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)。, E" k' D7 D$ x& l8 @
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？』
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注意:
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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5 o  B* r' z; D7 W7 `- k6 ]

  T  l- j+ C3 Q: w2 @' Q( @8 q* L2. 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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& x9 i9 X, {9 D7 e% O( M6 z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:, N4 W9 t) {, K! x) M/ \! y, F4 d
相信e條題目都有吾少人玩...

; ^6 @9 [9 o- }5 }8 `- X* D我以前畫左個chart去答,# T9 [- q4 P" t9 }+ i3 t# p6 P6 a% j6 Y
等我搵下仲在吾在7 j' P1 M' I6 K; q! [+ W

8 [% I& h* t8 e4 M" X0 t1 C* X當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ X6 E/ A  G7 D1 Q1 ?" L13.........+ Q; i: b1 J4 S! Y, Q

# Y$ @2 p3 z: V& _; K[ 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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/ j9 d; z4 ~. v! O; y: c我以前畫左個chart去答,6 N5 C. P2 T; b: ^1 }
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:; i4 H1 W) v! v" ^, ]5 G
唔識隱藏...已經諗到..

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% A4 ?* ]. ^8 N3 b& v6 Osor !!!....e加改左& }1 @9 |9 \- L! r
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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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. z0 B* U  m+ G" z& E* e0 S* v3 P0 o  o[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:1 ^# x( m- N) ]% }6 W2 s0 k
相信e條題目都有吾少人玩...

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9 {$ X' _1 q) v' g6 a( o/ `, qPlayPlay, 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.# z4 l9 s4 F& c3 b! ]$ a7 A

( c, M7 x# z: S8 n: W& {2 JThanks

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' M6 x- X& l4 X+ e. P( S7 m不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
% Q3 Z$ v# z* B( W" [  u. I7 x* Tif 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
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( y) B  l: P8 H) {& o) P. h1-3 vs 4-6
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. y  n( H% G- U4 f1 [; eThen Weight the Third
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  E. O! [1 d& z8 j' ySuppose 4-6 > 1-3% F5 q6 S$ U1 m; J" X8 o7 r( R1 \( Y

+ I+ m( A, y, M: T, QJust like the first Step
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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
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$ D0 Y6 E3 g- N4 Mand so on......................

hello1997

分3組4隻波子秤
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3 K* G3 m* @5 d+ {Group A: 1,2,3,4
4 K! K5 q5 V2 y3 X8 |% pGroup B: 5,6,7,8/ S0 B; n+ n2 Q1 m/ s
Group C: 9,10,11,12
. [. _9 ~& Z: N( X2 OGroup D: 13& G! [' r" @0 B. K3 Z/ V0 F- J
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Round 1) n( v8 L0 W/ Y3 z, ?
Group A vs Group B
1 p+ w% t1 a/ Q4 ~3 i如A and B一樣, 即較輕一粒在Group C or D
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& z* e3 i4 ?( N) A& q4 ORound 2
  O% S4 f" {' N; D% p3 Q再在Group C拆成:
4 Y9 ]% X! _2 x# Y1 GGroup Ca: 9,108 ~! }' e* W! V4 Q" A3 V
Group Cb: 11,12
; H2 \  p1 \: z" b* y- w+ N* }' L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,
6 X$ O7 H; }- |, P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2 W7 j" @* m$ g1 o& ^: e( Y
Round 1! |# O! x! l$ L
1,2,3,4 vs 5,6,7,8 = equal
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& a- r% @. o$ I$ R2 D# ?9 d; ^  bRound 2
8 i/ j6 L+ X$ z9,10 vs 11,12 = 9,10 < 11,126 n( Y' u. a" o6 ~% f" @  y8 C. h3 I0 _
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Round 32 P$ ^" y) U4 A! w' ~
9 vs 10 = 9 > 10- H: O( h; Y( |& O( F
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The answer is 10.( J6 _/ Z0 h* `* e) Q

# R# T# ]( U, N8 Ve.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: |" H/ M& a8 X  a5 j

, B1 ?$ M$ J( C% b5 gRound 2
/ w. k! T  b8 h9 j5,6 vs 7,8 = 5,6 > 7,8! V  E6 T/ v8 [! y% s
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Round 3) \( U' i! Q( c! T
7 vs 8 = 7 < 8
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4 y9 l; h7 U, uThe answer is 7.
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e.g. #3 假設13為較輕的一粒
( C% t8 l% x& s7 l* q$ WRound 10 ^5 y* Y7 o! m$ r
1,2,3,4 vs 5,6,7,8 = equal/ k5 R8 \, p1 p7 W
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Round 2; [' K9 }4 d! U. \8 {" O
9,10 vs 11,12 = equal* b- L; z% t. U0 ~

! r/ [' i3 w# p/ aNo Round 3
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The answer is 13.) M; s  X5 ^3 o0 C

& x* q* [0 d; S2 d2 L) }) h唔知我答得正唔正確呢?!
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6 u9 q: g3 }4 I" t8 I; b9 Z[ 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 7-120 f$ Q' {- m: Q$ K1 c. [8 Q& F
if 1-6 = 7-12     13 is fake# _/ w( p3 A0 E5 }6 N
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if not
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% y& s# S4 Z% v0 {; c% uWeight the 2 time ! ]$ D3 L) L; O, O% h
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Suppose 1-6> 7-12
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1-3 vs 4-6 3 j9 \4 x+ t4 }! q+ d

/ P0 z, Q  N$ j1 ?$ ]/ MThen Weight the Third% f' r: H4 w6 _; I. S2 ]5 K
3.
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Suppose 4-6 > 1-3
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9 }  h3 w. |# R! YJust like the first Step8 }  R+ B: E! v8 J7 r/ C: W. W& N
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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
' b1 r4 O' b" |* k- x& ?and so on......................

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4 O# I/ O5 M$ P% R0 V0 r問題第二步
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2 j+ L0 T$ G8 P' A8 S( |! dWeight 1:  1-6> 7-129 ~, _" T, m2 B  t- y2 Z- y

' S  R, e# q, n9 ]; g& I# jWeight 2:  1-3 vs 4-6 , if 1-3 = 4-66 h0 _; ?  U2 X) S  i! K& N; \7 K
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你第三步点去搵 7-12 边一粒???5 O% `0 G# q+ K, m8 D
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3 C, Q6 j* Z- L" ~+ K! ?. {+ c2 X問題第三步6 @5 F  J9 {6 k, N# u6 z

+ b5 Q! w8 a0 f: A4 C3 hWeight 1:  1-6> 7-123 Q0 x9 O3 d! o

  z$ F& e* K) N4 v6 O' x; c7 EWeight 2:  4-6 > 1-3 8 L! ~0 D9 A9 n5 u! m' }8 a% W

0 n9 `; }6 X* i0 o0 _, |: y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