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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5 W& `+ q. a+ [3 z『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)。% y) T: T+ O  ]7 ?3 q2 d9 H8 L$ {% j1 h( n
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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5 a/ q8 }5 A" L$ h" \注意:
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" m# i* n, E9 G; X2 y1. 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( U6 U' F* e& ^- M, V& \% o
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' Q3 Q$ A5 K8 |, ?" J2 A0 r% J" I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,
: ~( W4 O0 v$ B' U% ^7 w1 |等我搵下仲在吾在  `" P2 O; s, \

# W+ _( \4 P& E. c9 J) K當日用左37分鐘答１２粒波子，差７分鐘才合格。& Z  A2 c' _4 U; W% [" o2 `
13.........
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# |. d- h; f3 t  i" [( z[ 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,
" {4 [0 d' h" `等我搵下...

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# x* G& T5 @6 f% o6 X- u6 z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:
$ b6 ^9 ~& K& b4 D8 I唔識隱藏...已經諗到..

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2 ^! _2 J9 z3 m) ]% S8 Qsor !!!....e加改左$ ]5 O7 q# o1 {7 Z( X3 A! z+ H# Y) B( {: s

/ ~  S% A9 F! N- E, o) N2. 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4 ^- A+ c) X& _0 x2 T9 x9 I
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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:2 A8 F+ D* r" B$ X
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.% }' n, u/ @! O' E  M/ Q
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- F6 [; m' R8 z

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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.
$ y! g4 B8 R. F. \4 {! c1-6 vs 7-121 o' t, R; {$ b& [: g' I, b% s  E# C/ ^
if 1-6 = 7-12     13 is fake5 T& D1 a. d# Y2 d/ J

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Weight the 2 time
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- ?0 \9 [* l) j* [Suppose 1-6> 7-12
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1 ?- U- t( M0 C. w( X) X# Z& O: D' T1-3 vs 4-6
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* S# f( f. I) i  {Then Weight the Third: ~' t! i+ a3 ]& k/ {
3.1 W7 N( i! b: I- o8 ]& |

/ Z" L! n! n, j  m) fSuppose 4-6 > 1-3
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Just like the first Step7 Q4 w1 I7 a, h/ w' W5 ]6 |

. ^5 S* i8 @( G6 ]- G4 vs 5 + [2 _2 x0 x) y% A* J
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if 4=5 6 is the fake one 1 t) l' Y; K! Y

, o* O: S7 z0 s. p8 P* u; uif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤  ^! D: a0 }: n; A7 G

) O  Y% N, H" P' H7 M4 J* zGroup A: 1,2,3,40 V; x4 q( ]# }7 T$ m
Group B: 5,6,7,8: \% Z7 J' u6 D3 ?; p
Group C: 9,10,11,12- A+ ^2 k# m* t0 q, n
Group D: 13) G/ @2 q1 [- R* ?
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Round 1- A: P2 F$ h! j4 D5 s# n
Group A vs Group B
7 `; T0 L) s! g如A and B一樣, 即較輕一粒在Group C or D
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) _( k5 e$ j# ZRound 2: }# O, [) S* u, O3 F4 A& Y' g: F
再在Group C拆成:
, e- Y# P5 u' \3 pGroup Ca: 9,10
$ X3 r& Z$ _% f6 ?2 OGroup Cb: 11,12
- F# F* E1 _) Q( H2 J2 ~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, - {; q6 F' M6 Q) H
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
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1,2,3,4 vs 5,6,7,8 = equal' J& u- l. C0 \- T& [& j
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Round 23 j4 c2 h- N: w1 e4 I' v
9,10 vs 11,12 = 9,10 < 11,12
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9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒3 M( |' T/ T3 w- F  f' Z) i
Round 1
- y# Y5 {& M3 E$ w) [1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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' x3 X8 O  V. i0 Q; {' IRound 23 W; r' s% C5 h& u, F9 j& N% n9 J
5,6 vs 7,8 = 5,6 > 7,8
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/ c1 {$ A+ `- W5 b& y* w) b$ w5 YRound 3* O. q- e- N/ ?$ y3 y  W2 g5 N* ?8 B# l+ \
7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒; K( Q# o, x5 }9 p1 x9 c" n5 @
Round 13 [' G2 X( z0 r7 u  e
1,2,3,4 vs 5,6,7,8 = equal
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9 L# A' _9 F- p/ x9 K, t6 SRound 2
- T8 q/ N+ W: g9,10 vs 11,12 = equal2 E1 ^8 Z8 ]9 Y' F+ v
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! ' V+ t5 s, Y# H

* h- y, F% j' W1 S+ @& n[ 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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' V2 R" x( Y9 X& M( e1-6 vs 7-12
! K4 @7 e! s2 n1 K  ^; \* J" Sif 1-6 = 7-12     13 is fake8 p2 e1 O% H3 k, Q! G+ X+ L

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: w6 U. q6 E  C  K9 m3 s& Z* tWeight the 2 time - J  K5 Y# v2 n# f; T' J( c

* }# e) Z" U' |" E' O+ KSuppose 1-6> 7-12$ A& `- g% n$ l. J# M* q! P3 j4 _  E

' b! d2 c: M+ _( h1-3 vs 4-6
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Then Weight the Third, N# ]8 ^0 _. g- j8 ~$ H7 W
3.
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Suppose 4-6 > 1-3
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Just like the first Step/ e9 j+ O/ B( w2 W' G) o: E* p, W

  J' v+ M/ f" }) ]# j5 \, _4 vs 5 , x/ C8 T1 [6 k  H

) \8 H; r  k" s) L* W/ \if 4=5 6 is the fake one 5 [8 }! |! H2 K/ W* `' L( X9 ^6 ~

% B) H  ]  [4 n: q' J0 p. Uif 4>5  4 is the fake one
1 L+ \& S* _& u% K/ [2 eand so on......................

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  V; J7 h0 [- z9 M- n5 D9 b問題第二步/ w9 D( j$ B2 W/ N

* I; k% j* k+ Z( u/ XWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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% ?! d) E4 s+ S你第三步点去搵 7-12 边一粒???
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8 M  {. l) U  b) F2 |========================================
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: @9 N$ ^$ z  {! _4 k0 W0 [" m: l問題第三步
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( b0 M7 |: E# X/ Q! @Weight 1:  1-6> 7-120 x' K& u; b: T
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Weight 2:  4-6 > 1-3
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, T  y. x' q. B) l7 y7 l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