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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+ O5 D6 f3 n' ^6 g: m" ^『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)。! L/ @# v. Q1 W
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？』3 ]% H% T0 E. M  j
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注意: 4 D, o8 ^# d( z# }+ h2 i9 @+ t

) E; l! H9 S: `; t1. 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. r+ P8 E2 s) @' {1 z3 E/ u  a% }
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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
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  I0 B! R3 R( N  u3 @5 {7 z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 e2 @. u* X* f4 T8 ~, I7 v相信e條題目都有吾少人玩...

0 l. d2 \6 ]- g& j3 O我以前畫左個chart去答,' u# X% ]& T+ \6 r; v+ r
等我搵下仲在吾在2 i0 S9 l  T) d* Q, E) f; z7 i

9 v3 y% z/ T& L$ c0 [8 L( `% N) z/ m當日用左37分鐘答１２粒波子，差７分鐘才合格。  c8 j) u! ?( a0 {. L& ?( R  U
13.........9 ^" M4 q% b2 @$ x; Q/ ^9 _
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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:1 V' g; m8 j# D# g- t& {8 e  B0 O
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我以前畫左個chart去答,% W6 C1 R3 \- v* P
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:
3 q3 t, y5 s' {& }' d- b唔識隱藏...已經諗到..

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sor !!!....e加改左0 Y3 h4 o% j3 M$ `, n2 w$ n! |* w
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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
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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:
1 q) O2 n3 c$ S- y$ d相信e條題目都有吾少人玩...

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& }$ x" n! U" F0 L7 j& f# g' gPlayPlay, Let me know later who has the right answer and I will add points accordingly.' _+ c9 J" e! B. l

  L  C5 Z. N" r: \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.
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3 U; ^: F2 n) ]# Z' `: H$ T: M2 IThanks

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, p9 n+ u5 `9 z$ Y* k) h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
. q; l: `0 X6 c5 Pif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-121 S. p) v& `  y1 q5 W

( o; }8 i' k6 |( N. Z1-3 vs 4-6 * Y: r5 D: {7 R. c
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Then Weight the Third3 P% `( u4 y" S! q1 F
3.
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9 k7 _  G; f; B  ~/ v( ]% g" ]) MSuppose 4-6 > 1-3
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Just like the first Step; a" x% @. B6 q; R
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one - J+ p- Z7 M, M8 s

" O0 g4 j6 ^6 z2 O0 Wand so on......................

hello1997

分3組4隻波子秤$ f+ U& h% T7 ]1 r
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Group A: 1,2,3,4# N3 a3 @' m9 r. L! p- ]3 w2 c6 B/ ?: ^
Group B: 5,6,7,8
: u# k! ?+ L. RGroup C: 9,10,11,12
# ~, H6 s7 V7 O6 F' FGroup D: 135 h: W; A) h$ ~& W
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Round 17 I! x/ U; W4 B! D$ c/ q! P
Group A vs Group B
8 f: {2 P1 T2 c! W4 }如A and B一樣, 即較輕一粒在Group C or D0 O: F) ~: O1 j! C% {+ v

( Q3 }; L& m" N6 oRound 2+ V( Z2 j7 |1 t" @$ X
再在Group C拆成:
6 f6 M9 z' {2 O3 fGroup Ca: 9,10
6 D! s& s/ t- z# DGroup Cb: 11,12
: o# {. C+ g. ~. B9 h! \; G然後再秤, 如一樣, 即13為較輕一粒.
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$ y% b0 p- f2 A8 f( ^- H如不同, 即較輕一組有一粒較輕波子在其中, & T- S6 b7 J2 z) T1 q) p
要再秤, Round 3, 之後便知答案.3 B4 z& C6 B$ ~7 X, j  B# O8 U) g
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e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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Round 2
7 T; V& g* F3 u9,10 vs 11,12 = 9,10 < 11,128 Q# @: O% J4 t, C0 |8 G( N

; h& c0 M/ o9 TRound 3
9 |! o8 Z2 |4 _4 ?5 [$ I" I- [3 ]9 vs 10 = 9 > 10+ F; Z7 L( A7 ]0 j- E. I
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The answer is 10.5 U' M: }; \0 S: G* q

, t; V' o5 {" A- me.g. #2 假設7為較輕的一粒
. h. z! h* E4 v9 C2 J$ A- [" wRound 1; B- w3 O: g! B. e4 R- v1 e
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2$ _# C- K0 e: B6 y
5,6 vs 7,8 = 5,6 > 7,8
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/ X# `% \6 J+ ]" @& q1 n% D8 A8 jRound 38 n# m6 w8 U' q3 d4 m! j0 {
7 vs 8 = 7 < 82 t7 Y( J" R* w4 {
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The answer is 7.( F" m6 W( G  a
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e.g. #3 假設13為較輕的一粒
; Q: a3 W* X3 d$ e/ KRound 1
& A+ U  ^; n( C/ n1,2,3,4 vs 5,6,7,8 = equal
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2 ]! Q6 b2 |' b$ ^7 L6 aRound 2
) e& d8 s5 P, [3 h9,10 vs 11,12 = equal- b' F" u' U5 k7 w& Y9 K

+ Z+ J5 ^, q6 r" k# XNo Round 3
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The answer is 13.
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9 B1 a& }) ]6 V" u+ e- {唔知我答得正唔正確呢?!
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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:0 i4 N3 |; d& F( D
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1-6 vs 7-12: R" O% t" I' H" }5 O2 L
if 1-6 = 7-12     13 is fake
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if not
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& G; u0 j4 l7 OWeight the 2 time 2 \/ {0 C: H' |$ I
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Suppose 1-6> 7-123 L+ u) k. X, i+ E/ D! \; m" c

# W- X4 u. {: S' |# s; m4 i' i, L1-3 vs 4-6
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0 z8 y5 M0 i4 I, ^0 V0 p# Q2 `Then Weight the Third
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/ ~1 q3 y' W' V4 A' Z1 F9 z4 rSuppose 4-6 > 1-3& v) P; J' z. U0 ], t

; J  P4 g0 P7 ]2 M: N3 f8 C7 n- NJust like the first Step
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8 x( a! i0 p* |* n6 e4 vs 5
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7 K2 x7 m9 d( ~: r' z8 ?if 4=5 6 is the fake one 4 d2 I8 {. d; S& l4 ^5 `

0 _& C6 F9 t1 p$ R. pif 4>5  4 is the fake one
% a6 k( [; |7 H0 u9 f3 Eand so on......................

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9 s$ y1 |. C: z9 m# m& s4 T, L問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ v4 H6 @) u1 [3 R. ?( C1 w  |

9 j- Z0 Z7 ]6 }; F9 v你第三步点去搵 7-12 边一粒???$ y9 s- |4 K, |3 m4 J3 _
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' n( p: N5 ?2 X* G3 o問題第三步
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$ X  J" i5 }8 wWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 4 r" T% ~0 n0 w" `' @

3 ^# h1 ?$ G# T4 y* v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