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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『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)。* y8 o/ `1 t4 ?
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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2 _9 l; Y# v2 j$ X4 {( w1 {, \3 t注意: 3 j& E5 v; L. f6 j4 X9 c$ s% E

  X) m# f9 q4 }# H. j, e6 q1. 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: y6 s! O/ Y1 c% c* M1 {& J) O3 _) T

8 k- h; K- i# f" S% V5 a2. 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3 E3 J$ E' u8 k% p% r

$ R$ Y2 ~7 I$ U# Q- D. z) {6 z' Y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:, i6 |# \- l. W) U
相信e條題目都有吾少人玩...

. ^: a% |6 ?0 }9 H2 e6 M; d我以前畫左個chart去答,  n# F; u2 }# W& @
等我搵下仲在吾在, [* Q7 y3 m9 B. m& L& r* I; u8 O0 |" L3 C5 Z

! p. ^. Q: b; }當日用左37分鐘答１２粒波子，差７分鐘才合格。. C8 r0 |% c- ]- ?/ q  _" J2 s
13.........
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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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我以前畫左個chart去答,
* F5 x5 w8 v  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:
8 y. o# y2 [1 L5 T3 k6 z9 ~% @唔識隱藏...已經諗到..

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2 Y( W, J8 N' J" Esor !!!....e加改左
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8 R7 u( [1 ~; S: g2. 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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) w/ y1 z' X. Q* E# j9 b$ t; F[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
* \- G/ d7 I) h3 B相信e條題目都有吾少人玩...

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. z3 R" |, Q* _PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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$ M$ a9 {8 K: @9 U  BThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:! C5 r( u# Z6 G

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* ?/ \& `; g7 n% l) GPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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8 v5 D0 H5 Z2 f& S6 z+ a+ z& kThanks

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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

1.
" Y3 x5 K& q. r. y4 A1-6 vs 7-12$ g- C, C1 t  i! r( r, V
if 1-6 = 7-12     13 is fake# ~, D5 U% `& n# `3 z; V& A

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& J2 \7 P, o% g( T9 Y/ IWeight the 2 time & Z& G) `0 O5 h3 ?3 Z- Y& B
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Suppose 1-6> 7-12' k! b9 l% ?9 [) S8 |* K

6 y6 V$ D6 E" }  m1 D1-3 vs 4-6
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! y; @- G% f; j* h. A  UThen Weight the Third
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1 d7 \* e- `  @4 V$ ?5 nSuppose 4-6 > 1-3
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Just like the first Step3 m1 U3 {* ]4 q2 K: Z1 R
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4 vs 5 . u+ s/ J8 u: R. p$ x: W! ?

& u; u! ?; g5 }, P- Tif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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4 y$ Q  }: e' Hand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
, D4 i! ^- i  X9 V; i( T2 ZGroup B: 5,6,7,8+ i: K; O- h! O. @% [' S# W+ b
Group C: 9,10,11,12
: w, p, P4 G+ e" ~: X& YGroup D: 139 T" I% _& ]' s* O& m* e+ b
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Round 11 m% i# E$ i6 @5 M* S1 c7 f
Group A vs Group B/ n; @, q: e: U' _, O( P9 g
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
3 [6 }, a9 `& \再在Group C拆成:
$ ~' m; ^' a0 }* y) MGroup Ca: 9,10- O0 x# r2 P; A' W; _2 W  R
Group Cb: 11,12
* Q3 X4 O+ Y, O- k8 |8 E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, ! Q9 ]7 q* p2 c  g# N  `8 v
要再秤, Round 3, 之後便知答案.6 Y; w0 I1 x' r5 }

4 }' A, J( i1 n0 X' ^" {2 be.g. #1 假設10為較輕的一粒
& I. y& [* Q2 \% J7 yRound 17 r& i& y1 S) e2 q* l# x/ V5 E
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
2 f9 |& ~- M; @; l8 n( n9,10 vs 11,12 = 9,10 < 11,12+ S; @/ P8 e/ p* @$ G
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Round 3" @& e/ N$ z% ^( }
9 vs 10 = 9 > 108 m4 C9 G! h, Z( [% @2 l  x/ X5 Q

& r5 p! c$ N# K" tThe answer is 10.
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8 G) J! E& r6 M+ ]% V! E8 j0 xe.g. #2 假設7為較輕的一粒1 O: P+ o0 b; I% j3 {$ k
Round 1+ x+ L' T. v, W1 R$ x6 ^. ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2) z3 \/ f- P* |, R
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
% K/ {7 l% J7 M5 Z3 G7 vs 8 = 7 < 8
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# _' _/ W- M1 }The answer is 7.
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" r; ^/ W: b1 d' m+ j' h6 q/ F; Be.g. #3 假設13為較輕的一粒
. {6 T* m: L7 h# X3 WRound 1
' c- [+ a1 s  N% l7 A4 N" A1 P1,2,3,4 vs 5,6,7,8 = equal! R% Q& l# v! I* V. }* w
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Round 2# \2 @( Q9 F( Q5 l9 q2 ^$ g
9,10 vs 11,12 = equal
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+ W+ q$ N, a( k* b" ?No Round 33 f( G2 V  B7 f+ G/ G* A

7 e: @+ J) _0 @6 T5 H4 SThe answer is 13.3 v7 t3 x9 ^: O# F2 W

: Y- ]1 ?/ _& L: Z1 [5 a唔知我答得正唔正確呢?! 3 i  `! G& u; p$ c8 d* ^
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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
$ a0 ~) j3 K; }! J. j! A7 ~9 L; wif 1-6 = 7-12     13 is fake
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if not 0 }( {$ K' |$ G0 v6 G6 l0 b6 i
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Weight the 2 time
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Suppose 1-6> 7-12+ i- w+ b. J& k7 O4 e. {

, x* d( z- ]% o1-3 vs 4-6
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% V  K, y( ^- lThen Weight the Third) j! ]; b3 e! k) B) @6 o
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Suppose 4-6 > 1-3" O% N1 f9 Q! n; Q/ x
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Just like the first Step
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1 W/ V8 z* w' c4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
, L  I8 z% |$ S4 H$ \and so on......................

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( Y8 {* N3 C* r+ r. y問題第二步; C- _$ T: Y, C
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Weight 1:  1-6> 7-12& K- ?# q. O- Q

) {5 L( t# \$ y  A- @1 OWeight 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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========================================3 _' N& g: I9 C9 W. n
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問題第三步/ l6 y2 q! C# b% |' m

/ q, [! D1 x5 {8 w/ A: }. f) RWeight 1:  1-6> 7-12/ f) Y4 N/ W  o3 y  _% p6 S2 Z8 K# n
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Weight 2:  4-6 > 1-3 ( e7 `. L: J" i4 E
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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