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/ _$ X8 {6 w5 _  ?7 G8 J

( }3 B0 @$ P, |7 i! C  L; @『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)。5 Z8 {" m3 h4 F! l$ l4 s7 I
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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9 j. o: S4 F" `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4 e  V( n* {" d

" y0 a% U1 b/ R; W5 j9 f1 {5 _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/ p/ F# B& v5 _; C( k3 _6 j

/ Y# d' H/ M0 O; H' p* H$ O3 O[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:& V2 A  J! B/ Q6 J
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,
/ @4 M$ l3 Q+ @# e8 J" Q等我搵下仲在吾在7 ]# s. z6 f6 N( O) v+ b$ J% u( z
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當日用左37分鐘答１２粒波子，差７分鐘才合格。& K7 O: P, f, G8 p9 p
13.........* R0 K# ^, ^! M* |

2 S( U5 l9 ^( K: a+ F' R* l[ 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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我以前畫左個chart去答,
+ A7 g+ c1 |+ ?% B  y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:
% q6 a' P) `" i' I& N" @3 x0 I% b' @唔識隱藏...已經諗到..

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sor !!!....e加改左3 B. r$ R- D+ x
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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  N9 G9 T& Y: p3 \, I
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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:7 P% B6 a% Q( 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.* `# Y' h  r7 B

% S0 v$ ~2 Z  M% J- HThanks

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.% D# h6 C4 h3 F7 x  g
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Thanks

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5 {4 @! ~" m* D. R( h0 K( K不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
" k8 O" S( [$ d& k1-6 vs 7-12" G3 ?! X6 H$ c' b
if 1-6 = 7-12     13 is fake2 ]) a* D# z$ k$ D! I

! e1 V4 N0 c! r( Z' aif not
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$ l, |' _' v: E/ E; R4 N8 r- ^1 w! ZWeight the 2 time ) t' Y+ N: o" @+ u1 o/ y" F

2 b& d4 @  \1 o( a7 f# o  D8 [( @9 qSuppose 1-6> 7-12% N( s2 g  C% q. d8 K
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1-3 vs 4-6 1 S, u( x) |9 E! @5 @. J

9 u( S( k: R+ j0 ~3 _- d( OThen Weight the Third
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Suppose 4-6 > 1-3
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# A* N! V7 A, u. c  NJust like the first Step* N. R1 Q3 k5 ?

6 S, o+ r- N, b% x* y9 j4 vs 5 ) w8 T% T: @. B3 J

" l- Y7 L) B; v# W0 g9 N. M( a) Wif 4=5 6 is the fake one
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/ @, W; {8 H3 k. ~! ]! tif 4>5  4 is the fake one , F- f# L5 l# V+ |: |% j8 M" a
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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. X+ c! y9 H4 h7 S6 F
Group B: 5,6,7,8
8 E/ C! M  l7 v7 [& W7 R6 S  `Group C: 9,10,11,12# W& ]# [& d9 G( E& e
Group D: 13" R6 c6 B' k2 U7 q
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Round 1
- I$ D& U0 }* SGroup A vs Group B
/ Z0 o& Q" J/ `% o4 b/ W如A and B一樣, 即較輕一粒在Group C or D
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3 s4 A; y6 ?' ZRound 2+ |2 M) t  c& F2 L/ o
再在Group C拆成:
; r0 x1 A( E7 A' jGroup Ca: 9,10) d/ q) N7 q9 g. B  g& \* s- w
Group Cb: 11,12
8 A2 _7 ~3 {( Z' v+ Q然後再秤, 如一樣, 即13為較輕一粒.
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* H, l1 v' ^# ?& E如不同, 即較輕一組有一粒較輕波子在其中,
+ }5 @  i& B$ w- Y2 ^要再秤, Round 3, 之後便知答案.' E" J, k8 }! F! _, R) g6 x7 }! r
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e.g. #1 假設10為較輕的一粒2 P9 B0 R9 o9 I2 A/ Z9 `
Round 1- B1 w3 z, C" [* i
1,2,3,4 vs 5,6,7,8 = equal
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Round 2: M1 m7 ?. O+ b' b0 T3 O
9,10 vs 11,12 = 9,10 < 11,121 N& V2 k9 R  ~* n. g: K$ _  K

: A+ \& ?  S; `1 m0 _, i0 KRound 3/ q/ U8 R; j; m! q
9 vs 10 = 9 > 10
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The answer is 10." t0 T1 T; b' |0 O& I9 q
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e.g. #2 假設7為較輕的一粒% f+ I" n! i: m6 Q6 n7 n$ f
Round 1
) [. d8 I1 a( R$ ]1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ i& j; G' w, V; T# g6 d" v
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Round 2
) h) O# E4 }8 Z2 I5,6 vs 7,8 = 5,6 > 7,8
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Round 3- ^. W* Q1 x, Q! S% |1 l
7 vs 8 = 7 < 8
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3 u5 y% _% x0 W9 {4 I# ]  Z6 ^* _The answer is 7.5 e& J2 `. P! M3 R
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e.g. #3 假設13為較輕的一粒& A2 u; W/ I8 B$ Q9 d0 f
Round 1
( ~) G5 C# m; g# ]/ J1,2,3,4 vs 5,6,7,8 = equal
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Round 21 E' }$ D2 r0 v" T( l! G
9,10 vs 11,12 = equal, f" n2 n$ f: E" E$ V! Y7 D3 A  N
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No Round 3
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4 j( Y! c0 W  a, z, J( A& }/ e, X7 bThe answer is 13.. \6 B" D% _- d3 s- q
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唔知我答得正唔正確呢?!
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0 J$ U( {1 F* H$ P1 j# k6 }3 H[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:2 ]. t$ p, ]3 [! E( V" U7 }% ~
1.
+ J& M8 E% L: [+ R1 y1-6 vs 7-12
5 Z* j! a: s0 u. c, _# @0 hif 1-6 = 7-12     13 is fake
8 d2 e" K+ U; P2 j6 O0 B/ T1 V2 w) @# Y( O1 F# o
if not * m) [# B( f: s: u

; Y4 D' H# c# C/ r2 a2 f0 G& p3 \0 z$ WWeight the 2 time
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" A3 l5 z6 _- K: u4 T+ L# C: t+ tSuppose 1-6> 7-12) h3 y$ M! i# z7 ~/ k1 U

/ x: T5 g$ K( ~2 }0 r1-3 vs 4-6 # w- k% e/ C, L' ], {" i

8 I0 S* u. ?0 L" h. T% l9 f( y6 PThen Weight the Third
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# R" h1 Y2 s7 d1 F" y3 q$ g
Suppose 4-6 > 1-3
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Just like the first Step% }) u. [, C9 a- K6 ]- X5 D

& Z+ i  @0 T* ?5 x5 P" \4 K8 V& O4 vs 5
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if 4=5 6 is the fake one 3 n" w8 u& G. A6 Z( C
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if 4>5  4 is the fake one 5 l9 ?8 V) p  ]4 n  G  ]- A
and so on......................

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3 O" p# K; j5 T問題第二步
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Weight 1:  1-6> 7-12
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; b- u  K2 h% e5 gWeight 2:  1-3 vs 4-6 , if 1-3 = 4-61 [5 j5 l) j/ l/ I' Q' ?& }
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你第三步点去搵 7-12 边一粒???
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) B5 i& z7 I9 ~! \5 ^' R問題第三步
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Weight 1:  1-6> 7-126 X( w  {; {' G& V2 i
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Weight 2:  4-6 > 1-3 1 s0 h; \' C: k8 G4 ^+ x
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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