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)。
4 J3 l: A' F. Q7 \! ]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？』4 r# ]4 V; [5 m/ q* H1 t8 L8 t

7 B& \+ U# f* s5 z9 i; ?. ~注意: . o" \- |% t3 g% X/ D$ G6 R& y
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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
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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; k- K5 q+ m# w# U3 X$ v5 }

# C& M. I) l  z$ N  k[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:1 l& C8 c6 n6 D) G5 ^: w2 o  |
相信e條題目都有吾少人玩...

% A% A+ o9 g) X# F( a我以前畫左個chart去答,/ h7 s' U7 B* n2 I5 P9 F
等我搵下仲在吾在( P  U- x; W# [( V- J* Z/ w# F7 e
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當日用左37分鐘答１２粒波子，差７分鐘才合格。/ L" U9 p( f# m
13.........
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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:
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( a! \) _' w8 \( R我以前畫左個chart去答,
: a/ |( y0 X( t) `: N/ R$ H+ n等我搵下...

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" E, f  s' a% v& G4 ^2 a0 M4 _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:) R! U. N3 Y5 [" w3 U1 {, L. B4 l
唔識隱藏...已經諗到..

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sor !!!....e加改左3 }3 c% d9 ^4 C$ ~7 ?1 u% ?0 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) |4 O6 f* `2 M7 O

) V0 X3 g8 }/ q' t7 G# Y; I/ W0 j[ 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 Z- U' O2 b& @
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.- D- C  g5 C- E- x" {2 `  F

. L' V* @; G/ ?4 f+ qThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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4 K/ G0 B) e% }. Q! `% @4 u4 b3 EPlayPlay, Let me know later who has the right answer and I will add points accordingly.& `) H& W- e9 [. T! H8 D

+ V; o+ g8 o$ \( FThanks

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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.% f# u1 s+ L; B* ]5 e  ?
1-6 vs 7-12$ ~+ O# j& P8 G# w2 m1 F1 u& Q
if 1-6 = 7-12     13 is fake
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7 O- J) P+ _& e0 z* \: h# o, bif not
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5 p) S3 H  A% b8 r, d% K, N/ TWeight the 2 time 3 M( u/ k( M! w
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Suppose 1-6> 7-122 J  G) N/ H, E) e
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1-3 vs 4-6
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# L  t0 E3 M! o; N! G" A9 U0 y2 kThen Weight the Third
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: D: ~3 R* q2 D% o! {. J& fSuppose 4-6 > 1-3
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Just like the first Step# m) N1 h6 g* z8 k2 a

, ?8 d- c8 c. ~+ S5 y  P2 N4 vs 5 + Z, {/ d# J9 k

. S9 L& J5 J% [' x* _; zif 4=5 6 is the fake one * n7 u/ C1 y. m# y7 d. s* `
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤! y- E* h2 g; H; F' D/ `4 ]
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Group A: 1,2,3,49 K  @) a$ k+ w7 u# C
Group B: 5,6,7,8: x; N4 c! Q6 Y2 _9 E8 m$ s1 u
Group C: 9,10,11,12" K, _& U4 C! v7 j
Group D: 13
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  t' G0 t) h/ w0 LRound 1
* k# @5 t# D5 ^- s1 P5 h' BGroup A vs Group B- v; b; m$ Z7 A9 F" A2 [
如A and B一樣, 即較輕一粒在Group C or D& I+ |3 r1 ^6 T. l; B
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Round 2
5 O+ X2 F# }4 ?1 w8 E再在Group C拆成:+ R/ E4 w% E/ }. E5 v* ]
Group Ca: 9,10
' N( j9 D- p2 d" J7 q$ MGroup Cb: 11,12/ J. Z  I: V1 ^2 n) k1 G" r1 w
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, : e- _' S/ t5 d5 K. @
要再秤, Round 3, 之後便知答案.: O5 B) U1 w5 r: V- U
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e.g. #1 假設10為較輕的一粒
4 ~! |& d& T% c9 k# ~. H! c% dRound 1
8 r8 z4 \# d. ~1,2,3,4 vs 5,6,7,8 = equal
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; O/ G' i1 P; l: l. y4 G: |' ~Round 2- p: }$ d, A- }5 o: g; n$ F
9,10 vs 11,12 = 9,10 < 11,12$ M: n+ B+ }8 C% w/ `8 W
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Round 3
3 U4 ?* P' H! f9 vs 10 = 9 > 10" }9 d+ g8 ?0 y

. E) P( v: I$ c  T$ CThe answer is 10.
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e.g. #2 假設7為較輕的一粒" ^7 f+ N" k0 _( u, Z
Round 1- N1 `, F2 }" V" S/ F/ B
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 ^8 c# g) `) `3 ]: m$ j' P
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Round 2- c4 j' A4 I$ K
5,6 vs 7,8 = 5,6 > 7,8- [: h7 b$ Z7 R2 d1 W- j  ^& H
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Round 34 J. J( D% ^' ], w0 f) g  ^
7 vs 8 = 7 < 8
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# |7 u8 e% g8 d. t. R4 OThe answer is 7.
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. J9 F* o1 {, _1 g$ g, B% Z1 n/ re.g. #3 假設13為較輕的一粒
) z8 D/ L* x$ `) g( r! w: _Round 1
( p9 ^* t0 n: v% [) w0 q6 a2 ~1,2,3,4 vs 5,6,7,8 = equal& U, y. E6 a- ^5 e- }4 I

/ U- ?& B+ N8 ^, E2 YRound 29 d% f# L$ d0 m
9,10 vs 11,12 = equal
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No Round 3
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4 v9 C: Y6 j, Q: V. j9 e" OThe answer is 13.6 C2 u+ w/ c4 r( T! ]3 I0 H; q
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唔知我答得正唔正確呢?! 8 }# a9 o" ?$ a& J$ b% w/ `6 _
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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:9 `, Q  `9 O8 Y% l+ a/ m
1.( S9 D2 N1 o& C! S' C6 Q3 X4 @
1-6 vs 7-123 j! h. I4 B6 j7 L: Y; v6 a
if 1-6 = 7-12     13 is fake
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2 N% u% Q4 |7 Z2 U5 E8 L, Tif not
( U9 f* ^" v% ^. ]% O
4 E* P' |2 h7 NWeight the 2 time
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Suppose 1-6> 7-12; `# \7 X( P% M, s; F1 s& T
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1-3 vs 4-6
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Then Weight the Third
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6 d( N9 K- s+ {1 q$ S3 h7 XSuppose 4-6 > 1-3
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, r2 O: D( p1 ?4 r5 zJust like the first Step: z0 v% E1 D6 W  k
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4 vs 5 - g0 e9 Y* [$ n5 ~" o4 D% J
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one " B4 Z- |; K, B) U: {" ]
and so on......................

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7 y5 O5 i! Z+ C. H# p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
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8 _; D; B2 W5 @, ?0 B5 L你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步
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+ I& f$ w2 ]8 ?0 V+ ~Weight 1:  1-6> 7-12
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8 Z- |& L) I! `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