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. C, `2 D2 @- K/ ^% T

; c$ d8 \; v! R- W* m『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)。
0 H7 N0 E7 S; g/ V6 n$ e9 a# \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: 3 Y1 p8 d) D9 E/ S" z' F
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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
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9 p. T4 ~1 s) u" ~: [4 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  , hide 字要連埋 , 內容 = 答案% ~- c4 d/ l3 y/ p) {+ W* i

( P0 K( Z- {1 |) B" t9 c4 d[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 f! }& j4 m- _8 G. C6 B* g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,
1 a' L! {9 q( H6 _" f: W" X5 N2 R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。
( Y+ T0 O- b! I' M: \5 [# W13.........7 Z$ W" u3 {4 C
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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:! w, l, k& c' u$ m3 S

$ ^- C3 W  b- \* M我以前畫左個chart去答,
& K, ]3 f* _7 v. ^6 P* h' r+ Z等我搵下...

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0 z1 n5 M7 @, H, H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:
* ^% G+ G( q& c唔識隱藏...已經諗到..

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sor !!!....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:9 d' `% T1 M0 g( R% Q5 }
相信e條題目都有吾少人玩...

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+ o2 i+ `+ n2 c& 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:% {7 _3 ?% t% r* b3 Y* W( _: W

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/ {6 B/ b$ J0 B& k7 Y# XPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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6 J8 ]+ Y/ f' D) y+ q' 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

1.3 T. t# s  W/ t! [4 H
1-6 vs 7-12! A3 U0 s4 \9 b9 G3 Z
if 1-6 = 7-12     13 is fake. H3 [1 i8 y6 ]3 b0 @1 G  g1 D

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Weight the 2 time 5 X: |7 F4 A0 u; ?8 q8 [4 p
$ \0 D+ l' s$ c& H& s( v
Suppose 1-6> 7-12
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, O* j' l/ F* U6 z0 [7 w6 v1-3 vs 4-6
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3 V: z" Y. c( ?) Y: LThen Weight the Third
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: T8 k7 X" T8 ?Suppose 4-6 > 1-3
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$ Z) b2 u% m/ ?6 d0 d4 W6 kJust like the first Step
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7 M% I% \# K) S4 y4 vs 5 6 ~) G6 C: L" ~8 h* s6 a+ E- B

! o4 f' D  `4 Mif 4=5 6 is the fake one - @0 \6 L7 s7 b- w/ `& Q
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if 4>5  4 is the fake one 5 K6 c# m6 w0 u0 U) Q, b& C

2 ^9 {/ N' ]# H0 |- \. Eand so on......................

hello1997

分3組4隻波子秤0 \7 f& w5 h+ A. w+ s
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Group A: 1,2,3,4
: M/ I+ x0 a- lGroup B: 5,6,7,8) I' J. V8 Y2 y
Group C: 9,10,11,121 r8 F; r+ A6 R8 |7 v
Group D: 13+ U8 A& _3 t+ W% A  h

7 z7 M/ k. o, ^Round 1
. k( ~+ n- K3 W; ], @Group A vs Group B
: g; X% i- U2 F* l# I! D, s如A and B一樣, 即較輕一粒在Group C or D
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& O3 `# }; W- ?8 k0 ^Round 2
9 o! m/ U: M; |再在Group C拆成:
$ y; z* N' n( x+ e, v" TGroup Ca: 9,10
. D6 x3 h* U+ g8 [0 b/ RGroup Cb: 11,125 f# w- s$ r8 P" {5 Y
然後再秤, 如一樣, 即13為較輕一粒.& V+ K+ s# G  J$ h0 z

# H, ]7 h8 Q( f' ]如不同, 即較輕一組有一粒較輕波子在其中, , S. `- n1 V- t9 f
要再秤, Round 3, 之後便知答案.
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: P) V: a6 K- D1 {; ^- I% E9 qe.g. #1 假設10為較輕的一粒
' b' B0 r! Y% o( X7 z: xRound 1
" \& w# P( @! l& [3 r2 @1,2,3,4 vs 5,6,7,8 = equal/ _# F$ W3 f' p0 N

2 m; X3 J1 _  F; D! s/ W3 H* ZRound 2% N7 N; H4 B$ A% [
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
& o6 A( D3 V* B  l9 vs 10 = 9 > 10& P7 M3 S+ ?' ~/ h; o+ |5 \

/ z. e$ a/ S! W! M* R/ sThe answer is 10.
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e.g. #2 假設7為較輕的一粒
9 z! ]1 {6 s- F& t! `6 ^Round 1: Q- G# w, F+ h7 b
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 20 G+ `2 O" o* N: Y" ~3 j
5,6 vs 7,8 = 5,6 > 7,8
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Round 3" v, V8 N1 P  O
7 vs 8 = 7 < 8( m$ ]; }8 ]8 ^  o

7 O! f9 L+ f! i+ P. L) x) zThe answer is 7.% H5 f, |; z' S( R

2 X- F! q7 T) \1 j/ Q: a+ Oe.g. #3 假設13為較輕的一粒
2 p; P; P0 M! tRound 1! Z! U0 w# F% {
1,2,3,4 vs 5,6,7,8 = equal
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# n3 P* L1 M% F( p0 H! |% k2 ARound 2) @( A; m6 M# Y
9,10 vs 11,12 = equal1 D5 H% v9 J1 J  h. u$ x, n: L$ k
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No Round 3
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# y( e3 A8 l9 S( _' J5 WThe answer is 13.
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  ^$ O4 \5 c2 ~; L& N' }# c4 q唔知我答得正唔正確呢?! * g. H. ^1 D8 t6 Y

" D( E' s# M: \: L6 Y" R[ 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* M( ^( Q" e0 x
1.
9 p7 c. Y' y. T) k$ V; `* o9 h1-6 vs 7-120 E4 s% C2 O, L  Q
if 1-6 = 7-12     13 is fake
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if not ( S2 J+ P" G, A: I% \9 ~

. N8 Z) I) {5 l: X- V% pWeight the 2 time $ }" k2 X* _; f9 k

+ u* f0 H$ V' ]6 s  K; _Suppose 1-6> 7-121 {: J3 w  K# ~: e  }! w

$ S3 v4 Q- X; {1-3 vs 4-6
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Then Weight the Third5 c* v- R  r% V# ^& [
3.
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( O# V; s) o% P/ T- _4 m9 g- @5 W$ v: CSuppose 4-6 > 1-3; R2 o: ^" ~+ z- o5 ~3 J4 I
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Just like the first Step
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4 vs 5 8 G! D- k; u/ i

4 l  L8 |) Z7 j' s- v" Wif 4=5 6 is the fake one 2 t. {0 L. Z9 t; o( Z2 x* y5 Y7 [

+ z$ Z8 |6 N+ v" \+ t4 H) N1 e" yif 4>5  4 is the fake one
4 h' }( b& l  |' R# T, xand so on......................

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* r3 g1 [& a! c, M4 V) n  {( f問題第二步
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Weight 1:  1-6> 7-12
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: ^& M5 J( a. F1 r) jWeight 2:  1-3 vs 4-6 , if 1-3 = 4-65 C3 @8 Y" _; d, r/ l

. \5 z8 K6 a( N) U1 [" @你第三步点去搵 7-12 边一粒???2 H3 {0 G% A% J  V
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問題第三步6 m0 D2 v& D( f2 Z* w( t

! M2 f, k! b1 cWeight 1:  1-6> 7-12
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. D+ a- r5 B" Y( Z$ @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