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)。
* U0 G0 m, w8 y, a$ @5 O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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* A" u* c/ e. ~. V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( {! |5 P7 {; A+ A' S8 d) H
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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8 C# w+ e$ C# e; i# ^

4 X. t9 ?5 a% X$ _2 G, L, u2 u! g[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:1 w1 P4 o$ S. U+ Z4 ~5 r  f
相信e條題目都有吾少人玩...

. E3 N+ o% o; ~; q! L# `: k我以前畫左個chart去答,* J, O  N( p7 V- b  T: U9 |7 s
等我搵下仲在吾在
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$ n7 |8 `2 F! u9 T: [. J, i當日用左37分鐘答１２粒波子，差７分鐘才合格。
: W$ L6 A8 D/ e13.........
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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:7 y+ S7 K; [( b: k1 e2 U4 T3 x

) q. K5 E. `/ C- w7 I: f, r我以前畫左個chart去答,
! e! c& s/ |8 |6 v等我搵下...

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7 z0 z% Z( q" O- y* n3 ^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:
& f, U4 i% R& i6 c唔識隱藏...已經諗到..

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1 p. \9 n6 s/ B- I- u! w2 z; Psor !!!....e加改左
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3 _/ X" Q0 b5 }8 A6 B3 A. M( f) `( t2. 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; r* G. H9 P3 p% v, O/ J* Y
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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:
9 U" m/ P  S% I9 M8 E1 U( Q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.: V8 I) R! i" O! {+ x8 a* X
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% A9 S/ w. \2 @' `) }
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.( u9 M; q" F% R

, E* N# `, ]2 c6 G& V) IThanks

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# Z+ _. W! o7 Y$ A不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12! C8 m/ ?( E7 y  r/ K# g
if 1-6 = 7-12     13 is fake
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if not * h$ p  C0 Y8 v- z) e6 v

7 r9 S+ z! L/ `( uWeight the 2 time
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& U  z5 q8 {, _9 r8 q8 f1 E0 ]Suppose 1-6> 7-12+ l. ]3 u+ N0 V! ~. y

; o( b+ l# E" f& N1 k# \1-3 vs 4-6
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Then Weight the Third, \9 Y0 F) w: m! l2 }7 D
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Suppose 4-6 > 1-3
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# ]2 B- O. `: mJust like the first Step
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0 x/ I- m$ I2 P8 b4 vs 5
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+ Q8 Y! B1 [& N% p" ]5 r" bif 4=5 6 is the fake one # X8 x  r( S# C& Z

" J* i) n8 `' b, }7 sif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤+ |: T3 a  B1 I' w( o
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Group A: 1,2,3,4
2 |4 |6 w9 N+ C7 m% A2 HGroup B: 5,6,7,8
6 U! p/ Y! z% ]0 C6 ]Group C: 9,10,11,12, L- ^9 e& @) H& v4 o$ \
Group D: 13
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0 a" K! B/ B* [+ i1 P1 e0 u) _Round 16 D- i5 a% b7 K6 }5 \( D3 k
Group A vs Group B
" d7 W8 v, j; Y/ L如A and B一樣, 即較輕一粒在Group C or D
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Round 2
0 w" K3 R! s1 C2 s# ~$ T再在Group C拆成:
( Z  Z* D& c' ^. c2 Y& @Group Ca: 9,10% s) L) V! C) ?0 ^
Group Cb: 11,12( Y( p( R0 D+ T' K: L
然後再秤, 如一樣, 即13為較輕一粒.0 c) G& H8 M* c, r1 A% q$ G7 ?2 b

) {" F9 }0 ^' R; j" X如不同, 即較輕一組有一粒較輕波子在其中, 4 d' s$ }+ B: m. L- ]
要再秤, Round 3, 之後便知答案.  i  t! J$ p2 g% u2 I1 H3 L

$ b/ G3 I* d7 l8 g# \e.g. #1 假設10為較輕的一粒0 @( W! G) e2 T6 M6 U
Round 13 q/ H2 p' f9 f$ _0 E: _
1,2,3,4 vs 5,6,7,8 = equal! D# p+ K. o% @1 M6 Q. v/ q
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Round 2
. x: z, b6 D3 s! z4 F: Y# k& P9,10 vs 11,12 = 9,10 < 11,12/ Q3 f6 q4 y  M0 D, ~3 k) Y

3 F& {8 i/ x" r( W& E# {0 c: {  \Round 3
) \1 X5 l  W: d$ |% e! I9 vs 10 = 9 > 10
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% N( R* M) \- jThe answer is 10.
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e.g. #2 假設7為較輕的一粒; m, r  a' l$ X9 P) z' u0 U
Round 1- ^" F. }8 A, K( g1 B8 k' u0 G3 V
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
( Q1 I. u) U1 D* f5,6 vs 7,8 = 5,6 > 7,8
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Round 3
* Z5 @; `" F, r0 A& L2 I7 vs 8 = 7 < 8# i8 S1 b( r7 n- W' |+ Z3 M
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The answer is 7.1 @8 R8 |/ D" A- K: l. b

$ R( o- Z1 O% j- ee.g. #3 假設13為較輕的一粒+ g" ^( I. V+ y
Round 1. X  K. `) y0 W5 e
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( W' ^1 p% h1 E' ~. {9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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/ N& }6 d* l- [  |- L. \/ |唔知我答得正唔正確呢?! * {: }& P7 ~7 o
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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:' q8 Y; X6 E- u) M4 r5 g# Q- |9 Q, W" A
1.
" S0 ?$ J& W# O) w  L5 K: a/ C1-6 vs 7-12
5 J) F* P9 R5 u' i; g: C! vif 1-6 = 7-12     13 is fake
! Q/ a5 _# y2 e+ p1 {7 a4 |- Y- F: p5 X* q2 E, Y
if not 1 W) r* c+ q: t

5 r& X8 M; @9 n; T5 \2 AWeight the 2 time
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. X7 U# s5 {6 o9 Y4 vSuppose 1-6> 7-126 b- u6 M2 u. H9 A1 Q; G

1 G6 D2 j/ T; O7 q; v6 U* B$ `) H6 `# Y1-3 vs 4-6
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& [% ~$ F: q+ }0 ]* S+ FThen Weight the Third* ~, O1 `2 v' u9 T9 _& w' F  ?
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& q0 Z, ]6 b4 z" R/ V# h5 Y5 L5 {Suppose 4-6 > 1-3
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+ y% W: w2 o3 gJust like the first Step$ b2 C# G2 i2 H) U! S4 J' j: L9 a" Q
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4 vs 5   N& p1 J& t. i/ }0 n

* Z$ }; F" N7 Oif 4=5 6 is the fake one 9 W+ e+ d- H2 v. r+ o6 e
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if 4>5  4 is the fake one
9 M( _$ v( s6 E5 Mand so on......................

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問題第二步
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1 L; i9 Q$ k: }7 u$ P! w( ^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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) u! B' d: X, V: g8 `* V9 E7 d你第三步点去搵 7-12 边一粒???
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( S. `+ |( H3 @========================================
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1 O9 ~( w! o) W: L- [2 q# e/ N問題第三步
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/ F; H' s8 Z# A% {  \" n9 XWeight 1:  1-6> 7-120 T; [" {4 V% q7 I( u9 _& ?; p
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Weight 2:  4-6 > 1-3 . W' n& d5 ?! Z

2 _6 ?! t; e1 x( @$ `( L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