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* g1 I$ X5 m2 c0 O' s, _: `% V
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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 r4 V+ j  |- x) C. |0 @. {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？』" A" v  c7 N- q* {

* X$ l  @7 ^+ t( ~4 t' a注意: / A% ]! ~' ?0 I6 O

1 [" W9 i+ J7 z1. 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& T: x: F7 J2 q
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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7 \- {4 @7 I  H5 V0 C  W
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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:
- _6 V% V7 b" ^' ~$ r. Q% b相信e條題目都有吾少人玩...

- M; I1 i7 a2 `. m; @( J我以前畫左個chart去答,. C. U# B, |% q& h; y
等我搵下仲在吾在/ A, P: I: v" k- ^7 p

( C$ ~3 k9 E/ M) M& `7 N. M7 [; h當日用左37分鐘答１２粒波子，差７分鐘才合格。
5 c- r8 \* k& \2 z  m; U; g13.........
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9 @# v& H" Y( C( d[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:1 d2 ~- }& D$ z- _  e" [
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我以前畫左個chart去答,
8 G. g" {( U; Y9 \" x; D等我搵下...

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" X! f  m& A! v6 r) \) S5 P9 I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:
. l7 h; t9 H! p0 R! f9 n唔識隱藏...已經諗到..

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* {% c* y5 I& c2 l9 a# ksor !!!....e加改左- {" g" i7 d- U8 z: z3 b: a; N

6 q( Y9 `: `9 {4 q8 Y2. 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3 M4 I- y5 L* S, z$ i7 i

& F& R4 |* n& ?/ p- b2 L2 C1 v[ 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 j  f+ K' B" P1 u' T
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.3 F; n' A4 f. Z' b; `6 e$ Y, m
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.$ L8 M" N; D5 ]2 @  ?( I7 G

  ?  z+ c# j: |9 X9 K- ZThanks

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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
4 I6 v  P. M2 h! E  n0 mif 1-6 = 7-12     13 is fake
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Weight the 2 time
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" N- e9 ^4 c7 LSuppose 1-6> 7-12
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1-3 vs 4-6
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6 t, _. g+ e/ C' h9 _+ JThen Weight the Third$ ]* R9 q8 J0 v
3.
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, h3 e3 H- Z( _: U, C* gSuppose 4-6 > 1-3
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Just like the first Step
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3 r# n" q2 h+ F4 vs 5 + o& B1 {* {# s+ N( T
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if 4=5 6 is the fake one ( s- l% E: H. C3 p" D
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if 4>5  4 is the fake one
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' M7 i0 \% s2 j$ K* d7 w# U" land so on......................

hello1997

分3組4隻波子秤
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4 H# ?5 n9 }1 W1 jGroup A: 1,2,3,4( X' O5 P. A- f7 y: J
Group B: 5,6,7,8
7 a  k7 z$ N5 _Group C: 9,10,11,12* P# A$ R; k; ~1 k: y# j7 r
Group D: 13+ z2 _% d# o$ g% N2 H1 Q% x9 L

2 f* y, a- ~3 l/ H  pRound 1+ Q$ e+ z, _0 h5 g# l6 ^
Group A vs Group B! J0 ?2 y, Y( ?
如A and B一樣, 即較輕一粒在Group C or D8 t, B$ K$ t5 Y) M' q9 H( W2 U; F6 [3 T
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Round 25 T$ I0 Z$ i8 |7 g  l; V
再在Group C拆成:9 Z2 w7 U/ M" l  [, G
Group Ca: 9,10
- o( }, z9 N$ ^- X4 m( |# f" _9 MGroup Cb: 11,12$ I; A; m5 `3 W7 y
然後再秤, 如一樣, 即13為較輕一粒.+ E) x9 Q! }+ C) f7 E6 O2 V$ ?% t
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如不同, 即較輕一組有一粒較輕波子在其中,
0 v; X3 d9 l6 I. w8 j3 v) M& d要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒2 X/ `- w+ }7 ^& R- X! ?
Round 1/ Y# R& [$ E. r; ^* ^4 Z( q4 n  x4 B
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
9 G, v- C6 G9 [9,10 vs 11,12 = 9,10 < 11,129 u& c, @  l# R5 H) O( T! e

0 [0 a6 [- e0 P' x/ H. B4 qRound 3& Y3 |& {0 ?! \* ?# f# `* p
9 vs 10 = 9 > 10* Y. Y8 ^- a9 T8 w2 h

4 h/ E# j1 K, r0 W  `The answer is 10.
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e.g. #2 假設7為較輕的一粒; Y9 S# _: d2 `  N
Round 1
' S! C* a0 z: z/ i) z( ]1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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: z7 ^' y* s, s# V/ \Round 2
* \# M# |, b! B+ e* [6 |( g5,6 vs 7,8 = 5,6 > 7,8
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' T8 D+ y; l% S+ d3 S0 C" f3 S* GRound 3" \6 n& O4 F; ], a2 `
7 vs 8 = 7 < 8
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The answer is 7.( E6 n6 S! T" g( i) I, I. S
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e.g. #3 假設13為較輕的一粒. ?" B9 J( D( l" w$ N6 @: Z* k
Round 1
! Z% X" N* c8 }% [6 u1,2,3,4 vs 5,6,7,8 = equal3 e$ P1 L, ~& Z( j" _% ?0 M' k1 O

2 F8 m3 ^* A2 e- l2 _' jRound 2
* ^: K3 x; b3 z0 ^  [. z9,10 vs 11,12 = equal7 e% r5 \2 ]* I' H! z& o# A4 K

/ V9 H/ w6 r) @. t8 iNo Round 38 g0 o' o, i6 U- f2 j3 `

- I1 {- d8 B( Y7 I, |2 S" }The answer is 13.- |( y' s" ~/ W

+ ~: o. S  w- X8 n5 b. ]" z* h唔知我答得正唔正確呢?!
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; b. ~( c- J" K! q# b[ 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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% V6 W  W0 u; d6 Y8 D5 T# o( \1-6 vs 7-127 R- {; d2 }$ B( S
if 1-6 = 7-12     13 is fake+ s1 Z( Y" W$ b. A4 D6 J
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if not 5 q9 Y4 I% j$ j  Y
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Weight the 2 time 9 ]$ m  @8 a; j: ]. S  c, X

( @2 R  L3 [9 q; t: z$ lSuppose 1-6> 7-12
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) P# G. H- L8 j+ [. x1-3 vs 4-6 $ ^: N% l2 f' W# ^8 U+ d8 t$ c
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Then Weight the Third+ ]7 i7 m4 G! _' E
3., X9 ~, N# [0 H" O0 M% ]9 Z

5 P% Y+ P2 `- ZSuppose 4-6 > 1-3
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Just like the first Step/ o  k1 G$ n; f: g9 Z
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4 vs 5
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if 4=5 6 is the fake one
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! O& u( Y" }. mif 4>5  4 is the fake one & ^2 s7 r, p/ d1 g4 |5 l* L. |
and so on......................

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8 f3 U0 D: q. |+ t問題第二步* y+ b% [8 ?) D7 s. c& s, F
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Weight 1:  1-6> 7-12& u% {) M1 \# t5 z2 ~0 E
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6  [; e! {9 Y' o2 r3 T1 h1 G
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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4 J& \7 o* z' m& {9 y0 `, j# x' S
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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8 Y* E; |9 ]3 l9 `1 q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