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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『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)。
, r  r1 m/ u& j7 s# M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？』9 N" H7 _8 A3 r
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注意: 2 x4 Y5 S- A, Z; b
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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& T( j5 P5 M6 g- p3 \- b3 a/ N; }& u
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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:
, I- `  Y: m7 ?5 b5 F0 N" [7 d相信e條題目都有吾少人玩...

7 B' i! t5 R: @/ o4 \) x% S我以前畫左個chart去答,+ ~1 S9 {  M/ d) z; U
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。) i  f7 l0 z, d
13.........
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/ p+ F$ `* Z+ s2 r: _2 E0 ~[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:. d, I; ], z$ b! L$ `  p

- ^) p4 i+ |3 v, k+ m我以前畫左個chart去答,4 E0 M0 X' y, T& 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:
2 D7 u/ G1 g. ]唔識隱藏...已經諗到..

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) ^5 }8 D7 G6 K# {. Z$ V# osor !!!....e加改左
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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:
% f0 j! }* S3 R; F9 U. Q$ V( K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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PlayPlay, Let me know later who has the right answer and I will add points accordingly.1 Z; ^2 y2 y+ \2 ]& A
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Thanks

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7 H7 `7 w- h8 n0 B" A4 n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) c/ E3 V+ e, j, F% C0 U2 A
1-6 vs 7-124 d" ^  p4 `8 R# X" E; l/ {& X5 ~& o
if 1-6 = 7-12     13 is fake
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6 R- f+ z0 n* \: ^0 MWeight the 2 time
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& ?; w( ~( S8 I" @( `( `Suppose 1-6> 7-12
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8 n+ X. j6 v- L- ~8 {# t, `$ R1-3 vs 4-6 * b$ F* _9 `8 f2 V

9 \# o) X/ D$ j; G' {& fThen Weight the Third* J2 x3 ^7 ]; S' X3 j
3.
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Suppose 4-6 > 1-37 c' O# y2 E0 U. _! W) w

6 g7 |5 d. h. u, xJust like the first Step% Z0 O$ }* j% P7 b9 d4 F* e$ @0 S
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4 vs 5
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if 4=5 6 is the fake one . y& T$ H/ k0 ^5 N+ n6 Z) M/ ~

5 _! n2 y. T: i6 d' Q( Tif 4>5  4 is the fake one
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$ M9 t) s( M! H+ @% U5 ~) Jand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4  n# _5 V, F9 }9 W/ I
Group B: 5,6,7,80 \. U7 E. e; H
Group C: 9,10,11,128 A9 d0 |) y) ^$ r& L$ D. y
Group D: 139 k( L. [# o/ F: b7 ^, X, A

9 Q1 v, S7 u7 E% A, ~' k- e2 n  }Round 10 c/ W  n$ ?; q7 G
Group A vs Group B; }& G6 O% D. o" V7 X2 ^
如A and B一樣, 即較輕一粒在Group C or D
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  }+ _7 t6 v; s' t  s/ Y- z3 RRound 2
) t+ E: j; n, x6 [7 Q) u. u/ z+ w再在Group C拆成:! ^( A# ]1 }, P' }6 J& x
Group Ca: 9,10
7 d" ~" M! o) {5 vGroup Cb: 11,12
% I( X* s' }4 I1 R2 P8 @6 b* v* [然後再秤, 如一樣, 即13為較輕一粒.+ Q7 o6 b! W$ s5 o1 W5 P. h) W2 r

: e1 m8 b. j9 X  K; r* {& T如不同, 即較輕一組有一粒較輕波子在其中, , ~5 @0 }1 Z/ v9 I
要再秤, Round 3, 之後便知答案.
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8 N5 I, J& T" ~( ve.g. #1 假設10為較輕的一粒6 ?: o; V' j* }1 Z9 e7 t
Round 1, ]9 |( S: @# \  `% v: W. D* e
1,2,3,4 vs 5,6,7,8 = equal
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Round 2$ X  @6 ~7 j4 y; t2 v; ]/ v2 V
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
! J. b  ]) M& h( ]( @9 vs 10 = 9 > 10+ S, `, j  H" |0 F

: h0 V9 y+ E, a3 C5 Q# UThe answer is 10." C5 O- k1 U3 E* P* }

2 z2 Z+ b$ r5 A5 `9 U+ E2 Ie.g. #2 假設7為較輕的一粒! t# z4 L5 j, j: H' L% L
Round 1
0 R1 ]! [, e8 e. r7 I0 [1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# b+ V4 v% @3 S! G+ e* I; s8 I
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Round 26 b! x! R% q/ s; v) R+ ~7 \% @
5,6 vs 7,8 = 5,6 > 7,8
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: S+ b  A7 ^9 P0 T( yRound 3
! N7 n% `1 G# M0 m$ M# ^& D, `7 vs 8 = 7 < 8* u, W& ^9 C5 d1 Y
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
8 b+ R; T- G3 M1 K& s, y+ J# }4 uRound 1  ?, o7 S( R/ h& L7 i
1,2,3,4 vs 5,6,7,8 = equal
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1 }/ P7 u/ s4 q( {5 @Round 2) J# P6 ~( j6 l) B. {8 Q4 }) @
9,10 vs 11,12 = equal
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- a1 c2 J: v3 C$ }- ^) VNo Round 3
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The answer is 13.
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+ v5 q% D3 v1 Q3 `) R8 I% w3 m唔知我答得正唔正確呢?! - v& D1 M& T( R/ X) g% z1 ~. a& M
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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:2 I; g( Y) X& ]4 t
1.
$ `' Q' K6 D1 Y0 _& \8 ^: o! a2 Y1-6 vs 7-120 ]: @* ]( F+ a$ h- p
if 1-6 = 7-12     13 is fake9 \' `' z- u# ]5 s" e7 Y6 D
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if not 5 G9 l, e/ x% c& V
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Weight the 2 time : s% r/ x& `3 P3 y' f$ b. a* [7 R9 \3 |

  E) @+ ~  R# l4 BSuppose 1-6> 7-120 w: D3 N8 G3 s' n' c
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1-3 vs 4-6 - t; q9 [; Y- m- J
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step# f  z3 L) ?1 K8 O- H" j  M

3 e% e# A; J; M8 \0 z9 J6 i5 B( [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
+ U8 m/ U1 q9 h, ^and so on......................

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問題第二步
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8 C/ C3 h7 A: M1 Y5 [5 x6 b1 m" QWeight 1:  1-6> 7-12* @$ k% _3 @. M
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ q! q" J6 J* L1 o' S4 U

- D, S2 c# k# O9 ?你第三步点去搵 7-12 边一粒???3 J" X; }( x: q# @) P
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========================================
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! f  l- w* R0 G. Q  ], d, W問題第三步
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9 F# |8 U* F6 PWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 ( b: P6 x/ y9 u9 L% S' P8 B
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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