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+ G. |3 }- e2 W* {5 }
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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)。2 b' D3 {8 U, F# t% u4 ~
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？』& k4 K; m- i2 y5 u; D3 N

1 O- t, J" [$ a注意: ) X9 B, X, g; i& ]" n' X
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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/ s5 R& ]. B/ C

" C- I6 P3 N" f; a2. 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1 z9 @0 g* Z& X- d# O/ x& e; ^
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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 21:34:5 P/ D' h+ W2 U  a% Z& @% x4 H
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,
. H! x3 Y7 H, X9 s等我搵下仲在吾在
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9 y8 M8 _* T+ H當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 I: N6 h& X$ f( v  y8 R! F/ f13.........
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' z/ T" K) U2 I8 @& X" Q, [[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:) ^0 L, i6 h! q& g( w; X
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我以前畫左個chart去答,8 Q" }: k: n7 I
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:
6 o$ v: y9 M6 Z- O9 N% U1 p唔識隱藏...已經諗到..

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sor !!!....e加改左8 J7 d7 _, z$ Q1 @* y# c

: n- |2 N- s0 @4 o, g" z8 Z2. 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6 ]" {- `0 Q1 i+ J
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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:
8 C& S6 U5 {6 {  P; U. r7 O4 b相信e條題目都有吾少人玩...

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4 o' |! `( T7 v" Y5 R7 iPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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( f' M) ?7 j! |Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; |# [. s7 Z% W& U5 ?  [* `% J

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: t6 M6 R# `9 p- R- D1 j* VPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 r. G% O: d( M) Z# z) s9 P
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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.
; j( M6 @+ T9 W9 J# N# {/ B- N! q* l1-6 vs 7-12
( C' h" D, D, t; T6 \, x/ Tif 1-6 = 7-12     13 is fake7 Q& q% x6 w1 z, E% h5 `; \

' R% h/ R% Z1 \9 Q3 Tif not
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Weight the 2 time
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+ B! F/ Q& P2 nSuppose 1-6> 7-127 u  N+ q4 i/ P  I7 o
0 B1 ]! V% T1 R. B" U$ j2 M/ d% {
1-3 vs 4-6 5 n4 k! m% [; L' w6 v& A0 g8 M
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Then Weight the Third5 X& V5 V0 N5 }# Y; W' z
3.2 W& @8 t- t8 I5 v# k6 Q* z. ]

8 l. q! s/ G9 p( [$ iSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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, F# K7 K& \' x/ y' L: c7 r1 i) A/ @if 4=5 6 is the fake one , h6 ]/ O, `- K/ ?, r5 \
4 {5 b. A+ `2 C6 f
if 4>5  4 is the fake one 2 p  g0 J+ {7 c$ y) {6 ]$ K
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and so on......................

hello1997

分3組4隻波子秤
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4 v9 O4 Q0 F9 K' u" jGroup A: 1,2,3,44 @* B# [/ K# ?) s. E) I
Group B: 5,6,7,8
- c, s( Z! A) _Group C: 9,10,11,123 W. N$ B0 e+ {1 L+ C2 S8 v
Group D: 13
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% @+ S1 Y7 v( v+ ^7 J. qRound 1; R; k) G' k& X' ^0 D- c, a6 t; H4 `
Group A vs Group B8 ]" ~4 }, \* Y8 e6 m0 |8 x$ q7 k
如A and B一樣, 即較輕一粒在Group C or D
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Round 2) u6 u2 A3 p: y& d* h: e, d7 `$ F: t
再在Group C拆成:/ y+ Y# S4 {6 s6 U
Group Ca: 9,10* V5 n2 J1 m! J4 F7 u$ V
Group Cb: 11,12
, c* l- M4 n# B- {然後再秤, 如一樣, 即13為較輕一粒." e+ y7 T7 }6 [# r. l& u

1 G$ T% `6 }2 S& \' H如不同, 即較輕一組有一粒較輕波子在其中,
, I4 m8 \  d2 H要再秤, Round 3, 之後便知答案.
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" J6 }8 X0 r* ?! R& {7 w% o7 S  B4 K1 le.g. #1 假設10為較輕的一粒$ ~) `; r( q4 u% M7 s; U& l
Round 1
: ?  ~! o3 ^/ k, i5 A9 c! Q. v1,2,3,4 vs 5,6,7,8 = equal
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5 `1 e0 q8 K" N+ l9 X; `, \; lRound 21 P. y, o! U" a% _2 g* t! H# B
9,10 vs 11,12 = 9,10 < 11,126 X) u, X7 T6 Y: J1 J* i

0 W. a/ F* p3 n5 V; O7 F% }- GRound 3
, {; O0 n, @/ f1 [- H7 u9 vs 10 = 9 > 10+ f# g( E# _' I& D; o1 ~+ Q
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The answer is 10.' L* m; @! M$ W% W* n. @

  }& f9 d- _) R. K2 he.g. #2 假設7為較輕的一粒1 z, y0 w$ T" _9 M7 K. U
Round 1
) d8 [: w, e" j9 d' Z) n0 j+ j9 F1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# ]: D0 Q& T& e  ]2 |9 Y$ x
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Round 2
" ?1 p& v% v" f+ H* o1 a5,6 vs 7,8 = 5,6 > 7,8
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Round 3/ G  ~8 p6 n3 E: L
7 vs 8 = 7 < 8
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The answer is 7.+ A& L- c8 f$ L- R1 n
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e.g. #3 假設13為較輕的一粒* I. Z& J0 S% [; n  Y
Round 1: R% j9 d% @5 p; @9 B
1,2,3,4 vs 5,6,7,8 = equal  g( `, [4 _9 U: `" a" Z$ f

) L/ @' D9 G: u" Y! ]( T4 zRound 27 e$ h$ e/ ]: c8 t: R4 s+ L6 `
9,10 vs 11,12 = equal! m3 {6 @: ?! d8 D# ~9 z& ~% f
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No Round 3
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" @8 L/ ], a; x- d: X! _( W% XThe answer is 13.' M8 m- D6 N0 W# k7 C

$ ~5 W/ T/ k4 W5 r' G7 m& B$ _唔知我答得正唔正確呢?!   _! `1 I8 C3 z6 }, E  ~1 `
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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:% I, P6 J/ l6 A6 Z; b8 ?8 |
1.
4 G( _3 g8 b5 z- O% }, E; G1-6 vs 7-12  p2 O1 P: r$ P0 ^
if 1-6 = 7-12     13 is fake# p( P6 u" d/ M* B& M
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if not
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Weight the 2 time , d; _% |8 [" A# e7 K3 R5 K

  J2 e6 r% v2 b- i1 TSuppose 1-6> 7-12) O! g. x2 L7 v7 p  d5 b
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1-3 vs 4-6
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5 Y; X. r  l  g) G# u! nThen Weight the Third
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" i. n# {3 B$ p3 [+ C
( T; f! u, e( u! J( _Suppose 4-6 > 1-3; e) Q+ ?+ t  Q5 @* J9 y

2 w5 \7 h2 x7 [! pJust like the first Step
+ C9 j1 T( _0 G$ E1 B# o" z8 `5 H9 i) s  H/ q9 L- W3 R
4 vs 5 + k# Q& I" Q4 B& v: i

: m1 @9 L  r/ ]4 B7 `if 4=5 6 is the fake one 9 O! q  R2 z3 J0 `7 ^8 K; V
  Y' j7 m& a  P! m. {2 m
if 4>5  4 is the fake one 1 a0 B( D/ [4 u
and so on......................

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/ A- o6 U5 J* U- P問題第二步  j7 |6 D( i' x

4 W2 X3 I7 y; XWeight 1:  1-6> 7-124 x/ N* f: \+ G( y! z! C

8 I+ l; p  K( Z2 @# ]5 N, j; x# @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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問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 9 ?: {! s) j# z6 l

3 K( X; H/ N1 A. u' H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