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/ e# L" P8 i9 s" w4 c" }9 l

0 L7 \# d( x% v+ L$ T; 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)。
6 U/ w8 }8 V4 E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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* w9 `$ `  I1 d. Y7 V( b注意: / N2 S# Y/ Z5 |$ |2 t+ `
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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
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( I  Z& f# D8 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  , hide 字要連埋 , 內容 = 答案
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% i' ^  K9 r  B6 I; A[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 C+ G+ x7 m+ k8 D, E( \( p/ e& z" @
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,: t3 q$ R! h0 [  Q7 S9 t7 f+ _
等我搵下仲在吾在
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7 }9 ?4 N) [1 U/ n! \5 d% @當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 o; w5 V4 D% j# a; N3 w6 ]13.........2 T- F# N! T+ h+ x1 T) c# @* S0 i
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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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) ~: W& x5 T- W4 V" @我以前畫左個chart去答,7 T9 P9 W5 y/ e, @& f4 E; B5 V2 x
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:3 V+ r2 s( k$ S2 e* S/ U/ C
唔識隱藏...已經諗到..

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4 e7 E  b  s- n! x) K- ^  hsor !!!....e加改左4 E* r( w# m/ v' `6 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
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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:
9 g8 t& l1 d; t. k6 N( I8 m1 j& r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.8 k7 m) f- C, g# E) m$ N
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ c; M' x) o9 Q! b! }
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! O3 m+ E. T& F" @' p& X3 HPlayPlay, Let me know later who has the right answer and I will add points accordingly.. A, x8 ]& _" l' h
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Thanks

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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.
: ~4 h: N1 O+ B1-6 vs 7-12
/ [3 q, m9 K) s% \$ x- ]2 oif 1-6 = 7-12     13 is fake( v* L6 c$ a: e- r, E0 f
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if not
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, g; ~8 B+ C- @4 D5 |5 {6 [  EWeight the 2 time
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Suppose 1-6> 7-12/ B- `$ O5 @) z
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1-3 vs 4-6
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7 L/ s% `$ I7 N7 c/ y: I. n" ?* JThen Weight the Third( j5 ~$ A4 K+ j& j/ c4 m
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. ]7 {4 M1 ?6 \4 J0 e! sSuppose 4-6 > 1-3
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8 G# {* x/ Y5 |) WJust like the first Step
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4 vs 5 1 {+ M8 v6 @* A; P

/ K% [. F( [. a( e0 }if 4=5 6 is the fake one / D; x+ d! ]' x
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if 4>5  4 is the fake one + T( x4 y* h9 k. W* |) U2 F

, v7 Z( y7 P% j7 V/ n$ U' qand so on......................

hello1997

分3組4隻波子秤3 R: c# }* X: u; J7 @0 n" j

* ]# M* [, h) G% }8 {1 pGroup A: 1,2,3,4) t( n6 c9 n. J, Y. q+ g+ q. i
Group B: 5,6,7,86 r/ X1 w2 y1 z1 }/ k
Group C: 9,10,11,12% n' T, `$ m; n$ g0 M
Group D: 13
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Round 1/ N% J5 ?3 i& d! L% ^
Group A vs Group B( D0 L6 S% \! q) C
如A and B一樣, 即較輕一粒在Group C or D
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Round 2  `& c5 r* B5 Q! O1 [' D
再在Group C拆成:
3 p0 T- s, b9 H. |. mGroup Ca: 9,10' M: A9 T6 i5 j, d5 i
Group Cb: 11,121 l2 \& m! a  p" U3 f9 ]4 H7 E: u
然後再秤, 如一樣, 即13為較輕一粒., F5 s% k  X- y3 ]- x7 E" P6 w( R: B: a/ p

0 E4 D( j  n. q5 c# R1 L; A如不同, 即較輕一組有一粒較輕波子在其中, 5 M0 {2 i( Y8 @
要再秤, Round 3, 之後便知答案.9 L) H9 u( d' ?/ _0 N8 _3 o

" A- B0 V8 e& ]1 I2 N8 te.g. #1 假設10為較輕的一粒
- ]6 T: ^7 K( I3 v$ \Round 1
2 `* V6 ^5 d* K: C1,2,3,4 vs 5,6,7,8 = equal
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% Z6 S7 ?1 Q) g+ `) rRound 2% [8 c' g; x* d- a; P$ S0 J
9,10 vs 11,12 = 9,10 < 11,12* a! E' H8 E0 ~

+ B; M5 x4 j; N& d$ o9 BRound 3
, y: f2 y8 ?0 h9 vs 10 = 9 > 105 t+ b! W* ~3 w0 T) F3 R" \" `

% v5 s, R) ?* X  e4 j5 @) M1 oThe answer is 10.- l$ i0 n% O% k+ ]% H

: O1 k  F6 b" N2 h; Ne.g. #2 假設7為較輕的一粒
+ k( V( C1 g% S% uRound 1; |# ~- N3 ~/ E4 M; o
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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7 m2 ~3 e' y. t5 `" V5,6 vs 7,8 = 5,6 > 7,8
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Round 3
8 w. A3 b# t3 L. }7 vs 8 = 7 < 8
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: B* N7 ]1 r# E+ ]The answer is 7.7 I9 E4 M  b" m. G! n$ E) ]! t4 O- f# ]; a

, `1 e# T/ e6 Ce.g. #3 假設13為較輕的一粒3 W) P; v! w2 c; T* t  U
Round 1
& H( u& b% H! C, j! {. D1 T1,2,3,4 vs 5,6,7,8 = equal( R! d: I8 A. i" E9 Z1 r! B

5 h  l/ a8 @: F( Z/ d: X3 ^' uRound 25 }5 ?, {; {5 Q7 v+ N; U2 F
9,10 vs 11,12 = equal+ V6 A& G( x6 x2 |

0 @1 b+ E1 c% |, e  }No Round 3
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/ a0 T' L! y* f# @# V$ ?) fThe answer is 13.
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唔知我答得正唔正確呢?!
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* A' ~7 V, Z/ [% X/ }9 @+ ^' q[ 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 c4 Z4 u9 Y$ Z3 N
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1-6 vs 7-12
% q$ U6 v! b! `! B3 b5 mif 1-6 = 7-12     13 is fake
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9 g+ p! Q7 D9 oif not . z) U0 M$ s) r$ u

- z# a) E% Y  A$ o5 qWeight the 2 time . X( O0 x0 T2 G- r/ U+ U
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Suppose 1-6> 7-12; v7 o1 u; ?2 ?* P' b' B
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3* G; i9 Z# R0 c
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Just like the first Step8 w* {$ h7 F% Z  \
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4 vs 5
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if 4=5 6 is the fake one ! X8 h: l% X1 {; Y, S9 S) l

' c8 Q) o' Q0 G3 H; T0 n* |6 pif 4>5  4 is the fake one
# r# j; J1 s; J. rand so on......................

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問題第二步% `4 c3 B1 r+ C* q1 a

' Y5 {% s0 o: L7 y4 p! W  |, }Weight 1:  1-6> 7-12, z& \2 D! y1 W& t# P- X' \, ?" g! i8 i: ~

0 P) k" ]- b1 `& S. j2 P- z3 RWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& c+ B4 K7 @; F' j" I5 ]4 o9 \; @
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你第三步点去搵 7-12 边一粒???
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7 a7 `9 W2 \( `6 t" h7 n. Z$ P========================================4 l/ K* H) N' F8 S8 A: g' u
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問題第三步1 e* q& A1 L$ P$ J
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Weight 1:  1-6> 7-12, t1 f, O# |4 W* n6 a

' u* Y# j8 ?0 T# j4 LWeight 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