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2 I. c4 _. `" Y+ Z1 B
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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)。
, z! W5 Y0 Z9 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？』, ?  r  w3 \  c1 D
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注意: * v' w' v* a1 z( V# M' p3 i
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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# v" O) u4 y! }/ q2 s
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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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! O/ u% u8 a" U6 z5 b6 y: f[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
# d4 ^; N1 k% c( g相信e條題目都有吾少人玩...

  }% |& _9 C6 g" M6 w7 c: p我以前畫左個chart去答,3 J& o9 ]% j3 g% I
等我搵下仲在吾在; `2 D! X/ J, y) s/ ?9 Z" t  s2 u

4 f- c' }% O( N# y當日用左37分鐘答１２粒波子，差７分鐘才合格。2 }0 q0 K( \. y3 o4 w: i: {* [1 Z
13.........
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3 T; E7 `2 ?% C' s[ 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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- m. u# I) s; v2 _; ~; r我以前畫左個chart去答,
: t) a+ M2 f# k5 `等我搵下...

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, v/ r5 T0 ?0 _2 Q8 F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:
- C* O, i- B3 S( z9 p唔識隱藏...已經諗到..

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sor !!!....e加改左' r* z) y/ 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
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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:
$ e* `6 N2 i6 v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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:0 ^1 s* C0 ]7 f. D- w4 \# i
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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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0 K- v* ]! {/ |, A# z, i. F9 I不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
1 @# ^6 K' O+ N7 @1-6 vs 7-128 m! t: h6 o4 m, l
if 1-6 = 7-12     13 is fake+ `  ^6 r) ]: g( F" b' P

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1 z# {! q/ K: G9 B2 gWeight the 2 time " E- H. F8 ?+ l
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Suppose 1-6> 7-12. X; A, O1 E6 B8 n/ i" x+ b( x
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1-3 vs 4-6
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Then Weight the Third8 N* b3 s% }. |  ~
3.
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: }! G( y& r+ S5 w! uSuppose 4-6 > 1-3
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Just like the first Step6 X+ I, T; u$ S
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4 vs 5
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9 y8 t' L" u6 t! D/ A" Sif 4=5 6 is the fake one
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( R1 v# H7 A- @/ [* @if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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4 {, {. @2 X9 g. \Group A: 1,2,3,4
* u) a! S4 ?& Y, c+ J0 XGroup B: 5,6,7,82 K( e/ n. Q, A4 Q
Group C: 9,10,11,12
: u6 P5 b. M6 r0 Q9 rGroup D: 13
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Round 1
! ~1 J2 d" e/ w# D! i1 `Group A vs Group B6 U* H# T' U1 q# Q
如A and B一樣, 即較輕一粒在Group C or D8 I( q# o6 S/ a* H3 R4 l
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Round 2
+ w7 i5 u4 G% c2 M5 \; F7 K' k/ r再在Group C拆成:, C2 p+ z; _7 @. b3 u
Group Ca: 9,10/ M  m# x2 u7 H/ P, R  s# ?# c
Group Cb: 11,120 e3 Y/ J. N2 b9 }, {# `
然後再秤, 如一樣, 即13為較輕一粒.3 P0 R, O' A- j' R" x
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如不同, 即較輕一組有一粒較輕波子在其中, 6 t/ U  M# s2 R/ j4 F$ _5 l
要再秤, Round 3, 之後便知答案., L) L% _5 q$ U9 y  [4 u" n& b% h, }
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e.g. #1 假設10為較輕的一粒, L3 e( D6 D- M) h: G) o# u+ a6 T
Round 1
7 I. u8 _0 E( u% D- I. _; k1,2,3,4 vs 5,6,7,8 = equal' A. v% z7 @5 t* u( p* h

) f: Y9 o. T( J7 Q! f) nRound 26 l4 E& z1 g8 i5 s
9,10 vs 11,12 = 9,10 < 11,12
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3 a1 c9 ^. S& ]6 s: [: U! V3 IRound 3
* A' R1 ~% o6 F9 ^1 N9 vs 10 = 9 > 101 J6 a% b/ E0 b+ V- p% K1 X
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The answer is 10.
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e.g. #2 假設7為較輕的一粒% m0 x1 n+ m  |* Z! u, v/ M( r2 I) X
Round 1
5 o9 d$ o& m8 m4 r% |3 }1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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& Y9 i' W- m8 c8 H  c+ G$ k& YRound 2
& k( h- g+ ]& l5,6 vs 7,8 = 5,6 > 7,8
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; i8 B2 n: o/ u! p& B. Q: VRound 3
3 C7 v9 z. b! X7 \$ T4 y# g7 vs 8 = 7 < 83 Z9 ]; Z3 a5 [2 q' @/ D6 l# q

: \% @9 v9 A3 J$ Y3 w; E+ PThe answer is 7.
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e.g. #3 假設13為較輕的一粒
5 k9 C1 r8 j1 kRound 1
; s: p0 M' V' t9 f; V' }  C* d1,2,3,4 vs 5,6,7,8 = equal
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8 t& L1 _: n9 Y% e: PRound 2, D2 o; O9 ^4 Z" F; _8 p
9,10 vs 11,12 = equal
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* K0 F( X& L; E# n# lNo Round 3
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6 V6 A( K! U* S6 M' d5 r: I. ]! q1 MThe answer is 13.; P& c8 x. {) J, q6 f$ v6 _) u! l

/ J7 o; e! W. @( K唔知我答得正唔正確呢?! 7 H( I2 I1 d4 V
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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:+ ~/ N* D0 x. }# {
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1-6 vs 7-12
* h+ @/ E2 h, z/ h0 W$ n& Zif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time ( U, V+ ~7 |' m7 Z  _6 O1 T

1 P+ ?& [  ^) E$ SSuppose 1-6> 7-123 i# R7 W. j4 V1 i3 F* l& k
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1-3 vs 4-6 * }' K7 m; }+ O! }
; v8 [! u/ j+ H( G5 @# T
Then Weight the Third# V4 Q9 Q5 o& ]. O! o2 \1 c: r
3.
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5 h/ t7 M- }0 f) l; cSuppose 4-6 > 1-3) {* v; c  x, c- C% P) S* T
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Just like the first Step
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+ Y/ m2 Z" s0 v$ ?' \4 vs 5 " e" Q* c/ U! |5 `

& p/ H7 u6 u/ dif 4=5 6 is the fake one
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if 4>5  4 is the fake one
) q( Q1 b% ]8 r* S3 F, w# v9 Pand so on......................

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問題第二步
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Weight 1:  1-6> 7-120 p3 Z5 S& J; u
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-64 h* ?5 r0 R" P2 {/ `
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你第三步点去搵 7-12 边一粒???
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3 [, l6 @+ T" P問題第三步# I/ ^( C4 e2 A% K# b

, _0 p- m' }# F, l$ K. z5 C+ ?Weight 1:  1-6> 7-124 r$ y! e* p' S2 F) @2 J3 h- @
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Weight 2:  4-6 > 1-3 : d' s( f0 ]$ E8 n
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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