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7 m( F4 U7 e7 Q' L1 t% h/ N

6 ?9 n) B# j& W0 u+ f9 v# 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)。% r" r$ b5 S, d! }" L/ a
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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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2 n. y5 ?$ ~1 F: a3 e) {7 Z( p
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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% _  e6 v( n$ a" g. f9 u, d
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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:
% T% k, G' l4 W5 ]+ {; S5 h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,: f* D$ e% K9 G/ k/ D
等我搵下仲在吾在; T/ R2 G5 W4 S; G! w

' w8 }6 T- n0 G" q* t當日用左37分鐘答１２粒波子，差７分鐘才合格。
# M1 a7 f2 t2 K( d& T13.........
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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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+ n8 }) X! P, C我以前畫左個chart去答,
/ L6 j7 `/ W8 \  c' j- t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:- q2 K8 _9 I6 _: Z0 c7 b8 {
唔識隱藏...已經諗到..

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sor !!!....e加改左" R. E7 z' g8 @! t# s5 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* C2 L2 J+ ?5 z. j0 D2 X; m
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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:- K$ R) Q1 _; H
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.% L6 q$ @2 K; i- G& v- V

7 K$ i' D1 S& P9 A! J0 NThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:3 o/ i6 {# A; M6 O  ?) g
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  }8 F' v2 D$ C! C( ]! q2 |PlayPlay, Let me know later who has the right answer and I will add points accordingly.: f2 H. Z$ T( J2 i) u9 K
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Thanks

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& T) t# s( u) K! R. D不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
4 J' t2 C6 y7 g/ X5 W+ A; K1-6 vs 7-12
, d  q7 _9 a2 i; w% J/ w3 Gif 1-6 = 7-12     13 is fake
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Weight the 2 time
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  @4 Z* P% j0 {' SSuppose 1-6> 7-12- U4 \. S; K% N* J1 W
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1-3 vs 4-6
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Then Weight the Third
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. r8 ]5 K! ^8 LSuppose 4-6 > 1-3
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Just like the first Step; [4 }" ]+ X/ E# p9 |; g

) z- z! J: v2 I: w5 ]4 vs 5
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, n9 u8 ~3 Z1 ~) T5 i$ y) O$ [if 4=5 6 is the fake one & b) e1 l- S5 g# {: m( Q

1 F# W/ j- r& _* vif 4>5  4 is the fake one
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# m$ R) V; T, d  Cand so on......................

hello1997

分3組4隻波子秤
5 r1 [( ?+ \7 `5 v% F' W) _- e
5 k8 c7 b) I4 [( HGroup A: 1,2,3,4
9 k, z  o8 Q+ M4 M4 a3 PGroup B: 5,6,7,8
! G  t' V- X. {6 c; C) q- ZGroup C: 9,10,11,124 h  d( a/ S. T- Z6 ~; M. F; o
Group D: 13
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* y  q7 ^7 h5 b: TRound 1" W( ^: [1 d) N
Group A vs Group B
6 {/ x5 C9 m# s, d8 M# W; o如A and B一樣, 即較輕一粒在Group C or D' t2 j0 o) y- q6 B. z- I

: R2 m) Q2 K/ T4 I! aRound 2
7 K* c8 D1 X; a2 b( E, u- a再在Group C拆成:0 g& b; r+ u9 k
Group Ca: 9,102 u' u0 V, Z7 M& q
Group Cb: 11,12
9 P; r8 j8 b8 h; g! P8 z' z, s2 S然後再秤, 如一樣, 即13為較輕一粒.
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4 z( g( N# W+ N" J2 e$ G如不同, 即較輕一組有一粒較輕波子在其中, 8 u/ j2 h0 J- H( A7 y, }" D
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
% {( `9 S- g1 }' o* ~" ZRound 1
2 g! v* p9 g: O1,2,3,4 vs 5,6,7,8 = equal& K  O4 C; k. y( u$ y, l- N# W
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Round 2. f& L2 _9 W* a% k  w; I! G
9,10 vs 11,12 = 9,10 < 11,124 \# E3 q& K( P. R3 }- N; H4 F
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Round 3
# B9 w+ O! b8 t' i$ X5 j6 k- V& U9 vs 10 = 9 > 108 E. H! M6 C% U. Z
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The answer is 10.  b6 i7 n9 E3 B& H' |, b# V
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e.g. #2 假設7為較輕的一粒
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. A8 ]# Z2 Z4 ^* {' {* i0 F1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8- J; A( O2 a2 G, c
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Round 21 _( J* f( }5 ]& _: V" v
5,6 vs 7,8 = 5,6 > 7,88 v2 }1 r' q! m! l; q: ?# F
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Round 3
# ]; d$ b" [) l! W1 I7 vs 8 = 7 < 8
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! Y* @. @% u( S8 ~& d4 n1 RThe answer is 7.% P* ?! G8 p; M
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e.g. #3 假設13為較輕的一粒. W9 v' C: d+ Z( p3 i/ }/ R
Round 1
6 G% a, Y& ^" t; S$ B1,2,3,4 vs 5,6,7,8 = equal
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Round 2
) ]' g1 d( w) [  D# t9,10 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?! / D* |/ L. P! @4 v; K0 |! E
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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( r. s; D: D$ ?5 ]: j3 e
if 1-6 = 7-12     13 is fake
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/ q; }9 h4 F: m: bWeight the 2 time
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5 ~% ?, G: Q% o/ j2 \- W* LSuppose 1-6> 7-121 K' l$ S: E' K4 z( G" w& D. m9 D
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1-3 vs 4-6 3 [0 Z0 G; K! ]5 s

) r9 j! ]$ ]6 HThen Weight the Third7 ?3 _) l' a. k8 h. ~$ m- K
3.' ]. `2 h* M1 g

. e7 @# I9 T3 P: oSuppose 4-6 > 1-3% x+ c" N3 f8 ^5 e

, z' G2 x  |# n7 Y% y: rJust like the first Step6 i$ d  x: w: r& y9 O: l
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4 vs 5 + R4 D$ z1 O9 V. d$ u" @5 G
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if 4=5 6 is the fake one 1 w; |. f# Q8 R+ C

9 y5 ?5 t5 Z3 N( r  Lif 4>5  4 is the fake one
( `" y8 [, b* X+ h0 |3 t5 Z' t: m( ?and so on......................

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& |7 i7 l  [, R+ k" v  n問題第二步( J4 ]7 k3 ?$ q; {- A7 P4 X

5 y! J/ I0 k6 K7 h& DWeight 1:  1-6> 7-12
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- f" |! O: u$ ~. f+ z, OWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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7 O+ M) M5 p5 o% \你第三步点去搵 7-12 边一粒???
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========================================
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1 j8 h, a5 R0 p6 D( b問題第三步5 ]9 R4 r; ^, Z. K: t5 I

" s5 @4 [" L( V# g2 HWeight 1:  1-6> 7-12
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. u0 R/ L% x8 n4 n, ]( ~+ TWeight 2:  4-6 > 1-3
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5 t2 \# g( Q+ I# z: B* ~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