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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5 Z( M( D, i3 k『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)。
: V, g. i( D# h# J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: * i1 u& F7 d2 G9 U6 ]
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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! U; x) K0 j  i+ l( r7 V6 d
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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- n8 y. J& N8 ~0 I
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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  s# h+ K" K! X3 v( K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,
& }- A: @4 u6 n5 F8 a9 b) L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。
+ q: U1 ~3 F! Z& r  J- |* \$ t13.........
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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:6 s- p( Q% s% Q" ~6 y1 P8 v
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我以前畫左個chart去答,
/ C5 M0 G; K, q0 l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:
+ ]& ]1 N( a% ?' E唔識隱藏...已經諗到..

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: [8 E+ y3 C- M( y) Fsor !!!....e加改左0 }# D! r- K4 }& j3 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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% l. W4 S7 m: D" w% `) ~$ L[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:% i2 b2 C6 H+ I- C9 U6 w/ F3 w4 Z
相信e條題目都有吾少人玩...

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* J1 W  Q  z" e+ B; X* d2 oPlayPlay, 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./ L! m' C, n% a$ p
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Thanks

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) [6 C6 x1 Q1 R$ C4 A不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
3 `! f% i$ J& V, e1-6 vs 7-12
6 r% [0 Q' Q* mif 1-6 = 7-12     13 is fake7 H, j- C5 A% [( o, Q! Y
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if not
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Weight the 2 time # R' @' e' k7 a; }

4 E% r) g$ w. k( ~+ x1 ?Suppose 1-6> 7-12* {) }* U! `; o+ V! b: k3 L

3 |# C# R! x1 z0 D1 W1 i1-3 vs 4-6
  h: X7 F7 F( P, F$ k1 O- q. Q& c  }9 U. o
Then Weight the Third! Y* C* F' [1 B& ~1 _$ O* t4 @" f1 V
3.
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Suppose 4-6 > 1-38 d' {. [8 |1 X8 g+ o" _" d  T: H
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Just like the first Step+ o2 c0 f' ]( R& g& a" a

; s+ K, W: R9 P# f+ f- l4 vs 5 ; G% \$ S2 D) b  t! x( _

6 k0 [5 D7 ]0 L# I% Fif 4=5 6 is the fake one
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! U, Q# T2 q- Q+ y" oif 4>5  4 is the fake one ( S# C' u! K  J9 `6 O: M$ M' c
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
3 x0 m* o- H" v( GGroup B: 5,6,7,8
& I  R5 i8 q. h" n1 W+ Z2 wGroup C: 9,10,11,129 t  B8 V' `; G5 T
Group D: 13% Q/ i2 m! A- P) W5 |: S
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Round 1
9 c  y4 j7 H, h* w9 c0 _+ ZGroup A vs Group B
, J& h2 G4 K1 j/ Y如A and B一樣, 即較輕一粒在Group C or D
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Round 2
2 D( x9 E" |+ h0 b; p再在Group C拆成:
( H/ C: _" m% z7 j# N# HGroup Ca: 9,102 X; r0 t* r% G* |! d
Group Cb: 11,12( M. }& g0 ]9 Q4 G$ X
然後再秤, 如一樣, 即13為較輕一粒.* g; W$ D& l0 K1 I4 G

% z/ b- W/ ]5 i( a如不同, 即較輕一組有一粒較輕波子在其中,
& Y! r% j* S0 k" m: f- ^要再秤, Round 3, 之後便知答案./ H1 ?" v2 _. B& N5 R3 I/ \

% M+ f4 h! S( L* U" ve.g. #1 假設10為較輕的一粒
; w, V5 q8 t- e6 ^4 b) E) V1 `Round 1
; N; y1 ~7 ~! ?& W# y+ G1,2,3,4 vs 5,6,7,8 = equal  \; H% j; A6 q  g5 k
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Round 26 b6 n. j1 t0 V. H6 W
9,10 vs 11,12 = 9,10 < 11,120 x  A2 Z; ?: }! R& R0 K8 T

: H2 D9 M$ g& {, lRound 3
' {  L' E3 ^6 k& h0 P9 vs 10 = 9 > 10$ A* a. h8 u  L( D

# j' n/ u3 I% ^8 l9 b& bThe answer is 10.+ j' R2 S  ]6 L; W2 t9 m4 F6 b

: J6 ~1 Y/ J9 c9 H5 A, \! ve.g. #2 假設7為較輕的一粒
" Y- f( h9 d% U) X- ?2 p* V- _" mRound 1$ y6 O6 J3 B, l8 c4 g4 a
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,80 h/ [! |7 }2 q0 T6 f; T

( W! Q1 [5 _$ x4 j8 H2 BRound 2
1 `) t. b. }7 J5,6 vs 7,8 = 5,6 > 7,8
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% B8 ~( ^. `( t* C* ]Round 3
9 `7 v2 M+ `5 [6 i0 L' ^% t& u1 ]7 vs 8 = 7 < 8
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! h# e* P# w( F9 V  N$ a. DThe answer is 7.4 W" S, \' J8 i
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e.g. #3 假設13為較輕的一粒6 h8 k% Z2 _5 M" X; v. P
Round 1
1 m% V/ F) I9 E2 r* l# B1,2,3,4 vs 5,6,7,8 = equal
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Round 2
. H$ I3 z( m8 C9 }. t( g9,10 vs 11,12 = equal
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; c; F8 |! d+ U$ l# b; QNo Round 3
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The answer is 13.* X8 N/ f. _# t2 h5 t

! B$ n) t" ^& g" b9 X唔知我答得正唔正確呢?!
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1 \1 O. X( \. h) ^[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:' J; ~. z' j5 R; b
1.
/ S) Y2 L2 G3 v. c/ Y$ G+ O2 N1-6 vs 7-12
  O# @( X- i% oif 1-6 = 7-12     13 is fake" s0 [; l% i% Y+ m6 i4 Z- R

1 O. v' {4 R+ V0 ^if not
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third" C! ]) y5 R- I0 s8 h: W3 V
3.
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( p2 b) `8 ~0 o  PSuppose 4-6 > 1-3
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: l3 H/ j) z4 R# Y% |3 q6 FJust like the first Step# h8 E9 q; n" z3 l' W9 {

4 c" _* K+ y( |* B# [) w4 vs 5
! }& ?! W3 a, w8 R% _
9 x" u3 h$ N- Oif 4=5 6 is the fake one 7 h; x% |/ w4 X% `! A

9 H) i/ a( g; z5 ?0 ]3 \# S; Q. Pif 4>5  4 is the fake one $ Q. K& _( z! O( z* ^8 \  Y
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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) P1 z; m  @- O9 Z! ]& ~+ [Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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( |+ @; w# `; G8 X/ y( y你第三步点去搵 7-12 边一粒???6 z1 E: ~6 f0 W' `# w% |

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7 y6 V: G! r& e4 [# m問題第三步
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) C, f6 s8 d" qWeight 1:  1-6> 7-12! ]: ]5 A. x; m9 B7 k4 T
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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