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4 A4 k0 f, @% r

- g; A& f+ }. B5 }『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)。, z) k7 [# \1 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？』! X* e6 w0 f" y5 p2 `
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注意: / M5 `; K5 G! m( R

% A& K/ w+ O+ E8 e' G8 j& O1 T; T1. 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7 z1 ?/ B% f  d0 |
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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:& k! m5 U$ w1 Q; w- S
相信e條題目都有吾少人玩...

" D2 R* e( S# I- Q, T" {0 @我以前畫左個chart去答,- B% }" m2 ?. V  i0 K* y
等我搵下仲在吾在
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8 a7 o6 d5 M3 E" M) m2 q5 R當日用左37分鐘答１２粒波子，差７分鐘才合格。; y6 A8 A% H/ x4 z1 v
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:
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我以前畫左個chart去答,0 c# s) I  _* A& C
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:
" U1 D) J1 h* T" Y+ G唔識隱藏...已經諗到..

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  V  f! T7 q" P9 n6 e( D4 Z) lsor !!!....e加改左( t. ~2 R/ i( E; F

# {& Z! u. X- E5 C7 \9 \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/ N( n+ L+ m, U6 m8 Q
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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:5 D* d$ p! |9 B4 |) i: w; W
相信e條題目都有吾少人玩...

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' ?8 H' _. @2 q: zPlayPlay, Let me know later who has the right answer and I will add points accordingly.. R/ ~# d  ?/ z1 c

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 R7 I* n/ {, }/ z% a
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.2 J# ]3 j: ]: D/ _$ G  p1 n) h

3 o% u- e0 p! ?! a* ^# e1 qThanks

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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.
& p8 y# M) Z9 t, b+ F  V1-6 vs 7-12
0 C6 p* q' @& j! G0 ?if 1-6 = 7-12     13 is fake- T2 m# q' F1 A" J2 Z

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Weight the 2 time
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Suppose 1-6> 7-12! v: e2 Q( s0 V, i( b; V7 p- t
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1-3 vs 4-6
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Then Weight the Third! g& J1 \% e; ?1 y
3.
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8 Z4 F3 @" h- F2 c: w5 mSuppose 4-6 > 1-3) ]1 B; K4 q( |" N- x
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Just like the first Step
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& l' @3 e2 z  h6 }5 j: U4 vs 5
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if 4=5 6 is the fake one
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1 q+ d" U$ y8 b9 D. pif 4>5  4 is the fake one ! d3 @0 k' l" |5 y2 R# u& b) w
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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
) u% u2 H. s; h+ V# y% m/ kGroup B: 5,6,7,8* D2 A/ X( r' ^9 W
Group C: 9,10,11,12" O) n' U& S0 s5 \* o
Group D: 13. m2 P/ Y3 s& u2 o: [! m- g) K
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Round 1% L; {/ k6 r7 B  x% n6 x: l( ^
Group A vs Group B
2 M  {, r9 d% p, f, }! c如A and B一樣, 即較輕一粒在Group C or D
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2 L1 c0 `$ P0 c7 L3 |Round 2
% T1 E0 c- j$ v7 ^再在Group C拆成:2 z8 ?* v4 m$ s* u
Group Ca: 9,101 ?! K8 T# M% G1 \* u7 O* N
Group Cb: 11,12
: ^0 ]) O% s# q8 t9 {! H2 w5 s然後再秤, 如一樣, 即13為較輕一粒.
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/ V. s* E/ j  X/ L, C5 _# R如不同, 即較輕一組有一粒較輕波子在其中,
0 @7 d/ f% D2 {; P' ?% {要再秤, Round 3, 之後便知答案.
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+ S3 w$ I: K% J$ }) z2 Me.g. #1 假設10為較輕的一粒
7 d/ N9 l# F) C7 A( ZRound 1
  H1 L( T2 Z: ~1,2,3,4 vs 5,6,7,8 = equal
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Round 20 e& ?9 L# P( @- V  r( f5 B
9,10 vs 11,12 = 9,10 < 11,12
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" n* k9 g% X/ pRound 33 r/ M2 f7 c: n9 v# F
9 vs 10 = 9 > 10) Y" X+ Q* g# o" o1 Q

  ?) l9 s4 a% k% i, T/ J, t2 xThe answer is 10.
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# R( ]8 B4 y! P, fe.g. #2 假設7為較輕的一粒; W1 U% z! ~7 d" Z
Round 1  E3 M8 R3 K# R5 e' d
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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  I  Q( o. \  K- GRound 27 d5 `5 t2 w  K! S) g
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
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The answer is 7.. J' N  A* E' I3 u( b
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e.g. #3 假設13為較輕的一粒' |. j; g$ u5 z
Round 11 r4 |8 r8 b; P+ ?6 z5 B
1,2,3,4 vs 5,6,7,8 = equal
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/ I" O: \8 t" kRound 25 Y5 J- e6 y/ W) N+ Z; ]% f
9,10 vs 11,12 = equal1 F- T. F( z$ \/ m
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No Round 38 {. K- E- ^3 q' Z/ i4 @

% ~, m! ~! T, y6 z8 J/ G: MThe answer is 13.
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唔知我答得正唔正確呢?! / }) Q3 T% X( e9 [/ p4 S
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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:
7 A# T( V, ^! t6 u6 C1.
* b0 @1 M) o0 d% e1-6 vs 7-12
% v, E! l% v0 a5 A( Y6 c: a" t3 xif 1-6 = 7-12     13 is fake" @' F* L+ h4 R. ]% J' D- P
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if not
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Weight the 2 time
, R( ~8 g2 h- R- u. G. d% I2 J) I$ H! g, s% l) w2 ]! Z
Suppose 1-6> 7-12
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& v) O0 {0 O* P; U1-3 vs 4-6
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4 e1 `. @; e6 @& S( _6 RThen Weight the Third4 E, C- y! J3 I4 }% i
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Suppose 4-6 > 1-3% v. f9 o" h* N4 Y

& {/ H' Q0 Q  n& sJust like the first Step
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; \$ F8 i, E6 E* ~! `( c' `. m: a1 v4 vs 5
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if 4=5 6 is the fake one
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' _+ ?! t, ?& H4 m* E% [if 4>5  4 is the fake one / s) p' C  p$ d3 D
and so on......................

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問題第二步
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Weight 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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========================================
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% J' @* N* F0 Q! j, q問題第三步
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Weight 1:  1-6> 7-12
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1 ~5 _) d* @; TWeight 2:  4-6 > 1-3 1 f. o* ^( l# T- U, m

% `) @: }% P) x7 M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