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( f% s4 L: R『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)。
/ f) [; o. ~5 E% Q2 c, B$ c4 U$ g3 V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？』5 p- @1 G# ~4 _! _; q4 x  X
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注意: 5 I' E9 n8 p! W9 M/ E2 T

3 C( B$ H/ I6 t/ j1 `7 n' I1. 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9 z- x9 J: f& |, V6 T; G3 W
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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& P* h: l' C3 l% ]. 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:
' E% `, B9 j! r% `# G/ m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,/ j( p+ g: L5 s% [7 u
等我搵下仲在吾在) w: V& \3 A( |) [, l

6 u% _7 D" s" F, D當日用左37分鐘答１２粒波子，差７分鐘才合格。
2 `" _/ f& S. k! `13.........' Q# K4 D8 p' ~& M, u; S9 }

1 K, U9 D: L% a" {8 W- l5 L% _# L- J[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:( }1 q$ J1 ~! J9 u* \' W+ x. e

( `( j  `/ D% y我以前畫左個chart去答," r5 K. D0 l/ F) W- l
等我搵下...

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8 P5 c! Z4 L: S5 r/ Y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:
" ]1 n; _/ b! F) M4 G$ L4 B唔識隱藏...已經諗到..

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sor !!!....e加改左
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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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: p3 i5 M2 S6 U: N# x; [$ V6 f  t[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
( P: b) c4 J% v5 a, v* t. x# d( x, U相信e條題目都有吾少人玩...

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% s/ j$ H- _- \% v( Y* aPlayPlay, Let me know later who has the right answer and I will add points accordingly.; F  W" B% B" c6 R! r8 Y; [  L& c& G
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:5 B7 e& u* v9 r' z& D6 {
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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+ m9 L- u+ J; a, n$ ]: NThanks

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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.
2 S: e6 L$ c; Y1-6 vs 7-125 E: w* J' T- J. N8 @: }% F
if 1-6 = 7-12     13 is fake
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: w4 b; I' O6 a) S# Zif not
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Weight the 2 time
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$ O8 X  A+ j& y- E0 uSuppose 1-6> 7-12
1 a: t. D, S' q, `! O: B5 H
# R5 H% P1 v9 K1-3 vs 4-6
  D# e: i. W+ K: u
! \% p1 h& \3 PThen Weight the Third' T% Y6 j. P- b- j
3., L: U% x' W& E' @/ \) Y
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Suppose 4-6 > 1-33 [1 d, O; D, ~, z* Y4 d! B

& ^* p  m* K; Y3 G4 p9 _7 BJust like the first Step3 `2 q) ^3 r! N  t" y- s
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4 vs 5 4 L7 ~8 ?- n' q8 b

: [3 `9 _* b4 R% m, o* h% yif 4=5 6 is the fake one + i$ ]; ]* V; Y/ b
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if 4>5  4 is the fake one % L. M* R& _& L& u4 L7 G

$ Z5 V: Z6 S. s' Fand so on......................

hello1997

分3組4隻波子秤/ W* f+ _3 M( K0 Z
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Group A: 1,2,3,4, N: q0 R5 p1 _
Group B: 5,6,7,8& N: `4 J) H/ q0 V4 d
Group C: 9,10,11,12
, K& F- }! t- b; OGroup D: 13! x: e. j/ V" z6 U8 M
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Round 1& @6 m5 p. u' [! p" r+ |6 H
Group A vs Group B, |( `8 r7 B- c( @9 R$ K! A' |
如A and B一樣, 即較輕一粒在Group C or D
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Round 23 I* _+ K* p& \2 \, ]
再在Group C拆成:2 Q% S& |; @( X* D: o4 w' a
Group Ca: 9,10) W* T$ B3 _6 @7 R" [
Group Cb: 11,12, F- ?) K, S% c0 l4 t! E  N8 |/ o' S$ C
然後再秤, 如一樣, 即13為較輕一粒.  i. o3 g+ K: x9 C3 s
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如不同, 即較輕一組有一粒較輕波子在其中, ; h, ]! A' L6 L: P; r
要再秤, Round 3, 之後便知答案.4 {5 c! H/ s( [9 p% r% z

" J" m, @% U- h/ m. k$ je.g. #1 假設10為較輕的一粒' H" i3 Q. U( S, Q' d2 V- i
Round 1. P8 F7 X# s' B: ^0 y0 B9 K
1,2,3,4 vs 5,6,7,8 = equal9 B) I$ O0 {% j3 \' {5 `! H# J3 s

$ G1 d% u/ W8 p4 Y4 k! ?$ O$ _0 PRound 26 w" d" V* E6 l+ m% B7 N
9,10 vs 11,12 = 9,10 < 11,12! O0 n. o/ E3 H

+ n1 V% V4 T( z5 rRound 33 e% ~6 u9 H' B) n4 g, Y1 \" O
9 vs 10 = 9 > 10
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The answer is 10.9 {. F' p& z$ H3 Z

6 n9 L& L* |7 }; ]6 m4 \e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ A/ M( ~* ^# F4 J1 n5 ~& |! s9 T
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Round 29 s: ~( s4 U  R8 L: @
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
8 F0 t# _8 D. P. R* q2 q/ K7 vs 8 = 7 < 83 `9 \. Z# u4 v; B

+ M. l4 H/ V: g& F0 YThe answer is 7.
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) P* C/ i; I( [+ J4 l) v" a3 [7 Ne.g. #3 假設13為較輕的一粒
" @1 _+ o$ Q, b6 {6 R' NRound 1% j5 w: [% P& [* F
1,2,3,4 vs 5,6,7,8 = equal2 S' Y% K& y- @; @# A

; Q: i, `/ ^8 F% GRound 20 D( K7 Z- y8 e& n: f# W# W0 B# i
9,10 vs 11,12 = equal" y$ R+ N& K% f' K6 v! q

6 k# X; P/ C" i4 g9 iNo Round 3& y' o: W  }. Z2 E
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The answer is 13.. k+ Z, Y! A- g6 m) P& H

, f2 b* S: b% S2 k. X0 H唔知我答得正唔正確呢?! 3 ~6 T; ?& j+ c$ Y

$ @1 C  v6 q" {& j  c[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:+ o3 E  p& e& s3 S- y
1.
$ g3 a/ d- `( d) h4 ^" N1-6 vs 7-12
( k1 D7 p, U3 z% x  J0 h* _6 fif 1-6 = 7-12     13 is fake1 l7 p1 t' K- t6 x. E  V+ l
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if not
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 $ B# ^, @+ v6 q1 G' r1 L% i4 E  y
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Then Weight the Third
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* m' {1 x& n/ a/ R3 k- v1 w5 VSuppose 4-6 > 1-3" E' I( x# M+ U5 C* h' |

9 \" ~5 p% r; c6 E+ t2 M) ]# UJust like the first Step3 Y& H/ \" X; c1 F8 V* R
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if 4=5 6 is the fake one
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$ K* I% K& N( {* y' R, P% lif 4>5  4 is the fake one
0 U8 Y# j4 F( Y  n% W4 Yand so on......................

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2 y/ Y+ f; }( J, G/ |! G! e& _) K3 O問題第二步( _( E5 h- L2 M/ A( s; x9 G4 ?( n

2 T; E4 L$ V0 t- jWeight 1:  1-6> 7-12
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Weight 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 U6 W  I1 [& I# ^$ O========================================: B: v# ?5 g# X) k' ~
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問題第三步
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2 _# ?. {8 M9 C( O+ A- J! R6 KWeight 1:  1-6> 7-12% H  y' U2 j. A  P7 o7 K/ }
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Weight 2:  4-6 > 1-3 ( g$ S$ X* H3 M2 B1 j+ P* K* D

9 m2 k, k: g8 m2 ]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