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)。
; p1 R( N# P9 Y- i, }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？』; }/ l# z6 e' j9 n# C% T! s2 [8 R

: x  w. e1 Z8 Y# K3 w8 {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1 N. z2 ]) p0 p5 i

; b, U+ V1 |# w( b2. 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
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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:( }" V- l% U& m3 j! @5 |
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,
4 u  ^4 U# @7 ^2 w' _等我搵下仲在吾在6 ^$ f: Z5 o) n- `% P3 J& V% p# |
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
( R6 z0 p/ ^" O" v3 A13.........
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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:* o  r8 X+ s3 _( S+ |; b: \4 d: }, F/ w
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我以前畫左個chart去答,8 U, L" O, P) l
等我搵下...

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! h) V( U. Q8 h7 K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:
- E  v) [9 E* ^. r! w唔識隱藏...已經諗到..

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* ]( N. v  x! S( {( M) Msor !!!....e加改左
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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% @9 g1 j1 O' j7 B: T3 ?( d! f
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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:6 R" }" ]; w$ S; K. \
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.4 Q2 K" n5 o+ _- V  V: N
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:7 V- `* J, R2 r& R* K9 {
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6 ?7 z. D7 B' YPlayPlay, Let me know later who has the right answer and I will add points accordingly.5 l! q! O, S% t, M( z

+ W% G1 W3 ^1 ?# uThanks

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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.
$ o* k1 g- i& I0 _6 ?' r- B1-6 vs 7-12$ C. ~. d% z3 R( J5 }' |
if 1-6 = 7-12     13 is fake
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$ w' h5 n" Y* d1 i' ?0 a/ f) K% gWeight the 2 time
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  k& \+ I' P5 Q& l2 S% d, k2 VSuppose 1-6> 7-12
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1-3 vs 4-6
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0 z0 M! g# r5 \* AThen Weight the Third" g. v& i: q1 l* |) n& a. x
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Suppose 4-6 > 1-32 [8 Y' Q6 X% V$ @* l' y

! V2 `5 f+ b" }5 T3 {: FJust like the first Step: p4 x+ Z2 o: s
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4 vs 5
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/ C4 E: f3 o8 p2 h& Y' Nif 4=5 6 is the fake one
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6 l3 R9 M9 Y" ^: V) c- u+ J6 kif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤0 _  s  s; g9 `9 @
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Group A: 1,2,3,4
' }; M+ }4 q# N$ y" G9 i2 YGroup B: 5,6,7,87 X; [% z1 o- y1 G/ y
Group C: 9,10,11,12: }  F& q. S0 W6 H  \0 K
Group D: 13
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& }# a7 _+ f5 e" {/ hRound 1
$ v! N. O! I( c" N* x0 ]Group A vs Group B
9 p, ?) M8 A! {. N$ }$ }- K如A and B一樣, 即較輕一粒在Group C or D" A# l8 ?! F$ n, I' o7 Y
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Round 2
( w4 d- o: r- S再在Group C拆成:+ n' A2 Y7 s) q9 ^+ ?  X4 R7 s: e
Group Ca: 9,10
/ q5 x. F; [; B" XGroup Cb: 11,12
! Z9 P% i% {1 {9 V, V: {6 f然後再秤, 如一樣, 即13為較輕一粒.. A  H# S5 r# S! R2 ?
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如不同, 即較輕一組有一粒較輕波子在其中,   ^! V; ^5 R* C
要再秤, Round 3, 之後便知答案./ C) M  t/ z6 C! E+ N; _
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e.g. #1 假設10為較輕的一粒; I4 a9 u; {( u+ T+ ]* I" E7 |
Round 1' e; G6 y4 A4 q9 j1 S: e
1,2,3,4 vs 5,6,7,8 = equal! d. `' C* H- R) T4 R- ~

  w$ U% \; O/ v" ~  ?6 J# p1 n% f) W" }Round 2( u* Z, c! Q( g8 S3 T4 r
9,10 vs 11,12 = 9,10 < 11,12* ?% T" v" c% y- Q" U4 q9 O

( k5 n6 {& B5 U$ x* y2 ?Round 3
* {# m, ~, \4 `9 vs 10 = 9 > 10
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- n& C. f1 ^5 f& x. v4 L$ ?8 F9 KThe answer is 10.  r1 u, R* T" C7 ^: Q$ ^# P

- j1 ?. k* ^; p9 p$ t7 P0 Z) `" Ce.g. #2 假設7為較輕的一粒; L4 M8 M  P0 t3 b& p
Round 1. R: V) |& K. p* }4 f
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8' e1 |! ~/ G+ ]! E1 E& B( Q
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Round 2
5 x8 ~+ ]% H. i, {+ {) a6 a5,6 vs 7,8 = 5,6 > 7,8' {" n! m5 ]2 `0 H# r

. t/ S) K1 @1 u1 ?: xRound 3
6 z. A; R- w: X$ ]% ?7 vs 8 = 7 < 8
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3 B2 X4 ^2 G0 Z  ]The answer is 7.
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; X& q' M; ^! R& e: |0 Be.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, g, M" e' S1 v' s

; d& _* a- P; v' y" N* W+ uRound 2
' n2 B( p0 T, p1 ^9,10 vs 11,12 = equal$ U' x) ^' U" p9 R0 L
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No Round 3! t2 Y" k) Q8 c, L( J; L' x
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The answer is 13.
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唔知我答得正唔正確呢?! ! [* [* K2 F9 _5 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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1-6 vs 7-12: d& h7 _0 s0 T4 u+ D. S$ Q, g3 S
if 1-6 = 7-12     13 is fake. a! n5 Q" y% m3 u& t8 C6 J
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if not
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Weight the 2 time % v& p/ l9 j( N

" H: `+ b  i  P4 ]1 Y- K3 ZSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third- C4 T" J, t: r7 \' p
3.% u  `& g' `5 |! M; t5 q" h

2 G$ E, u9 U  TSuppose 4-6 > 1-3# M& r& n& I- w$ S/ u/ X* Q

0 [) I" B/ ?; d7 L! I! A) bJust like the first Step5 r6 }+ {) e: G6 g2 G

" `% [: r- l6 A4 vs 5 ' c$ _' N: p. K8 h
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if 4=5 6 is the fake one / M5 I1 e3 L. a
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if 4>5  4 is the fake one
: g* ~1 f8 O1 V% e, I; j& R( Fand so on......................

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7 E8 e4 F, n8 ?! m- ?問題第二步* V: d* {+ v9 L( O& K) }) w

6 P2 ]4 W; `0 l0 rWeight 1:  1-6> 7-12- y* t! u" h8 {5 a" J
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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' u; m7 \, _) T8 v( O$ E2 R; h) {你第三步点去搵 7-12 边一粒???
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- y& v& X1 M* W7 Y7 Z% W========================================
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問題第三步& m! O& M: Q1 G8 ]' P8 d

2 ]" v* y4 m$ z2 K' q0 b: w" H1 OWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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