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, I' f& _  f5 K0 d# J% d. r
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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 W& N  X$ @# r4 {2 C
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？』& o% H. j4 b: ?% U+ Z# ~1 F* {

9 g" C) E+ s2 |1 p注意:
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3 i& O/ T; M0 q* Y9 w2 Z- a- g1. 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( X! P2 _5 E* W! J
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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1 C4 e6 K$ f: e

1 S& ^% q; x6 \  g, [: o; W[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
  ^2 L, j2 `# O' A相信e條題目都有吾少人玩...

" G3 q5 j: P$ ^/ C/ N% c3 I我以前畫左個chart去答,
' F% |% ]. S" w" q) E等我搵下仲在吾在
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8 e6 Y9 @3 z) K當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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:! B/ r# L* A0 b4 d

$ o9 d  k) |; k" B0 w; w! j我以前畫左個chart去答,
# w( @- N; }9 F等我搵下...

) D4 v+ ?' I' J. t

  U% K) P. ?, x* Q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 A- r% L, L1 y唔識隱藏...已經諗到..

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1 k1 y+ X1 y% J( Nsor !!!....e加改左2 E; \& d8 h9 ^. k
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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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3 _0 l0 F, v+ s) Q( p9 Q; S[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:9 _- o7 U% t% l  o4 I
相信e條題目都有吾少人玩...

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, f. P' E# \- R& U- F' A3 GPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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; r, [2 a& B4 m# e# p4 |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.& j& P5 y0 ?" Q: g4 g
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Thanks

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. }  N" n' U! i. Q4 K9 Z6 v5 ^不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
8 b7 l: l7 ^7 c6 `+ |1-6 vs 7-12
' m0 U$ Q5 B& {( Rif 1-6 = 7-12     13 is fake' z! T- \3 \4 v0 X0 w- _: k7 m

% \5 U! J* ^' {3 l  Fif not
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Weight the 2 time % @& M5 C$ X1 J* i4 P$ n8 J

) [0 y* `6 \4 G  A5 H: ASuppose 1-6> 7-12
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* N; ]- x& X+ O1 ?/ M5 W( Y; ^5 b1-3 vs 4-6 ( Q  o6 o* ?  X6 o# r

1 T. U8 N! _+ c; _. E3 ~+ AThen Weight the Third
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2 t4 G0 I) X5 c% gSuppose 4-6 > 1-36 F0 I" `+ V, ~$ n( E9 Z  L; c! I
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Just like the first Step' Y0 C% X* H  S9 h0 t* C% L2 d, R

( E0 [$ S% ?2 C' R4 ~4 vs 5   h0 s, m- @% T8 t# }

5 K8 Y2 O  v$ D1 W+ @4 W( [if 4=5 6 is the fake one
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if 4>5  4 is the fake one - B+ e% I% X, D$ m  t- d7 _1 q
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and so on......................

hello1997

分3組4隻波子秤0 i; ~9 v+ ~& e

8 j. T7 x) q7 [) s( p2 W: S2 }Group A: 1,2,3,4# a3 E$ f1 ~: D4 [/ z. W
Group B: 5,6,7,8$ ?' k6 Z' z8 _) G- e3 C3 B+ F
Group C: 9,10,11,12+ K) L8 Q  I- C7 o
Group D: 130 N" Z: m7 C  `3 ]7 V/ ~
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Round 1
: O, O, `7 S" E6 h3 v3 EGroup A vs Group B
. r$ W6 H- v$ x- Y; K1 M# v; o9 n如A and B一樣, 即較輕一粒在Group C or D
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$ U* r1 c4 F$ F  W9 h9 `3 {6 {Round 2
4 a0 w  p9 L& Y- i再在Group C拆成:
9 f6 U" c. \) B, `2 _, t5 g% v; sGroup Ca: 9,10
( P% A; m9 L7 f' H0 }6 q7 L- T- pGroup Cb: 11,12+ T$ j% |2 }6 Q6 L
然後再秤, 如一樣, 即13為較輕一粒.( M0 Y( I# v9 I  S9 S: [

3 N# O' p. `6 J如不同, 即較輕一組有一粒較輕波子在其中, 8 |( a8 l  K1 Y/ H3 @4 k
要再秤, Round 3, 之後便知答案.
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/ @* k  ~- F, Re.g. #1 假設10為較輕的一粒
3 T" u* D0 e/ U: Q' U- u& d6 mRound 1: R( ~2 Y, {; I8 t, e5 V5 R
1,2,3,4 vs 5,6,7,8 = equal$ F& N3 _6 u5 u8 `6 F
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Round 2# q6 s) m7 i) I! \9 C2 v) b, t
9,10 vs 11,12 = 9,10 < 11,121 C9 Q. N: e3 u
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Round 3
, y) M% n4 [. |; T( \; n/ b' w3 u6 l9 vs 10 = 9 > 10
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The answer is 10.
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7 I; D% P1 v' A; P: _7 O5 Ye.g. #2 假設7為較輕的一粒2 O% w% f& `& m! ?$ Y: M, `
Round 1/ @1 |( K7 K4 `! n2 j9 h
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 a2 t) t# ?/ @
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Round 28 j- ^0 C" ~6 L" H
5,6 vs 7,8 = 5,6 > 7,8/ k5 E; l5 W3 {# Z
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Round 3
3 l) E3 U5 V/ q8 Y9 ^+ A( @+ w7 vs 8 = 7 < 8
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+ H- T$ p5 D9 j- t) zThe answer is 7.
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e.g. #3 假設13為較輕的一粒
. I& k0 ^; k1 W# u* e, y& rRound 1( w2 l1 r* c6 y4 H% O% |
1,2,3,4 vs 5,6,7,8 = equal2 A5 x8 {7 l7 F' s5 i% ^# E6 _4 B
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Round 2; S3 _* H3 m5 j! m/ `2 D" Y
9,10 vs 11,12 = equal
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' B+ L, k1 \8 M! K  c# {No Round 3
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The answer is 13.% [; U& I4 v6 h/ @

. \; I. z' t  y: e2 m( C: H5 p* m唔知我答得正唔正確呢?! - K$ ~3 Y9 |4 g; H6 P& y

* e3 Z5 y% p5 R[ 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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1-6 vs 7-128 G& [* ?9 M: W. w* A& \* O
if 1-6 = 7-12     13 is fake
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if not - c" i! G4 P0 q& }1 ]. x  v+ B6 E

9 y6 |  t) Z: j( w. O8 H9 YWeight the 2 time   u$ W1 C% F5 y! P, w* \7 u

5 s" D2 z% M: v4 ISuppose 1-6> 7-12# G9 S) P5 g. l4 A4 D$ Z3 g
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1-3 vs 4-6 - p* V& v5 @' f# F# X

1 H' \; a1 X: @0 p+ qThen Weight the Third8 Q7 o# j: q) k( U* j% `0 R) o
3.9 I! |/ W$ v- k6 ^

, U2 O& z+ P5 A9 d: f4 KSuppose 4-6 > 1-36 L8 ^! }$ k0 K" }4 t0 v

1 J  Z8 B. L1 a' y0 HJust like the first Step! M7 S7 U0 U  `2 D) `; L( Y' P
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4 vs 5
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if 4=5 6 is the fake one
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; x8 Z* l0 e; ]if 4>5  4 is the fake one
% P0 k0 V$ m9 K( t6 q) `+ Aand so on......................

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5 I2 G2 L2 R1 d5 e, @2 b

9 O  [# f2 v( T問題第二步
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. y' `$ \; G, @* NWeight 1:  1-6> 7-121 _* z/ @8 O% z: r1 c: h

- f; z7 r$ y1 ZWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???, N8 P1 |- y8 o' Y9 [
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========================================" V9 ]5 B6 |7 D9 y- Z% x0 E
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問題第三步
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Weight 1:  1-6> 7-12
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" ^7 B2 J( y1 bWeight 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