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)。% |) ~, g- y# ]( I
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？』7 x4 G" D& {$ G& j" O

  R. v" a4 [6 `' `3 g- t注意:
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$ {8 d% Z, X$ _. K1. 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9 u1 b- J' k+ t9 n2 c# q" {- F8 P1 \& J
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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 21:34:8 v. j. m+ h4 r$ K# m: H8 r9 n1 s. |
相信e條題目都有吾少人玩...

+ Y1 x1 J9 R1 C8 @( _6 ^2 c我以前畫左個chart去答,
. K6 C7 o% ]* D- Z" \* `- _- f等我搵下仲在吾在
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5 H! Q$ ]: j8 y& ?7 b! Y當日用左37分鐘答１２粒波子，差７分鐘才合格。% v5 x; Q' K+ q5 v
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:& D6 q0 h0 c7 l" {5 v

: x6 a/ m2 _, G& l我以前畫左個chart去答,
* ]; T. F: W: ?" J/ H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:
+ a' S* c1 N1 W唔識隱藏...已經諗到..

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& A/ ?) ?- {% T+ m" H+ e; h. Ysor !!!....e加改左
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# i7 h2 ]% K6 b7 h! S4 g* r2. 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/ j0 i" P. B# e+ [4 H) b  b- C6 ?
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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:- S; B% \' U7 s2 G
相信e條題目都有吾少人玩...

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! M! ?$ T: U  p+ T9 E) A4 M: pPlayPlay, 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:; F9 Q% C4 C2 K/ i: W5 ^: x& O

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4 o2 k2 K, j0 b1 W) ^) _PlayPlay, Let me know later who has the right answer and I will add points accordingly.: \# K, v3 C, H' X% X' f

* L, m% Y) o6 E; N+ i! x1 k4 ^! M/ EThanks

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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/ k5 L" i) x3 s+ k' ^
if 1-6 = 7-12     13 is fake
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if not ) V; v3 C; N; W4 H0 [8 q

, A) K: h2 I; ^+ S0 uWeight the 2 time 1 t3 ]9 F) W1 k" D4 F1 h
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Suppose 1-6> 7-12( }1 O3 e+ S: w, Z5 D7 s  o& H9 R

2 a, o! d/ z5 K4 I1-3 vs 4-6
0 Y) M. E; p$ C
9 N9 m2 j# w" G* f* s0 yThen Weight the Third- Z* V9 ~9 C! R8 y3 r
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Suppose 4-6 > 1-3# w$ G  w6 V3 h* F

) d; ?( T2 @9 ]2 qJust like the first Step. s/ L, T; r* L6 p, |! U/ s! F. q
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4 vs 5 # l  B5 k7 x  f+ L/ E4 W: I1 F
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if 4=5 6 is the fake one & u) }: T& C/ m% G$ j
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if 4>5  4 is the fake one 8 g, r4 G. L" d  }' B: E1 b
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and so on......................

hello1997

分3組4隻波子秤# K7 I3 @$ |  a7 s7 {+ u! \) {: m+ J
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Group A: 1,2,3,4! ]: A6 v% l4 F& B
Group B: 5,6,7,87 c5 Y0 a  \6 @4 j. N; {' Q3 J
Group C: 9,10,11,12
/ m$ h/ C6 q0 ~1 s& gGroup D: 13' N% T- l# I, ]- u- P
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Round 1! P0 O) b3 d4 S  c; b
Group A vs Group B
# ~. Q" P9 G+ `2 f( p! W如A and B一樣, 即較輕一粒在Group C or D
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Round 2
' w1 Q6 Q! w# W4 Z. s" y# N  M再在Group C拆成:
( y' e( v6 ]/ D9 P' g1 _4 |Group Ca: 9,10
' M* K! q; r) Y; l  n5 Y) w, d" G2 QGroup Cb: 11,12
! t) }; a' {2 j6 j/ u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,
! a* y$ f2 E) z要再秤, Round 3, 之後便知答案.7 d8 N3 |. w2 m& w1 v
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e.g. #1 假設10為較輕的一粒3 l1 {- S* G& O) V/ `8 U
Round 1
0 _! X- V" F0 R7 Y, @( Y$ G1,2,3,4 vs 5,6,7,8 = equal# ~. U1 |: I1 ^7 X+ J
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Round 2
- j1 Q6 \" h! c9,10 vs 11,12 = 9,10 < 11,12
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3 t( z) v# o- S8 c. ]$ nRound 3
7 [8 o1 ^' P3 Z. E& a; r% x9 vs 10 = 9 > 106 O: K* O; j8 q$ V+ X7 q! l. Y
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The answer is 10.
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. ^+ A7 l# Q9 o4 Q% W8 d0 @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
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Round 2
- z8 q; e2 k/ s" m5,6 vs 7,8 = 5,6 > 7,8
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Round 3; v- R7 O+ _8 F
7 vs 8 = 7 < 8' ^4 l8 Z5 N8 P0 W% S$ o& h/ m
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The answer is 7.+ E$ D9 e# N+ c" q. k% D

7 |9 |; M! o' r, `e.g. #3 假設13為較輕的一粒  W! R& }; q& r0 q) Y
Round 1
8 ]9 h  M& `- p- X0 w1,2,3,4 vs 5,6,7,8 = equal
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Round 28 Y( r* {& [7 p& \  g
9,10 vs 11,12 = equal4 ^5 A( ^( n( F% S- ^5 H# `

" l7 @6 v5 ?" b  m" G, I9 ]' MNo Round 3* Y3 x( [1 c( T/ u7 q
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The answer is 13.
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6 D2 ]% z. z0 V9 }唔知我答得正唔正確呢?! 7 r" ~0 h9 _6 [) h
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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:
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  A4 F0 z0 d, k7 D: i& w3 d1-6 vs 7-125 N+ P: N! P! ~& A9 X; P' e& i
if 1-6 = 7-12     13 is fake1 r2 g, E& C9 W1 h

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Weight the 2 time
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Suppose 1-6> 7-12) X3 h: U$ t0 J. u  b# H0 k

7 q! i& R( z. _& s; _* ]1-3 vs 4-6
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) |/ N1 c+ ~. y/ ^! Q8 b/ vThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step' I7 l$ m2 |& z! v
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4 vs 5 9 u- y/ t/ U  \- I/ }

% q2 I( t5 r' ~4 Z( |if 4=5 6 is the fake one 2 }: H: D( y& k0 x* i

' D; [, }: ~  M4 Kif 4>5  4 is the fake one
' R& V. o8 M: m& T9 o0 Y6 m; U- mand so on......................

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0 v4 R  j8 G3 p! a9 |& p問題第二步3 L) w# J; r. |& _4 l. Y

! `8 y$ f; N, h& @8 T9 M9 \Weight 1:  1-6> 7-12
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" e  Z, K; m  V3 o" \: A1 OWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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* @1 R7 _% p% M1 M% O1 g: c========================================
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9 l/ H5 {2 _* e0 B9 S- D/ B問題第三步
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Weight 1:  1-6> 7-12& _2 c. B, n/ R! a1 C

# t% i3 `. r. rWeight 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