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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: X' s9 _! C! z& J2 R/ l0 u9 h* ~5 K- r『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)。/ T6 d" Y$ m; r' ~
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 u3 {5 g* \# y# @

+ g6 i% F) s: W: z8 I2 }! M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
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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: o/ N' k3 B; n$ i; u

9 b- F" y+ M7 l7 B3 T. F[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:6 `! O. H4 _6 f' q2 N6 K
相信e條題目都有吾少人玩...

2 V; C$ R9 T& x) Z/ p: Z  Q我以前畫左個chart去答,* j6 S+ O; @9 L  H
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。: l* \5 p! c, X
13.........2 i/ u( U1 {8 J3 k$ y/ Q% z3 m
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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:/ u  X  L5 N, s( P" ~5 }: `

0 n  P  e$ p- x我以前畫左個chart去答,# q2 y( P8 z' C
等我搵下...

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. J' o; r8 N, q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:
: ]# v3 K: l3 i+ K) S唔識隱藏...已經諗到..

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sor !!!....e加改左+ M' R8 c; @' k& L! q8 V

# e1 w6 p7 Z1 f7 G. j# [& ~% @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  `/ h2 Y+ s$ Q! e8 x- i

0 i* g. S% |5 k9 b: W: `: f8 l3 y[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
6 f. r1 u% l; o  D% c+ l! U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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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8 y" ]- K* e  W2 V$ Q# cPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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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.& `4 Q& I, J# G
1-6 vs 7-12$ U" [" t- R. `
if 1-6 = 7-12     13 is fake
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if not 8 k0 z/ Z0 J8 ^
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Weight the 2 time 1 V6 k9 j& u5 f$ C  N

5 t; i8 {  b( d( z% wSuppose 1-6> 7-12# b' @- V/ m6 Y/ l6 w7 U
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1-3 vs 4-6
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Then Weight the Third
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( a" p6 G" E1 ^0 [; fSuppose 4-6 > 1-30 x" P) V1 ], Y9 I7 o4 q& @# X
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Just like the first Step& I2 M- s& T" z9 o# f, l" q

+ h5 Y$ Z3 e; ]+ X3 ~( X4 vs 5
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if 4=5 6 is the fake one 3 }; l; L9 A2 Y4 @
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if 4>5  4 is the fake one
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# z4 x" ?3 E' U# f3 X$ kand so on......................

hello1997

分3組4隻波子秤
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. @' V5 R: k# E- g) SGroup A: 1,2,3,4" H: `# B% x3 r3 v8 s
Group B: 5,6,7,8
4 I; M$ H/ |! c# d( ?Group C: 9,10,11,12
2 R; p7 f* o  D0 }5 J5 i% nGroup D: 13
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+ Q! X) M/ k3 ~3 BRound 1
2 ^0 Z7 L" z1 k& D( r& h9 uGroup A vs Group B
# @& ]+ A( o7 q8 Z2 ], Z如A and B一樣, 即較輕一粒在Group C or D' @  K2 f# V& d& @$ b
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Round 2
! v* l" k3 `2 f; Z' A' y再在Group C拆成:* a2 ]/ q4 ^$ G7 z; M3 o
Group Ca: 9,10! e- b4 U9 H& q
Group Cb: 11,12
4 X7 d& W# ?# ?+ q! f5 M  U0 h. X- a然後再秤, 如一樣, 即13為較輕一粒.& N6 L8 l; p: ~& U( r) g2 S
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如不同, 即較輕一組有一粒較輕波子在其中, ) g1 K1 W9 @5 a5 E
要再秤, Round 3, 之後便知答案.
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' h7 }/ Y* W* m4 Z! \+ [e.g. #1 假設10為較輕的一粒
/ J  U% E+ {9 B6 A7 O/ z; `: V/ mRound 11 W; f2 U; I  I+ W0 P& h$ O: o
1,2,3,4 vs 5,6,7,8 = equal2 ^/ z/ K" Y7 m% x7 J2 O4 h
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Round 27 @4 [# f9 K& R$ ~2 ?
9,10 vs 11,12 = 9,10 < 11,125 O6 d2 @5 @3 r8 Q2 j1 y
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Round 3
% _: O$ A1 a/ [0 Z# v, J9 vs 10 = 9 > 10' D- j# X" _/ Y6 ?0 i* A4 G
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The answer is 10.: d& t8 q' ]& B& |* p
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e.g. #2 假設7為較輕的一粒
3 {# ?8 X6 _# w1 h/ a- G  i* {Round 1
- u2 G2 b8 G& @! i$ Z3 }9 y7 ?: N1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 t3 \( O2 E5 e* v2 S$ E; s
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Round 2
; c2 P) w  l. G2 f# j9 L5,6 vs 7,8 = 5,6 > 7,8
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Round 31 e7 V; \( a0 b. {
7 vs 8 = 7 < 8# F7 `6 W& \$ g( e! N. ^, D0 g
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
. r: L. I8 q9 l: }% RRound 16 \8 A- \$ R0 ^/ X; F3 H
1,2,3,4 vs 5,6,7,8 = equal0 D- F& f( _4 J. p# A/ @" E6 G
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Round 28 o" B5 C. R3 e
9,10 vs 11,12 = equal' Z8 r4 j0 z! |: j
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No Round 3
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5 V& N7 s7 y- B: o0 e  a$ P' F+ gThe answer is 13.9 Y- U3 d7 @: {/ L" R+ q- x0 a
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唔知我答得正唔正確呢?! + B) k( d) {# |5 F0 K% K) X1 {

% D6 `' ^$ B  a! ^[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:9 T( R. |5 F1 t2 f$ ~* w8 N- r
1.
7 w# F+ Y9 o+ s) s1-6 vs 7-12# @3 [4 F$ c: q+ v7 L+ Y
if 1-6 = 7-12     13 is fake8 V% z9 o, A$ _% Y* z; U$ M- @, p+ {) I" L: u
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if not
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Weight the 2 time
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6 s. d& E/ z- C6 y0 vSuppose 1-6> 7-12# B. H* D) M/ W6 v$ T+ }2 S
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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) g: T  L1 m; A4 vs 5
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if 4=5 6 is the fake one - `' |  v  E; o4 ]/ k

7 P1 @) Z; D, X! y3 h, D* Dif 4>5  4 is the fake one ; z1 Q3 O. B9 B0 s$ x
and so on......................

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3 e( i8 x* b: E, b# W問題第二步! q- j. j% S, v$ `7 E% b) _

2 H% h8 v7 g5 \4 r' Z% N. EWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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+ e7 J8 k% ^: ]* u你第三步点去搵 7-12 边一粒???
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# `* _7 e4 K5 V9 `0 X4 d- J  {========================================+ b3 F# G4 `2 t9 R* ?3 O$ `* `

" m  N% A8 ]' g, V問題第三步* t% K: D# |1 H/ G

0 t5 y! J. m4 ~7 u1 hWeight 1:  1-6> 7-12
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3 I5 `1 _$ y% H4 wWeight 2:  4-6 > 1-3 5 o8 j; ?. ?, @+ |  [7 S8 u1 [! U
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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