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9 u# d6 ?/ J7 N7 j

- w( k8 q/ T& A. W* K: T『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)。) L4 S7 M+ |. d( ]5 L$ e1 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？』
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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
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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/ w) w5 V% D( i  `- m
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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:
, R6 P: \1 {% h3 s! N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,
( b4 [3 T' u# {" H$ n, v等我搵下仲在吾在* J2 T; C8 h  D4 i3 ^
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當日用左37分鐘答１２粒波子，差７分鐘才合格。9 `" y' `4 F/ A2 t2 r& S9 ?7 T
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:. x; p6 W0 J6 l

, F$ z0 E4 R' r5 u我以前畫左個chart去答,
0 k- ]4 A3 J3 C( x等我搵下...

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0 ~! H+ Y8 }  a) {% `$ Z* p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:
( E- G( l" q+ J8 Q唔識隱藏...已經諗到..

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sor !!!....e加改左, R; B; k# {2 u) d, T' l7 i

* }' P5 x* t: i" f" a; ~7 |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:% a  |! Y% q, x* O9 g
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.: S8 E3 W$ Z7 F( V0 |0 A
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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+ d. W6 ?  d% m) M8 {: _PlayPlay, Let me know later who has the right answer and I will add points accordingly., @+ Q' l( @) p( j+ F$ Y( W% i
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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.
5 x- y8 \6 A3 ^/ v0 Z) t1-6 vs 7-127 A& d# s% B+ ^' s
if 1-6 = 7-12     13 is fake4 f- b# I2 J/ e  F

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4 `; S! Z0 O) uWeight the 2 time 5 ^1 i( R3 {. X' R; S

2 f7 w, P' h8 DSuppose 1-6> 7-122 O, R3 Y$ c* g
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1-3 vs 4-6 & x/ z+ i# T( q0 Z8 R1 H# a$ R
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Then Weight the Third. @) D7 W" ~" ~6 ~/ w
3.
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! E& O4 J% R, j: l! aSuppose 4-6 > 1-3- r& D  Y2 ~$ S
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Just like the first Step
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4 vs 5
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! H, Z/ p+ z2 F- c& ]6 Y+ uif 4=5 6 is the fake one 6 c: y9 T9 X! ?: T( r9 P4 A% f; {. O4 f
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if 4>5  4 is the fake one 6 j4 I+ ^! E  Y6 W9 g
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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% [2 r& l/ L8 O  }
Group B: 5,6,7,86 w# C0 l( \: G" a. {
Group C: 9,10,11,12
! o; _) m& \8 IGroup D: 13. O- q0 h# h6 |% I# R, U' E4 X' Q
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Round 1
( C5 S8 ~" c) L# e( S3 R1 nGroup A vs Group B
' g  D& o4 V/ r# |, s如A and B一樣, 即較輕一粒在Group C or D* z9 u5 }, l! c( f, i' f! l
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Round 2
+ N" _+ e* z5 N4 g再在Group C拆成:5 J% [# ]/ U9 o  P% \" e- _2 [
Group Ca: 9,10
* L; x, m3 l9 ~. l4 Y3 {& SGroup Cb: 11,12( f5 @$ Z& e; U. Y+ N1 [4 l; T
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,
( G0 `7 ^9 D: J4 V: y要再秤, Round 3, 之後便知答案.0 ~8 P& ]+ T# h1 i$ e
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e.g. #1 假設10為較輕的一粒
% X$ O. @7 h0 ?' X, ]) pRound 1% V  N9 p" t+ N! j0 _1 c
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
, A0 `% w7 D. N  V9,10 vs 11,12 = 9,10 < 11,12+ m. |. w7 g- j/ D
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Round 3
  C+ D; O9 m5 T5 ^9 vs 10 = 9 > 10& I0 K+ _5 `* u, x; ^
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The answer is 10.  M% l* U5 q' V. I9 O" D+ e

; C+ K7 w( g  Re.g. #2 假設7為較輕的一粒6 D* U2 f' r" F' Z& }& j
Round 13 o7 |1 f# b$ _1 ?2 F
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# ~: d8 z, [. B) ?. [
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Round 2
( N) Q( K( N5 Z# K6 G5,6 vs 7,8 = 5,6 > 7,87 e' m1 M0 p8 Y7 `" v
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Round 3$ x* P( S9 A0 L
7 vs 8 = 7 < 8" ]( Z) i+ T1 b" D. T2 z7 A) }
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The answer is 7.' ]9 X# ]( }0 I+ Z' V  D

9 A- z5 f$ \8 D- ?/ K: Pe.g. #3 假設13為較輕的一粒! i1 D% x6 H. [4 @
Round 1
2 `) a  s% X4 A: v9 c1,2,3,4 vs 5,6,7,8 = equal( z6 r. H( g  M3 J

6 M: F: f6 A2 X* k* X, f3 q, IRound 2
& M; h5 c4 W6 @9,10 vs 11,12 = equal" m2 h- T. ^' Z' h

, m) w1 l3 F2 s: e, n& m* Z, p* bNo Round 3* n) _$ a- [  G" Y" `8 z7 [4 g9 p

; x+ c) i% `; g2 b3 f# Q7 MThe answer is 13.
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. c3 N: c; m+ X5 P0 m唔知我答得正唔正確呢?! , S. z3 |- J, k' q: {8 T

; |% [) s" I$ b' P2 z# K) g[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:' P+ S, E+ R7 V: D/ `" A
1.
! O8 k6 L9 `) F; I7 S1-6 vs 7-121 W! P; ?' O) V* r
if 1-6 = 7-12     13 is fake
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3 H4 M7 j- x+ v' P; F/ Sif not
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Weight the 2 time " W" S5 x6 m& P/ y4 O

5 z  n4 h9 L: L% Z  b3 TSuppose 1-6> 7-12
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1 F1 }5 ?, J5 I+ @; N  B1-3 vs 4-6 . ~, f7 L. q+ i, E! D
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Then Weight the Third/ z5 r, A0 Q' a( s
3.
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; ?, j' e, }0 J- oSuppose 4-6 > 1-3! H1 V+ I# X. F/ H3 Y

7 o! i5 S5 X# n" i+ K4 T) ^6 h! }: CJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one 4 f) U0 X: Y2 b% w" c/ B1 o
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if 4>5  4 is the fake one
9 b' F+ l1 E9 ], @and so on......................

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9 T1 M5 {; ~; G* z1 L- k問題第二步
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Weight 1:  1-6> 7-12: Q- J5 T# v9 Y0 V- L

- k1 r- E2 a4 U& I# t  LWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ i( `# \8 \. b* z你第三步点去搵 7-12 边一粒???7 q9 t! B. a9 X" H
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========================================
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0 c7 ]4 j: E( ~# d+ _0 |9 Q問題第三步
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& x& F% I9 b- a8 A5 z% [9 g" SWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 ' Q, v/ f% X: N) A9 B3 I5 m
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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