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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$ R3 C2 G; L/ O: U# M. v; ^3 _『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)。
; _1 @6 B! E3 g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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0 {9 w: s8 o: d5 k; J3 H, p  m1. 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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/ e' x+ j& a$ c3 G7 ^6 v0 J2. 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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$ h7 S$ k8 Y5 b* n[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ \" v2 y/ |) m% _4 O  c- r
相信e條題目都有吾少人玩...

: R: l0 F8 a2 q9 z7 ^. a6 N我以前畫左個chart去答,3 h% x& F( N5 i+ p$ r( O) d
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。
! F4 Q) R" W' f% @5 L: O13.........
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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:3 J9 }- o, l8 c
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我以前畫左個chart去答,
- x4 x* b5 V: w- f等我搵下...

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! L/ |4 b- \( r5 H( X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:+ C8 S" A7 ~  Q' F# }/ p- M- {7 [# O" |
唔識隱藏...已經諗到..

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sor !!!....e加改左6 ^5 \5 a( Y1 A
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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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) v* p" l" n$ E. m7 ][ 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! B. l  @% M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., b5 f* _& y" k+ P1 Q4 q- ~
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 u$ i0 Z. T' N+ j! l$ R

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.6 [( K+ a$ a* ]4 E

& I) R+ {+ b; Q0 rThanks

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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

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1-6 vs 7-12
8 R' T4 h: ]! V8 F% k3 Bif 1-6 = 7-12     13 is fake9 z% z! J) k) l0 r/ S

4 m- h1 d. n* cif 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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/ P6 X$ {; c8 }: a( _, [Then Weight the Third4 Y3 j' m) c" r+ U) \+ O, U
3.
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3 i7 h2 m. ~/ A( DSuppose 4-6 > 1-3, @  f: e, W9 L  K* u' s
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one , _2 Q  U- B  C& ]

1 @5 @  t( i7 ?, c- o6 T% S! @8 j" Iif 4>5  4 is the fake one
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5 x/ Y" ?8 n& v- m# S, g6 x# }and so on......................

hello1997

分3組4隻波子秤: h# ^. _0 h# x: M; a# w

. x( G; }9 V& |0 J3 S; R) JGroup A: 1,2,3,4
4 [" q# S0 T# C+ SGroup B: 5,6,7,8
8 M6 p0 e% S& ]5 I# W; rGroup C: 9,10,11,12
: [$ J' |$ l3 q/ s/ uGroup D: 13% Z8 f' S2 ]8 X

8 [  z: Z& m2 g9 eRound 1
3 U4 g7 ?8 ?5 dGroup A vs Group B
/ C1 m; G' c4 i$ ?8 p2 h- n如A and B一樣, 即較輕一粒在Group C or D
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Round 2
# [9 V- g0 Q+ y0 n再在Group C拆成:
1 f$ l% v( i$ G* }- K* Z) yGroup Ca: 9,10
1 K4 X- U1 g' aGroup Cb: 11,12) w5 Q4 m9 M2 [
然後再秤, 如一樣, 即13為較輕一粒.0 e! ~1 e. `8 r+ d
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如不同, 即較輕一組有一粒較輕波子在其中,
1 G" a: C) [  q& r. x8 ^8 Y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
+ e8 ^9 S# c. Z8 JRound 1  P3 d; K9 b$ c9 I
1,2,3,4 vs 5,6,7,8 = equal
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' \- Y6 @. k) {7 {* b# @Round 2
0 ~% r1 j5 {  v8 \5 O/ h9,10 vs 11,12 = 9,10 < 11,12; _) c$ A/ n: `! [8 z0 O
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Round 3) K; Q' Q( q' n  \" t
9 vs 10 = 9 > 105 Q1 f( h* o0 |8 Q3 I$ s

# K: E( U8 j% a- pThe answer is 10.' G8 F9 _; J& }* y6 f& L6 H
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e.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* Y( \$ f+ e) P9 t# i4 |- L
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Round 2
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, \  q# v/ K9 r  x& x+ ]7 [Round 34 v8 a2 d6 i! v/ a  w
7 vs 8 = 7 < 8
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: s8 I2 c1 q  y7 {2 l6 X3 mThe answer is 7.# N# x- x( Y0 G7 ]3 V" i/ C( M" f

: l% k- t2 J# i  H9 D, Y+ Je.g. #3 假設13為較輕的一粒  q* L, p/ @' N! T0 m. p5 [8 U
Round 1, I0 c( `$ J  D7 K9 g6 M( v9 x
1,2,3,4 vs 5,6,7,8 = equal9 ~, O9 H7 ~" x  t8 w
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Round 2
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( F" i- N: y# P! Q. ZNo Round 3/ M! j6 V& I+ M) B* f
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The answer is 13.
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7 Z4 S, G, A) ?% S7 W: Y3 J# ~$ @唔知我答得正唔正確呢?!
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1 M) K- A2 k) K+ Z+ L, y& Z' T5 D[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:4 Y# ]0 u+ T: i1 Y: t6 s. k
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1-6 vs 7-123 {$ k0 k- e; X/ q# o
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time & y: C& B! c. K5 C& F' K( A8 l$ |
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Suppose 1-6> 7-12
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! N! x; t. x# H$ D2 t  G1-3 vs 4-6
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* H9 w( _/ x* VThen Weight the Third. R) k/ u$ k. K+ ^! K7 V! m* \
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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0 |! G1 N8 D; j/ \5 ?! I7 |6 ^4 vs 5 4 _7 Q* t% t4 k. v. G
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if 4=5 6 is the fake one 4 m" g0 D2 B2 o, u
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if 4>5  4 is the fake one / H$ Y; }8 O( N4 ^, \
and so on......................

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問題第二步0 [7 D. \; k3 p6 k8 ]) e

0 t; N9 ?: A; V0 g& o2 HWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ B- T1 r' b- M" j

, r  L: a  J) ]- f1 U/ q你第三步点去搵 7-12 边一粒???
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問題第三步( G9 D  g* S* i. a4 H8 v

7 A7 Q# j' C* e% ~4 g& FWeight 1:  1-6> 7-12
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6 s& }! t% S, i* I# HWeight 2:  4-6 > 1-3   j7 p& n5 F4 D

* Q- _: Y  N0 `9 B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