如一樣, 即13為較輕一粒.4 H( B2 c4 K0 u8 k9 C6 e. G
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如不同, 即較輕一組有一粒較輕波子在其中,
3 E( X. J! D8 _4 S& M要再秤, Round 3, 之後便知答案.
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2 O! v/ Q3 \- F. Ke.g. #1 假設10為較輕的一粒4 M# ?0 P' d. G  O
Round 13 v8 d. ^+ H3 s( _
1,2,3,4 vs 5,6,7,8 = equal
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2 }+ @! q$ H9 |( T- ^% ]8 J' ?Round 2; L; R3 D! W9 A, a8 |" w8 C/ _( U
9,10 vs 11,12 = 9,10 < 11,129 P$ D/ s, }  g
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Round 3
9 l" E$ o" Z# y/ ]9 vs 10 = 9 > 10/ |( {" z: O7 Z) `# _  T9 s' `

% j; _; |9 `1 ~: gThe answer is 10.+ p6 h9 Q. n) i& `% d" o1 G
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e.g. #2 假設7為較輕的一粒
9 d; {' _( h! i& _) XRound 1
' S2 m( K9 S6 Z: d1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2  N. w+ a  z$ {( A) O1 r
5,6 vs 7,8 = 5,6 > 7,8
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5 {5 b' x6 n$ B) m7 w+ }8 _+ }Round 3" \, R* S: _0 G( P3 r% N
7 vs 8 = 7 < 8- j$ |. v+ [+ F9 b) x' z8 t
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The answer is 7.( X$ ^& ?' i5 `. W+ M0 @  ~  r

3 w( Y! Q2 o0 q) P2 S+ Ge.g. #3 假設13為較輕的一粒
1 s! \! H$ s9 m5 W3 zRound 11 d9 G% A1 Z  Z# @6 k# e
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
6 Q2 ]& R9 J3 }# f7 r2 a. s9,10 vs 11,12 = equal2 K( f; o. X! @$ v
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No Round 31 m4 ]/ u& h5 Z1 O

' V  \$ G5 d  i$ v/ ]% gThe answer is 13.% ]! p  i" e) C
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唔知我答得正唔正確呢?!
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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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5 h1 \* r/ u8 u4 T1-6 vs 7-124 V+ i/ }$ @* N
if 1-6 = 7-12     13 is fake9 R" K# ~: D4 C7 V; d) L" O6 P

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Weight the 2 time + ?  @# e8 F8 u1 P

2 A* l" q* I. n2 L+ b: mSuppose 1-6> 7-12
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1-3 vs 4-6
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, ~1 w" X8 R& \4 M4 AThen Weight the Third
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Suppose 4-6 > 1-36 G% a/ k# w6 L0 s0 b5 u) G" X6 }' P
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Just like the first Step
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' E: H$ A) J/ p# b9 o  k% M- {4 vs 5
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6 ^6 K- c' g2 vif 4=5 6 is the fake one
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1 g4 e- F2 z+ Oif 4>5  4 is the fake one
2 w, ~- U3 v4 s- ~6 [1 Gand so on......................

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問題第二步
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- n8 _4 m! z9 V# V$ v9 s% H/ p; HWeight 1:  1-6> 7-12. a8 P4 m# P" M7 S% l2 _  }
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; I4 E6 ~- A3 g  x0 m2 K% ^
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你第三步点去搵 7-12 边一粒???* A8 a! [1 v) h4 B; ?5 T: s# l8 R

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2 f4 s# \. `3 b/ v, U問題第三步" w( ~/ a: ?# e$ J( _" U1 s
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Weight 1:  1-6> 7-124 g  @% }! F* X* U

) J6 a/ y5 P. G( PWeight 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