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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; o+ X8 F8 }: a3 a0 W『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)。
9 c+ T: R' u& P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？』( X  I+ L$ e+ L
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注意:
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8 ?5 p& A: d' k" A$ p1. 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* Y& Q" J3 P- ]* n2 v$ t! X

5 Q7 x: L7 l9 y/ ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
% r- i2 U' r6 `9 G7 ?( r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,) l# k0 |! x, r, V7 ~
等我搵下仲在吾在! a8 K9 V3 H1 m1 \) N2 ]8 C
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當日用左37分鐘答１２粒波子，差７分鐘才合格。( F3 {: K2 M  F7 n3 E. m2 A: n+ {0 i
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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我以前畫左個chart去答,
$ t- Y) }8 @5 s- t/ K& T! v3 J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:, i) r# G2 ^+ o
唔識隱藏...已經諗到..

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sor !!!....e加改左0 v' y5 p6 H" H3 c/ n. 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
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9 \; K1 i- `- z( f6 n[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
+ _: Q/ r" r8 E! |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:
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2 q: g; D  I8 f  _. s8 w9 T$ IPlayPlay, 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.
8 B( n9 q8 y$ p1 s5 ~! ^1-6 vs 7-121 ~* C5 N; s  s
if 1-6 = 7-12     13 is fake% p# g" T9 {9 p; d# B0 b- X1 K

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Weight the 2 time 2 ]0 X. T) S% i5 v3 W  D
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Suppose 1-6> 7-12
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1 D; w1 O: s  R( P2 |& P1-3 vs 4-6 ) p; D) m) t; U% A
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Then Weight the Third
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Suppose 4-6 > 1-35 x  G# l& o+ _( V) F
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Just like the first Step
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4 vs 5 9 y" {6 ^% }* l+ v
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if 4=5 6 is the fake one
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* m; f4 W$ L2 D: iif 4>5  4 is the fake one 9 \; z% Z: q7 w7 H2 o

2 M) P, N! [1 q: [: q1 xand so on......................

hello1997

分3組4隻波子秤( [" [1 n3 T0 o1 b
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Group A: 1,2,3,4
5 h9 H) ~5 m4 I7 f' N! [7 \Group B: 5,6,7,8
0 N1 x" a1 _7 w* UGroup C: 9,10,11,12* T% E: m$ o5 {+ h  O
Group D: 13- I( A6 Z" o8 }; ^$ J

; A0 J5 Z. `- M- a2 ~8 c& t. d, YRound 1
4 x2 k7 b- N% E9 JGroup A vs Group B9 E2 K1 Z/ `8 [3 |+ O( |5 [/ d9 l: _
如A and B一樣, 即較輕一粒在Group C or D! D, B& E0 L* l( e$ H% P. d) k
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Round 2
8 v; m7 [+ Y8 d0 o) A再在Group C拆成:
- Z9 B8 A3 \4 u1 m; d3 s/ F  WGroup Ca: 9,10+ ~: U' m5 q' E" v
Group Cb: 11,12
( i" |+ U& @  t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, 7 K% ]6 S/ D. W& T7 c5 v
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, @3 o1 F1 U: r
Round 1& K% t& z- z+ r3 Z5 C' h
1,2,3,4 vs 5,6,7,8 = equal9 ~6 A6 D' k& Z- J6 e0 s( y

* H4 I8 w3 F6 k2 bRound 2
7 r+ Z* C0 s- {; v+ ~9,10 vs 11,12 = 9,10 < 11,12" y, A* g1 i+ i

6 ?4 m" M' S9 M5 a( M2 aRound 3
: Y- u$ M8 G! r% m/ C3 H/ o" ?9 vs 10 = 9 > 10# s4 u8 ]2 D) l' ~
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The answer is 10.0 K  J  J6 z5 l, j
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e.g. #2 假設7為較輕的一粒
3 ?% n. c4 ~/ ?Round 1
! V5 ?1 k6 c/ J* ?7 Z+ N" g1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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( h4 j! n, \3 s( z$ nRound 28 w/ O  Z2 x! o3 r+ b, g$ T$ b
5,6 vs 7,8 = 5,6 > 7,8
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: q6 g% n0 @: F$ g" IRound 3
8 k! D% P  A, k) S# M( z7 vs 8 = 7 < 8
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! W$ E+ R& _) z. H, I" V0 c, rThe answer is 7.( I2 I# P* g4 l( b5 n5 ?
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e.g. #3 假設13為較輕的一粒
/ x! A+ C& P8 |/ ^: P2 XRound 1
8 ^5 {- m6 W* q1,2,3,4 vs 5,6,7,8 = equal( r& O& i. c; ~6 m& k: }. Z

& b/ D8 e9 T2 x9 k! i) FRound 2" |4 Z; l5 T) @$ t7 ?
9,10 vs 11,12 = equal
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5 k  C" `0 X3 d. O6 s8 S7 cNo Round 39 T) n0 k2 ^7 [1 {( {

2 |. w1 P5 \) b9 F3 kThe answer is 13.
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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:9 Z3 J( S% }2 E2 P, k- C
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1-6 vs 7-12' e" K4 F* P) v7 `' @/ L3 T
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12& I  y- n1 ?, E3 x# y' B
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1-3 vs 4-6 0 u7 d  c, ~* t3 b1 c9 ]+ W
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Then Weight the Third& E/ i9 D" Y  R8 T' ?% a3 x9 Z' e
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Suppose 4-6 > 1-3
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' r5 H9 k/ c' m, ~Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one + k8 y, [; E5 _5 h
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if 4>5  4 is the fake one ' O( w% f* X1 t, ~- S
and so on......................

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& x! m; |2 X5 E0 C問題第二步
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Weight 1:  1-6> 7-12' m$ r1 }& F0 z! v4 X1 Y# C  [

& B/ V9 N% A1 w* }5 t* i/ LWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6" ^0 B$ s2 [. `) L. N
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你第三步点去搵 7-12 边一粒???
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: s, N& Q  e/ d% l/ M問題第三步3 a' i8 m, C. c: r7 B# m) a

) S7 D  t# X) `/ v; Q' qWeight 1:  1-6> 7-122 v- B' e  p& m: A7 @6 R- A2 ^% A4 D
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Weight 2:  4-6 > 1-3
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: ~" f! t, w6 L; \8 G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