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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( u$ E. h" [7 [+ 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)。9 z) Z, V# z0 N! y$ I2 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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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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) q5 ^) g# s  R- Z7 {1 U% a" v2. 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6 m4 A, X% b+ v; H  Z$ ?& F4 q

2 b( p5 [! z! n" H# v6 ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 H( H0 x4 c6 c3 x8 j) e$ h, R5 C相信e條題目都有吾少人玩...

6 C0 B; p0 ^- j9 P; s& {, U" j我以前畫左個chart去答,9 S! z# R; S/ S& o& ]& V
等我搵下仲在吾在+ b% r' [' r/ }* K0 a

, L8 D1 G9 S9 F, _當日用左37分鐘答１２粒波子，差７分鐘才合格。
; i( Z: |2 _3 O0 i4 B13.........- s6 k! ?6 U. o( n
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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,9 {  X6 j# d4 ]1 _7 v" p* ?0 ?
等我搵下...

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0 I0 z) f) B6 ?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:
, |2 X4 G6 P9 c/ x8 V唔識隱藏...已經諗到..

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sor !!!....e加改左
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; q! S& T3 m; l: E+ `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:& ^: m3 f, X/ y
相信e條題目都有吾少人玩...

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, E. [  C1 }, s% d9 {. A& [  u/ jPlayPlay, 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:
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) ~. y' u/ r1 Z  gPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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" v' J# W# s$ R3 m; oThanks

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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

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1-6 vs 7-12
. F* b+ h) B6 Q0 P# `! R& V# ?8 I! }8 xif 1-6 = 7-12     13 is fake
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Weight the 2 time
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$ [$ g8 X: d& T& y. H3 ^% p9 `3 [Suppose 1-6> 7-12" C5 b" [8 x0 V$ D" D% }8 T$ s
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1-3 vs 4-6 . {1 j8 _, s, O9 E+ }: K, K1 f

: N( X/ j2 C' R+ `Then Weight the Third; C$ z- K$ T4 c) E8 @  |7 W- M5 `7 Y
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Suppose 4-6 > 1-3, y8 j. ?" j1 o# G. {, m
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Just like the first Step
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4 vs 5 5 ^% m3 [+ r$ X7 _& N9 `! I
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one ! B4 t+ |0 ^* ?: N2 @

0 N+ ?' [( i2 ~& Q7 |& G2 dand so on......................

hello1997

分3組4隻波子秤8 D- Z( x7 j8 b4 r$ ]
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Group A: 1,2,3,4
# |# h0 x9 q7 |; P7 |' J. zGroup B: 5,6,7,89 b! s/ v8 ^' U. m) d
Group C: 9,10,11,12
) Q2 n0 S0 f; wGroup D: 138 j* y9 Q" T& Q% [
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Round 1" ^) l' |$ n# S5 E8 k% y" w% q7 r* N
Group A vs Group B' y6 b0 {( U, B5 }
如A and B一樣, 即較輕一粒在Group C or D7 x. ~4 X; B$ P  |0 X6 c

# m; g$ m; B0 d) ORound 2
/ _) K3 L+ `3 o3 X1 V8 U- g再在Group C拆成:
, E/ b2 d  R9 j4 e5 N) `0 v. K5 eGroup Ca: 9,106 g& `! D; X8 r  `6 l7 c& K
Group Cb: 11,129 G* O: M' N. O+ h: c6 H
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,
" {( E2 ~* V6 y+ q要再秤, Round 3, 之後便知答案.
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6 y5 D( @: Q/ V8 J1 ie.g. #1 假設10為較輕的一粒
, n. ]; n7 A' o2 URound 1
. i. `, S. E& O. _3 ^- C1,2,3,4 vs 5,6,7,8 = equal, }  k7 k! ]. r

* T/ D1 l/ r8 A& ?) j, IRound 2/ f. k: I# ?$ o9 Z, L
9,10 vs 11,12 = 9,10 < 11,12/ c! K5 e8 ~; T0 W! H! i

- f: U7 t# K% B# N# YRound 3
( P$ w  O- H% [' }0 O) w9 vs 10 = 9 > 10
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/ p( e& b6 W4 z$ bThe answer is 10.& ]/ q6 }% M* N! r% A+ |! P" {6 ~
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e.g. #2 假設7為較輕的一粒
  w( {+ c% D9 f  H& u) {% e% fRound 1
  c$ ]+ J. c$ D2 P% I) j1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8+ H4 y! R: U' I7 Z4 @
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Round 2
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Round 3' M5 {2 S) |% l
7 vs 8 = 7 < 8
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/ s2 s5 q; s, ?The answer is 7.
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e.g. #3 假設13為較輕的一粒
6 q- t6 T8 g# m. K. A* z% sRound 1
% i5 X  d9 @2 d" V1,2,3,4 vs 5,6,7,8 = equal1 U4 S8 }$ B3 h8 Y! f! [( m
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Round 2
" S5 i7 u( g6 E* s# i+ n& V9,10 vs 11,12 = equal+ h; X' }0 ^# P5 _! x( W
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No Round 33 b6 A/ [! C) L# I' e8 P& X
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The answer is 13.
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+ f! I  R  W5 Z8 Q9 q唔知我答得正唔正確呢?!   ]9 K2 C1 @; a3 P+ L
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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:
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( c  q5 J* q/ K) t# J7 R% K4 `1-6 vs 7-12' E- b  V4 k5 o' d0 v$ U4 e* @( E
if 1-6 = 7-12     13 is fake: s8 Z# C5 [6 P+ s( L1 M' z/ l+ m

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Weight the 2 time $ \/ ?/ d0 I/ z. v) u4 G# D

/ k4 Y  T% m  u- s! u; pSuppose 1-6> 7-12# f, }7 o0 {7 o, b& w- z: |0 R0 E: Q) @
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1-3 vs 4-6
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Then Weight the Third
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- f/ C' Y" N, G, I7 b0 I# \& f9 \2 {Suppose 4-6 > 1-3
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2 s4 s5 _5 }8 m7 E1 m  \6 o7 ?Just like the first Step, W- }: Y" u  a8 ?1 D& g
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4 vs 5
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if 4=5 6 is the fake one
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  Q( G) o; M1 [* @if 4>5  4 is the fake one $ z0 V4 @& `" z4 [" s
and so on......................

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問題第二步
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, I/ W  L* Y+ l6 k/ KWeight 1:  1-6> 7-12' V% e1 m5 I/ u5 l# ]9 D# y
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-66 ^5 ~, ~1 e  L: \6 @

% k" _# W' U$ s+ P+ Z你第三步点去搵 7-12 边一粒???- l$ y# ?, Y1 ~! b' D% o

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問題第三步( `& M8 H% K5 q# `

- M* }& i- v) M% PWeight 1:  1-6> 7-12( [4 d6 Y$ z3 s7 s/ U, x0 X
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Weight 2:  4-6 > 1-3
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# P9 e4 {( I8 {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