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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4 V0 G  T( l4 }5 t6 b1 H『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)。0 B- p' d3 @) K* H1 ^+ ~# o' _9 g7 M
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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$ ?' e/ Y0 C$ w% e( Z注意:
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2 ~3 {! w% h' i1 |* u% S1. 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* M  Q+ {" U% |7 l
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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:- X" p' D6 b$ a" }
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,2 O( D% L  a6 w" @1 k) O+ g. r9 M
等我搵下仲在吾在( M' p8 |8 s5 |+ k9 T% s% n

/ o' Y: S5 w, B0 B, \; [9 O+ T當日用左37分鐘答１２粒波子，差７分鐘才合格。7 u5 r$ `" Z0 y; N9 j
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,
" _/ Y0 S* M) Z3 a+ }; h( ]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:
1 Z3 K# i7 a- x/ y8 v6 ]唔識隱藏...已經諗到..

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6 ]$ J( @" y. w+ t6 _sor !!!....e加改左( M+ y1 {9 h' e
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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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2 J  a5 E- e2 ^+ R" [9 O# Q0 Q[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: s" }3 S+ X5 t- l$ n3 @
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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  F1 K3 ~4 X$ f' ]& L& g7 s, Q8 L
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.8 S( b; w8 Y9 `: T/ o1 X  F6 S
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Thanks

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# K4 F+ W, H5 X2 M; S3 @不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
8 i4 K9 z1 q' V! \: h1-6 vs 7-12- c" x- G% z8 K* F: Q/ U# V
if 1-6 = 7-12     13 is fake3 k3 g; O$ _7 B
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if not 7 n! R# ]0 J. x  J

/ U. b1 Z" ?1 pWeight the 2 time ; f7 Y( g( K4 x! l8 T& |& m$ y
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Suppose 1-6> 7-12+ Z, S) D8 v5 B
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1-3 vs 4-6 * N" k3 j) h# u9 S3 A

+ J0 D, b* I! v' r, y3 nThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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8 g* w  O/ `% r7 _- v+ o% s* M4 vs 5
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7 F8 f4 m: e& H7 Q7 n% Eif 4=5 6 is the fake one
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% }9 _. b& r, r, q! Aif 4>5  4 is the fake one
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# D7 G) k, ]5 l9 V7 `and so on......................

hello1997

分3組4隻波子秤
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7 T! X+ i' m, D) @Group A: 1,2,3,4
. Z. I2 w8 @! D  qGroup B: 5,6,7,80 Z" s4 a1 @5 e( ]
Group C: 9,10,11,12% O' V. }7 [3 g8 n) P
Group D: 13  M% G% k+ A* F) {/ M2 P

; l# _% Z4 Q. C& j$ pRound 1. t9 z& g* H8 D! M
Group A vs Group B. f* z& [0 X1 g6 C# C. d& p( y: M. z$ k
如A and B一樣, 即較輕一粒在Group C or D& }4 I  r6 Z2 W
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Round 2
1 o0 U0 \; B# N4 [# a- ?- l再在Group C拆成:
  a. i2 Q' y! z5 N5 \7 yGroup Ca: 9,10) {  m$ [' R( g: J4 b0 v" F
Group Cb: 11,12
4 q% h6 v3 Z1 s. k: S6 m然後再秤, 如一樣, 即13為較輕一粒.
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& H% P% h1 h% y5 m% o6 J! M如不同, 即較輕一組有一粒較輕波子在其中,
# b; N# X2 \/ i3 ^2 }/ a# p- R要再秤, Round 3, 之後便知答案.% V( M# A- A/ r5 n

/ f" S2 {, r9 u9 }; [, J8 w5 ve.g. #1 假設10為較輕的一粒
. r; k* G+ C- ~1 p; mRound 1
2 j, h+ N" U$ E! y1 S1,2,3,4 vs 5,6,7,8 = equal
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9,10 vs 11,12 = 9,10 < 11,12
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Round 3- k# i2 E" C$ Q/ s
9 vs 10 = 9 > 10; [8 u4 X# ^9 L) @, t
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The answer is 10.! w. j4 l0 x! f! A& k

% w3 u  T3 S- Te.g. #2 假設7為較輕的一粒& e( Q, f8 v4 u' c# _
Round 1
+ g1 W* y& c- r2 ^1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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1 N- Z( ]1 V0 H- hRound 2
* e! z& @5 ^6 x5,6 vs 7,8 = 5,6 > 7,80 p: [1 A2 w7 W# W% `
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Round 3' g: d0 C* v% C: O
7 vs 8 = 7 < 8
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# E! v  o. R! S; m! O. ~The answer is 7.7 O8 Q$ t) c* Z/ _' P+ \
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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, T' C; d5 {: V* nRound 2( H4 E7 d: D- a' b2 Z; C  Z
9,10 vs 11,12 = equal/ O" m- [6 g$ }# p3 Q; f

( M# z$ ?( c4 ?$ UNo Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! 5 A- G1 _" w9 @, Y9 F' _

! ]% k: r" O4 k, g$ X( \. 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:
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1-6 vs 7-12- f) B$ d' Q! h6 U4 e& T
if 1-6 = 7-12     13 is fake
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8 u8 N& n; i- g1 y2 l* u/ V( ]: g) _Weight the 2 time 0 [6 @5 {3 P6 h
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Suppose 1-6> 7-123 s& m: y# I  F2 f3 `' a% ~% ]
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1-3 vs 4-6
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0 e+ U& }1 G" ~4 r& vThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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3 q- Y$ K, p. iif 4=5 6 is the fake one
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& @* q& @; z0 v6 l7 q8 ?6 Aif 4>5  4 is the fake one
  {, i8 _' Y+ K* S) n. u$ q' Oand so on......................

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( @( T7 S; \1 Y: }' H問題第二步, L( E) g0 ~4 P& ~  _7 G% d

3 z- v# e( T8 k' V4 T- d4 TWeight 1:  1-6> 7-120 F9 s5 O8 K8 n6 |  f4 ~9 R

/ D; }1 ?9 ^$ P" L; ]3 z9 z6 mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6* x, }% }9 b4 \2 m7 T. {) s0 ]

  b( @# H! b! ^5 r你第三步点去搵 7-12 边一粒???
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  c5 T1 V& G# P' o4 E0 _7 I' ^========================================
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' _( f+ [, V% S. E) n問題第三步
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Weight 1:  1-6> 7-12
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% j% F( P0 X1 }- ~+ d/ r& l  WWeight 2:  4-6 > 1-3
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% r5 Z3 i4 k- O- y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