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 z+ X4 x0 u+ {( ~& D『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)。
1 f+ Y7 T6 g2 X2 |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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注意: ' x  t3 f: E" d; P; D: v

9 H1 `# F8 P  v; |0 ~% O/ H" N3 l1. 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
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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:
2 Q% q( o9 c" d( ]' w相信e條題目都有吾少人玩...

* t* X& s1 p1 x! O6 O  a我以前畫左個chart去答,  Z8 f* |3 o: ~0 y: C
等我搵下仲在吾在* H. [1 c8 Q$ @2 c+ B2 D: q: V
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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3 n- l. R( z  v* t, M, w( l/ J[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:- s# F, P+ H6 u1 r
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我以前畫左個chart去答,2 [9 u) }+ v' u) Q' ~. [
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:
. l" F4 h/ [; j$ ~& {. J, u) p唔識隱藏...已經諗到..

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+ o5 P5 y; x6 r* Z' N/ G# Z- S1 [sor !!!....e加改左
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1 \. |1 d: U0 o: ?8 g2. 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 ~+ X/ Q: r; D2 d/ }
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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:% k2 D: g1 G( Y
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.
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" \! T0 z/ C% B* j8 {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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Thanks

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, ~: p6 z4 _8 k1 e4 f不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
% }  s  Q4 ?; G. F" }" J1-6 vs 7-12
6 W) T$ Y$ i2 P/ h& jif 1-6 = 7-12     13 is fake
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' B5 `/ P# k4 V8 f* }2 H3 m' o8 Xif not
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Weight the 2 time " O3 c1 p, B! _: E: v% M$ p
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Suppose 1-6> 7-120 x; J- a. w+ k3 H3 Y
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1-3 vs 4-6
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' T+ p1 }  F% I9 n: e1 `Then Weight the Third( c6 |( c, K) Q- l3 i6 D+ K+ u
3.
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. A/ X4 w) c: j9 B6 ?+ `Suppose 4-6 > 1-33 E0 H$ i5 I; h1 ~) v, A

1 K( t9 D: I( m4 GJust like the first Step& p. O; z0 x; I5 n" l. k& a( J
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4 vs 5 ) M! A3 U# K- {: P. M
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if 4=5 6 is the fake one 4 O* _0 p; [& E

* E9 c; H. {8 x7 P0 H( W% V6 c5 s: ], I  mif 4>5  4 is the fake one 4 }: ]% R4 L+ O( y- X$ G
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and so on......................

hello1997

分3組4隻波子秤- B! V+ p- {+ z* K' e

0 ]7 {0 W+ p; S$ t$ BGroup A: 1,2,3,4% R% y4 b' d: _2 k7 o
Group B: 5,6,7,85 r2 U0 `. e. N
Group C: 9,10,11,12
6 n' E( L' e# H, l/ _Group D: 132 j0 [: _. B' r) u0 M, o

. q7 F. r" A) G: cRound 1- P2 {1 T: I; r1 t  f
Group A vs Group B
2 H( \9 h- \* Q! ~6 u如A and B一樣, 即較輕一粒在Group C or D+ ~- l$ i8 E( b( ~0 P* }6 o
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Round 2* i( J; E. e# h7 I
再在Group C拆成:
: P: B7 c+ r8 q5 nGroup Ca: 9,10
* u5 j3 l( f+ S5 G5 z- S' XGroup Cb: 11,12
' V' n( T7 G" I0 v$ j; A" W/ k3 u然後再秤, 如一樣, 即13為較輕一粒.& `- o. x, o3 F* C6 E

9 A! E: s5 ]' k/ x- ]: n! e; _) f* F( A如不同, 即較輕一組有一粒較輕波子在其中, 0 }/ C. P- D* A8 \
要再秤, Round 3, 之後便知答案.
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) E* ~7 M: v* ^8 s" F: d3 Me.g. #1 假設10為較輕的一粒* W! i( ~* g0 C' @# O  \
Round 1
$ A7 @. Y4 j" a5 M$ `3 N) \1,2,3,4 vs 5,6,7,8 = equal& n1 r7 q2 }+ J5 \6 r

" a2 j8 s4 o, ]4 l% FRound 21 E7 A( ^+ D; ^' S( f6 u
9,10 vs 11,12 = 9,10 < 11,12/ ?* }. b) m8 c0 x8 E$ _

: `3 |5 i+ J+ m. y$ xRound 3
9 K, O5 P0 M# S: E6 \9 vs 10 = 9 > 10  |: o: t- Z& o- E
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The answer is 10.! e  ^1 ~" A1 X& o- \, z
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e.g. #2 假設7為較輕的一粒/ u, G* B# X6 ~1 n9 V
Round 1$ e/ h1 K' H1 Z# B. C
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" d; @2 O5 B1 A! e/ l8 i

2 Y9 q4 P# f1 kRound 2
0 _' j3 f* P7 }8 i5,6 vs 7,8 = 5,6 > 7,8
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Round 3
# l/ k7 B) Y; C  s2 Y7 vs 8 = 7 < 8/ Q5 n7 j. Q1 l3 ?
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The answer is 7.# g! }7 F' {5 K( C' ~; w0 ^9 A3 l8 p

4 z# T7 n( o9 w) ne.g. #3 假設13為較輕的一粒
% M0 D- i+ I( [+ }+ k1 x7 k: ]/ _3 sRound 1
; S( J+ p# D+ }% d0 g8 l1,2,3,4 vs 5,6,7,8 = equal
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7 a* q! B8 D8 C! \! |  RRound 27 H- d5 q5 C- I1 C6 V3 W% Y
9,10 vs 11,12 = equal( ~  p" N* G/ u0 _2 ~$ @- Q2 e
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No Round 3' |$ {; L0 d' g! C/ q

% w7 X' R; a( k5 c. GThe answer is 13.- @( k! p& L! Z. H5 r+ K" {+ p

$ ^8 x  y8 [/ r& I+ J$ h" y0 i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:# M( y' c/ J2 ]& R* m  ]
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1-6 vs 7-12, o9 ^! q2 M" S0 G
if 1-6 = 7-12     13 is fake6 {& O/ w4 v" N
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if not
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Weight the 2 time 2 J+ |% j# ^$ X1 _" g
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Suppose 1-6> 7-12
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  r0 c8 M9 \9 g1-3 vs 4-6
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Then Weight the Third" b: I4 v1 f3 M% f; ^
3.
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6 w/ r% f. `9 \7 D3 y, h1 ^+ V5 qSuppose 4-6 > 1-3) `) K- Q, \, I3 J" q
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Just like the first Step
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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
# z* z3 b2 b# V/ fand so on......................

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7 |: V; M1 ]2 I4 ^問題第二步
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Weight 1:  1-6> 7-129 a9 X  G" f8 U9 K0 l9 W  E8 ]/ L" ~

' d% N# H3 P/ ~5 gWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6- D8 y$ ^7 l, z/ g1 z+ M% H, c
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你第三步点去搵 7-12 边一粒???: ~" L9 o& P0 {

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問題第三步
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% {$ P/ z5 V' d- g3 JWeight 1:  1-6> 7-12
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9 H3 W3 b- a! YWeight 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