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) Z8 a9 p8 [2 k

* D1 N/ y3 B$ A2 y7 X; `『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)。- _( h  C" Q" p* m4 f
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？』' Y4 [8 y5 [# @

+ k# `1 F3 o. T3 s! m+ N5 ^: G注意:   T4 X. N8 a8 H' P( y( m, w

1 H5 B, r2 f' S9 H$ I3 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$ ]1 T6 W# ~( J4 j4 ?1 M. w

+ i0 m# Z0 l8 P2. 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! Q7 Z* N! c8 [* {) w4 S) g9 V: H
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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:
% p( D7 Y3 p( ?7 |) s; ~相信e條題目都有吾少人玩...

: C4 \4 i2 @) u0 b1 O# s* D7 v我以前畫左個chart去答,/ N3 U% N/ z. o9 E# L
等我搵下仲在吾在# \- W5 H; d5 o* X& c$ m

% t; r1 x( u& r8 d% _. l/ Z; _當日用左37分鐘答１２粒波子，差７分鐘才合格。& m) g+ Q. T6 C$ U0 q
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:/ }, ], A1 Z2 i: C

' C0 u/ w: X0 f# |' ~, I' U6 K我以前畫左個chart去答,
) G" s+ ?$ L3 F! x* O等我搵下...

4 D1 N4 |: j% \- Q6 s3 _
/ ?; B* i( ~( l! E, k1 {8 {8 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:& J* f& R4 k  ]  W  @2 H% S
唔識隱藏...已經諗到..

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2 B9 Y  Q1 K- X, Y" a) C) W, tsor !!!....e加改左7 O  _: `1 U, F7 X
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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6 ~) h/ e2 C8 W8 _6 e

1 @, S# O2 f$ p( m4 y[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:$ a+ q0 j9 V- L6 l5 y/ F
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.# n+ y5 G& `' N8 G0 g( `

5 O$ x5 `$ Q+ c; n3 _Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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6 _9 Z5 t- d8 N" ~2 wPlayPlay, Let me know later who has the right answer and I will add points accordingly./ S) ?: R* H( i

2 C! X( N+ X& C- ^" y; zThanks

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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

1.6 C- F% m( |3 B
1-6 vs 7-12
. K; v$ c  u8 G! pif 1-6 = 7-12     13 is fake6 e, U. ^* Y3 \9 g7 O
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if not
6 q0 m; `, o# K3 ~5 t& N1 }/ k" E# V2 _. G# X# g9 j& N
Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 0 E# `; H6 `" j7 s1 L8 `3 T

2 [- G+ @( k: ^. t$ U: uThen Weight the Third, ]. A6 z/ b" D3 l3 i
3.2 e+ j9 E5 m- o0 U
4 ~- j2 A+ l+ Q$ c; t* P4 z
Suppose 4-6 > 1-3
  G: e8 e; G- Z# @- U) ]/ Z  }$ M- e, C% ]# x; {' B
Just like the first Step
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/ W- f. S' L) K; j- I9 B4 vs 5 2 w9 t% u; K5 A4 l6 ?

% `6 A) [$ `7 q' u6 Vif 4=5 6 is the fake one ; Q; s6 U1 J; o: x* C; I0 x# D

4 N9 p; R8 J, a4 qif 4>5  4 is the fake one / T7 }* J; l4 A$ b3 F6 h

4 o4 a# f) [5 N0 mand so on......................

hello1997

分3組4隻波子秤
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& }+ T! B" @. j: CGroup A: 1,2,3,46 p3 v2 H# o4 Z9 |3 v4 p( E( a
Group B: 5,6,7,8
# c0 J/ Y& w+ y" ~' A. L# a& k( [: b& tGroup C: 9,10,11,125 k  f& {7 e8 e; |  v/ u% `
Group D: 13
9 }7 s+ T- V, O, y( A& r- W3 u2 s% r+ p
Round 1
5 ]& T8 ]. w1 ?  B# E! RGroup A vs Group B- X* B- P! @& T# I$ q$ i6 ?" ^
如A and B一樣, 即較輕一粒在Group C or D  }9 e# `* x, |6 j- p. _, {
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Round 2. d  G6 ~2 k! a8 S& @3 L7 w
再在Group C拆成:
( i4 I! }6 e; L4 [5 L0 [  {Group Ca: 9,10$ c" W4 N6 }) i: r" i
Group Cb: 11,12
2 I1 v; ^5 A8 M: V2 {0 B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, ; ^$ W( y+ Y# I2 {
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
$ c5 e2 \' e! W6 j; ]Round 1: S8 w8 z5 g7 I, S# Z$ J1 @
1,2,3,4 vs 5,6,7,8 = equal7 Q- h7 ]  G" w( z8 Q0 I$ F/ `
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Round 22 b5 M. `# A" N9 @9 k# Q) j$ h
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
' h% U) V8 F6 z4 W9 v* `: j0 Z9 vs 10 = 9 > 103 c" E& C7 Z2 D3 [) D! ]

$ L6 |* `* O9 j2 {9 {' [  ?0 \+ ~, fThe answer is 10." Z9 x7 s: C0 H/ [
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e.g. #2 假設7為較輕的一粒
2 T5 R7 D9 \( p# P: [Round 12 x1 G* O; u3 Q0 \0 {7 H+ q
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 22 o" b5 j1 C/ f+ E* O' o
5,6 vs 7,8 = 5,6 > 7,8
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Round 34 ]$ D' t/ E8 ]
7 vs 8 = 7 < 8
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The answer is 7." D0 n' S+ b" |

* J  n" P& P  M; T' \3 ce.g. #3 假設13為較輕的一粒( y8 ?* b( G. d1 S% f$ F7 |
Round 1
7 f" l8 v+ p; t& U6 l$ D1,2,3,4 vs 5,6,7,8 = equal
3 F2 `( y% @3 j0 T. `8 a' L; ~  Q- m/ I& W: |  X
Round 2
2 o4 I/ p; S- |3 j5 X9,10 vs 11,12 = equal
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$ W$ e! Q, g" o0 BNo Round 31 X6 @# }' I! p1 y0 \" {5 ~

4 O+ z& Y5 [: A. A2 T( ^The answer is 13.) K/ I5 K3 ^0 O7 Z1 d6 e' S  ~
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唔知我答得正唔正確呢?! * S' P1 ]/ O: }1 T

/ m3 R, n2 J3 A" x2 Q% ?[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:7 g6 Q+ N, b8 i+ E
1.
! E4 h4 Y* f  M. B. p1-6 vs 7-12, c4 V- Z* v8 G; x4 c: {
if 1-6 = 7-12     13 is fake
  g$ }' n! h: d! h( O2 S; Z3 x' z9 |+ x7 L$ |4 ^
if not 8 N( s" S. G' R3 Z$ Z+ J+ o

& Z4 ^" I% x. B. _Weight the 2 time 8 X8 p" J$ @% A' c& Z

+ L6 K! j. Y+ N% rSuppose 1-6> 7-12
2 i! z$ B) P( O, I# V$ D0 i) l7 e! a- P4 j: Y/ O+ f
1-3 vs 4-6
0 ], W# D5 L- P0 u) j+ _+ `) `! k  D, C& X8 g- V5 k& i3 T
Then Weight the Third
0 i( b$ ?! k2 ^) v+ `- [& D3.6 u. s  f0 x+ o2 z* l$ \

) u* Y$ f  R7 CSuppose 4-6 > 1-3
8 A6 J- P0 f6 W1 |8 |1 K) E  m) d6 C" V4 J' ?
Just like the first Step
" ]2 @6 H' u9 @8 j1 l0 Y, [' g/ d/ E8 W" ], ~' `
4 vs 5 + Y+ f: B3 W* {* }: I1 b" w8 y

% }  n2 v7 {5 o% v2 lif 4=5 6 is the fake one
1 e4 r0 @5 y! w; `( Y
# e6 h, c5 W$ |if 4>5  4 is the fake one
+ Q/ v) N  M7 _& f- Jand so on......................

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& B% t: _0 B4 n, Y, I/ Z
# G, J1 `6 w6 I/ w/ s9 V問題第二步/ L/ m5 G! G! |/ h
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Weight 1:  1-6> 7-127 M6 r* a( @, J, N

! b" }' A# A7 Q% {8 `* KWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6% r1 y9 G) q) W

/ H, E* F' l$ ~% ^) M( i你第三步点去搵 7-12 边一粒???
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; ^* v# d& C. [; V  G* Q: d. O========================================
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' M+ F  }4 p# y6 c問題第三步% e7 I/ C' U$ Y" H) a  H5 v
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Weight 1:  1-6> 7-12
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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