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' p) F9 w: [) @4 b( h

% w: N4 W5 J4 v, S9 m+ 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)。; q: k. f) L3 Y' V+ U4 |" F
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？』1 n6 k8 c* x& ?; d1 g  S9 T. M
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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1 M+ u' q. V3 b( b5 \' |

9 _  @) a: I9 X2. 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8 ]: M& ?; A0 h2 H% K% C8 _5 K
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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 21:34:7 p$ C" `8 x1 W0 s
相信e條題目都有吾少人玩...

) D9 k8 C/ i! p- Y; J3 k5 u2 Q我以前畫左個chart去答,% x8 M0 t, B9 D: t9 W( E! ^  ^6 N8 ^: c
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。) s% m7 q( V! g* \) _/ ~
13........., t  X" Y1 m" v+ r, Y

; _3 \5 T% p; C1 y, \[ 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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我以前畫左個chart去答,! U* ^5 r9 M* f' M
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:" I) W3 G. [0 ~0 Z) k
唔識隱藏...已經諗到..

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5 l' w1 U3 a2 v: ~8 L" ?- i$ d; \' Asor !!!....e加改左8 Y, }& ]& [7 f$ q2 ]2 C

1 V( l0 \. \3 n9 T, 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: E. E) E3 s1 r. X, E: W" V
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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:
8 V# i" u2 T3 X& _! {相信e條題目都有吾少人玩...

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2 W; d- `5 _0 H$ ]! r, xPlayPlay, Let me know later who has the right answer and I will add points accordingly.* i+ m( A; Y$ O$ g, I) x. D
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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.
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, @8 D# U1 V- h% G5 LThanks

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1 O, _2 j; v: b! P' ]/ g5 v不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
5 s6 I, x6 Z" z. S9 U& `1-6 vs 7-120 j( P9 M- G/ ?# |
if 1-6 = 7-12     13 is fake4 O; y, W$ S+ P7 i

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Weight the 2 time * G7 r% H/ N0 v! s$ r% s/ D1 R
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Suppose 1-6> 7-12
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1-3 vs 4-6 $ c- L' x8 x1 E0 ~* a0 J2 P

! m7 G7 a+ j$ C1 A) O* p& hThen Weight the Third" G  v  e3 ?( V) v9 f& C' K$ o
3.
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) P; F: q* O& L1 P2 n8 }* @- cSuppose 4-6 > 1-3
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& o7 _$ `2 a  u6 m5 rJust like the first Step0 ]! z2 H2 j9 w; \4 D" b9 G$ c7 x
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4 vs 5 - P, H/ n- F; z, }+ C$ s, K

7 U6 c, z4 S/ A1 q! Z. |if 4=5 6 is the fake one
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/ d; d/ Y# l7 x6 C5 Aif 4>5  4 is the fake one $ }; C- v# y4 p* A/ o! G7 Y

' r7 V6 P6 l  x& x5 Q3 ^; Dand so on......................

hello1997

分3組4隻波子秤# r+ k$ m' T: G7 ~
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Group A: 1,2,3,43 ?: K: |1 @! ~8 X9 [5 N
Group B: 5,6,7,8) m( D: w4 [# j3 w: S
Group C: 9,10,11,12
( C! W( V  M- O3 pGroup D: 13
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1 y- g! A. i, @) hRound 1
3 m7 }5 v2 c/ X; S; ~; R9 z- L! xGroup A vs Group B
; ^; T& H; j0 c, J如A and B一樣, 即較輕一粒在Group C or D; a7 d& ~/ E/ G4 ^" t) Y& \

+ f+ M9 n* ^! e. W: Q! B5 a; zRound 2: x* m, l) a+ n: S" C  z( ?
再在Group C拆成:/ c4 `1 ]1 y1 o. L
Group Ca: 9,10
1 [" J$ @) o& o+ t$ a. SGroup Cb: 11,125 n1 f+ l2 z2 A1 w3 d% h% f( c
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,
; j' L* h; k! \9 A要再秤, Round 3, 之後便知答案.' A8 L4 x9 z# J8 ]0 H

1 R5 f8 K* P% p# y+ b+ {9 t! \3 Ze.g. #1 假設10為較輕的一粒
, ~8 y6 ?# L8 \" n6 V! bRound 10 y: _, G5 I3 H! l$ x
1,2,3,4 vs 5,6,7,8 = equal& H# u. g; ~4 I, S$ H' k# l( D4 L( s
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Round 2
& m. B" W4 |- w2 r& u9,10 vs 11,12 = 9,10 < 11,12
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Round 3' B  e1 p- v# R; u$ b! x
9 vs 10 = 9 > 10
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& ~4 D: ?( p6 I) I4 P5 r5 DThe answer is 10.! @. h6 s0 Z' D  p$ L- |5 ~+ g, n2 P
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e.g. #2 假設7為較輕的一粒2 p1 U' i% T' r6 ]' E4 P
Round 1
/ Y9 r- I" S/ o0 ^. v1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 P0 _1 T! Y# q- b  W, U. P
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Round 24 z5 `) K" W' i* R' r/ F
5,6 vs 7,8 = 5,6 > 7,89 N0 j  |5 ], s- |2 {7 d
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Round 3, S: ^8 p9 @4 Z) V4 [' e
7 vs 8 = 7 < 8! _$ w" W  F7 J

/ B0 D& ^1 z! T! }: bThe answer is 7.
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e.g. #3 假設13為較輕的一粒
( J8 A* C1 C0 a" H. a- j4 a' T: V, MRound 12 |, q* _+ i% o. V
1,2,3,4 vs 5,6,7,8 = equal3 |" u# G# }! s3 X
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Round 2
2 Y+ T1 L/ ~/ D: T; k9,10 vs 11,12 = equal' ~" K: x4 o% i! W
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No Round 35 @. ^5 D+ h( k  y8 m

3 v9 N" y# L( k) ^+ @2 p/ s0 X9 YThe answer is 13.
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9 q0 N2 o) n4 s7 Y唔知我答得正唔正確呢?! " x0 P3 O( v, x. T! C/ y9 r

" ^$ k; R0 D7 f, ?7 Y, D9 o[ 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 7-12
! A! {$ b( \7 u" f5 kif 1-6 = 7-12     13 is fake+ S% D1 _) r. y; H$ S0 v  Z
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if not ! Q0 P8 f7 x. s; k0 \+ x$ q6 U
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Weight the 2 time ) x6 w/ j( Z, R% w2 X

$ Q  K1 S" z& v) _Suppose 1-6> 7-12: _$ y# P9 R$ P' y7 p* H$ e

' c( T8 Q3 J* r9 ^0 |' k0 S# x+ U1-3 vs 4-6
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  A# ]7 O9 H: {, @% cThen Weight the Third2 N9 m* h4 U( z  }$ ?) O
3.
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Suppose 4-6 > 1-3  K  \! q. U# n2 c. w

$ f$ ^" q, i3 y: K2 M1 [# uJust like the first Step8 X9 Q, d) W" C+ b8 ]) ?

0 p, X9 ^& D7 S8 B& [" I4 vs 5 1 L/ n& M; B5 p; v3 E2 [0 b1 t
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if 4=5 6 is the fake one # S! |* G2 Z; v1 l9 J2 u) ?; [* K: F% m
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if 4>5  4 is the fake one # Y, Y2 C/ u: [. e
and so on......................

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$ i& {  z  \, P, R) c1 j問題第二步
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/ g* W, x6 a+ s$ n% wWeight 1:  1-6> 7-12+ `( s# n" p- Z
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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: N3 Y+ |7 C1 K! I4 J: \/ X你第三步点去搵 7-12 边一粒???
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========================================
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1 K- j; [* w$ c# F問題第三步  J6 O  K  C* q

, j) j; ~9 a2 ^6 W6 ]Weight 1:  1-6> 7-12
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6 o! V1 S, D* }9 g6 _; g) FWeight 2:  4-6 > 1-3 3 V, c+ O8 Z: U8 W0 |: e
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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