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)。
/ j& W( h9 p% j" P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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' O4 ?* x/ X/ C8 _, V6 ?7 k1 q注意: 1 A' A* ^4 _- Q- O) h3 |

0 n9 U' o) v. _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+ j! q+ d5 ~) f; y( X6 S+ }9 v
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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! }" c8 o3 n9 D- B1 a; o# u+ p
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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:
" Z/ r- B7 t: E7 }  a' q  P* S6 k3 u相信e條題目都有吾少人玩...

+ P5 m8 p4 I9 B2 F5 n# M; p我以前畫左個chart去答,
" y, J& X( V3 A7 c, Y& l# n- T等我搵下仲在吾在
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; x5 U; }* l" K$ g5 }1 u; r+ o+ K當日用左37分鐘答１２粒波子，差７分鐘才合格。- ^3 F9 B) u' Y" 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:/ [: g0 i1 p+ n) J  E; V/ @

# x# C. t2 @3 k6 H我以前畫左個chart去答,
  m$ u4 v( L: c8 [! I等我搵下...

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4 }: S5 n  b% r# M/ [+ ?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:
9 {9 p. b5 K% y9 |- z! q6 W9 @' \唔識隱藏...已經諗到..

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+ D( n; \, X: @2 isor !!!....e加改左
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2 v) B( C+ b% w) i2. 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3 _5 ^% L: f$ L8 T4 }; _
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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:' e8 Z* _" n( s' \
相信e條題目都有吾少人玩...

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) J- c* q' q: N# K" IPlayPlay, Let me know later who has the right answer and I will add points accordingly.4 n. Z* C) G, {: t. \, F+ g+ T# j

( a2 r" Y/ X9 {) A% J" zThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. `- N% s9 @- K* T% D. W: [
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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.
; W7 o8 ^7 S& L8 ~7 u% O1-6 vs 7-122 B3 P, {" K8 Z/ o6 y
if 1-6 = 7-12     13 is fake
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  c" @3 B* T' Z" x1 F3 M4 v. o# e# vif not
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Weight the 2 time
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" \- a( |1 Q6 R; ?: O1 {3 dSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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* O: Q" L, J" h" F; O6 f& s( lSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one 3 @9 k; A2 J; b  r% c& h0 F; U4 g

. P* F8 _$ U4 m/ Z  }if 4>5  4 is the fake one
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, x3 s5 X" _8 h% R2 land so on......................

hello1997

分3組4隻波子秤
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. ]2 M9 @; _% [! f( \8 e' i7 Z% WGroup A: 1,2,3,4
1 m4 F8 w! s6 y: `Group B: 5,6,7,86 {1 T: Q3 |, K" g- @
Group C: 9,10,11,12( d/ U+ Z( b& R; K
Group D: 130 A4 |4 O8 f0 n
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Round 1" J" s. o6 _5 C; D* D) B: j
Group A vs Group B* a% `. f4 ]8 [- B2 S, m" J
如A and B一樣, 即較輕一粒在Group C or D
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* [3 Q: Y2 u# a, iRound 22 m* ^0 I6 j! j6 q
再在Group C拆成:3 [( j# L% O# i  _/ O
Group Ca: 9,10
3 Y) I- E1 A# j7 {8 Z" P* w2 rGroup Cb: 11,125 b0 I% j4 r+ i$ R) p
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,
: k# D8 s2 {& t2 K5 w5 F0 A, ^要再秤, Round 3, 之後便知答案.9 i, u9 k2 ]/ v# k0 M% ~

, [) p! l( Z/ Ae.g. #1 假設10為較輕的一粒9 g# c8 l9 n. d8 S
Round 1
9 R' _7 _  J' j' U1,2,3,4 vs 5,6,7,8 = equal$ L& G/ b4 |6 i0 e1 D5 E1 J# G
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Round 2
/ i! l: O/ G) G! ?$ p6 w9,10 vs 11,12 = 9,10 < 11,128 j" m2 S# E% S3 V! }0 y0 }2 u2 Q
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Round 3
" b5 U6 J8 Y0 G! p# j- Z* Y9 vs 10 = 9 > 106 J) m/ \1 K3 |+ F% r" o9 |' r

- H. h# W7 G" ZThe answer is 10.2 P$ L" Z7 G  P7 [0 j# m
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e.g. #2 假設7為較輕的一粒9 u* A9 q, t  i2 C3 }: ^% }
Round 1
- g. @, x. o& z: S1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
6 \& {. M* M" l! x! e5,6 vs 7,8 = 5,6 > 7,8
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  o, y6 Z* x, oRound 31 N0 S1 B6 v3 W8 t. }0 ?8 ?$ P! Y
7 vs 8 = 7 < 8
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  g* u+ b/ q5 Y, g$ A0 |. i6 z6 M0 cThe answer is 7.
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# _- Z* x- x  v7 je.g. #3 假設13為較輕的一粒
) u1 v; e9 v' }Round 1' O0 ^/ u" b9 ~. B. z. ~- W4 s
1,2,3,4 vs 5,6,7,8 = equal( B" D2 M0 u4 ]9 U' y
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Round 2* X& Q8 Q9 m5 d5 E/ g
9,10 vs 11,12 = equal
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No Round 3
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# f. C0 K! [( `6 ]  n9 F' KThe answer is 13.  B2 S3 Q3 m: f+ D0 M; L- p
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唔知我答得正唔正確呢?! 8 v* m  ]0 b" u. ^

" o7 l# Y( G3 a! l1 _4 T[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:( O0 |& b; T9 P, G+ G5 o
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1-6 vs 7-12* X# A6 S' A6 h9 y9 S: h6 O0 H
if 1-6 = 7-12     13 is fake% P5 ^# R4 c0 K& T8 R! Y9 Z
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if not
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% H" M: d3 T9 }4 Z8 a+ jWeight the 2 time
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( x+ G& Z/ ~' E1 z& T. F2 SSuppose 1-6> 7-12
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- o. k6 t7 Y# y9 ^0 Z1-3 vs 4-6
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+ u: \  P2 H9 R, e/ \) W1 WThen Weight the Third( ?, p3 N- f) C, e$ R2 ~! R
3.
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$ {0 O; D4 W8 t8 U, MSuppose 4-6 > 1-35 h9 _7 S( }# O

# Y5 k4 y1 d% pJust like the first Step4 g" e% `7 n4 k4 ^, ~/ U
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4 vs 5
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1 J8 @% G- u9 Qif 4=5 6 is the fake one
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% f  I' ?( g3 O4 ^  m5 Qif 4>5  4 is the fake one
" S5 P! w% V' [- Q5 R+ e% hand so on......................

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. F% J9 f7 U, k# P問題第二步$ j# ^% i. C' u- K$ S$ n3 M

" k+ t0 D- o8 @4 c2 J% pWeight 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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0 s7 U% H. W8 E: G6 d  \' A2 i你第三步点去搵 7-12 边一粒???
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========================================
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: T7 b% i0 d6 z& r5 Z( g2 I問題第三步& T* q' K2 ^$ ~, N( r! n1 N8 z

- J% _, H; U! B8 @3 rWeight 1:  1-6> 7-12
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' H2 B$ K& a, N* \, G+ HWeight 2:  4-6 > 1-3 6 @! \) o7 _7 O" `* B

$ R: v/ O. g/ w# T1 W* J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