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)。# a0 o5 Y2 Y9 Q+ b. w
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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% a6 ^2 R8 N: ]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$ f& J& ~8 ^2 r% I. T  R9 V
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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 21:34:6 W. y0 [% `* U2 v& ^! _$ ]: ?2 l3 H
相信e條題目都有吾少人玩...

8 u: e! Q) R% g1 }0 l. Y我以前畫左個chart去答,5 ]+ A  h* w9 s+ R1 Z7 b
等我搵下仲在吾在
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4 M! O5 h5 U6 f  f. u當日用左37分鐘答１２粒波子，差７分鐘才合格。( ?) G9 Q/ r& I9 @
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:2 a; l) S# [8 u1 n% O: E$ r
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我以前畫左個chart去答,% h, Y& S/ E- [) z5 t" P) {3 P
等我搵下...

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0 i3 D5 f6 G" q/ D% D+ O" a. y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:: U/ o( f5 }0 ]  Y' G  L; o4 e, h
唔識隱藏...已經諗到..

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+ j" {" i" F, b3 E" a, \( H1 U- ysor !!!....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1 X, `" T. F8 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:
# h$ x0 w; J0 B1 R! p& D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.4 |& P- {) [" D0 z, @

$ r* q4 d5 R% fThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:/ N' z- V" ]9 ?  O8 }
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.* k7 ^: L- ]7 E9 m/ h

9 w5 w$ S5 F4 R% {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.
) k# T7 L: `- d. S/ |1-6 vs 7-128 e$ M# A- Q, h: V  i. D( C
if 1-6 = 7-12     13 is fake7 B4 w+ p) U0 Q  v
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if not   e, y( k; G0 K! a

# {( `. s9 I; `; d$ e1 C6 P3 d- O3 tWeight the 2 time 9 q6 [$ N6 z  B
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Suppose 1-6> 7-12
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1-3 vs 4-6 + z7 R1 L  L% e) V" @0 q% {0 [
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Then Weight the Third
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, D1 Y$ G) i% T# V3 @9 RSuppose 4-6 > 1-3
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# r+ O9 c8 m% V3 C3 d+ U% _Just like the first Step
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* T; m& s- J2 Y% r; V4 vs 5 % _! Q# Z4 Y6 E" Z3 i: g0 ]% v# k, @) m
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 4 h  C/ C$ g: A4 I: @3 s

, W4 E& K7 p9 _5 H- y! s$ nand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4* P. W# ~8 W- x! T4 ~
Group B: 5,6,7,84 ?$ k. @) {% _( s# s, R
Group C: 9,10,11,12$ }& A* U4 G* ]7 Q7 ]( f# b& A! S
Group D: 13
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$ W" q  r; A2 |( Q# zRound 1- k- Z9 }' M9 p: `# l# b
Group A vs Group B; A  h  I0 F/ r: Y% u( S
如A and B一樣, 即較輕一粒在Group C or D
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再在Group C拆成:
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Group Cb: 11,12# u$ r$ p: l. b! L5 z
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, : g6 v% B. E. w
要再秤, Round 3, 之後便知答案.7 e9 H. `' {6 L, Y# ?4 w
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e.g. #1 假設10為較輕的一粒8 w9 S' m' [' W% V4 e$ A
Round 1
2 y* H. ^& d% c& x: ^  f' i8 c, |7 V1,2,3,4 vs 5,6,7,8 = equal
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  R, }" @8 I# D2 H  yRound 2
" g0 @6 o* C: e; O/ s6 n9,10 vs 11,12 = 9,10 < 11,12
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Round 32 D0 l) H: b4 f. J* x8 O4 |
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒/ T( n6 X5 {6 @7 @. o9 v
Round 1
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Round 2' Z$ I  p- K, R0 s
5,6 vs 7,8 = 5,6 > 7,84 \: V: o. O- b0 ]
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Round 36 E+ P& q; j; E
7 vs 8 = 7 < 8
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* y* z; E& d9 P% J' IThe answer is 7.
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e.g. #3 假設13為較輕的一粒
7 x! w0 S( |) xRound 1. J% m% W/ u  z7 p2 f
1,2,3,4 vs 5,6,7,8 = equal
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1 K: G# `. Y+ R/ yRound 2
9 {! T# G0 g6 T1 }4 G9,10 vs 11,12 = equal
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2 J- Z% Y( R& f5 V' p% HNo Round 31 k9 ]3 O) u: z; S* T: @- G1 d" V
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The answer is 13.  o, p+ L- C. `9 D# E) r

$ B9 Y3 Q4 O. i4 o/ l# p; r唔知我答得正唔正確呢?! # c) r* {4 N9 L; K; g# d
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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:" M3 L3 e( j) u1 j% k
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1-6 vs 7-12: E2 c' X! _2 z) N& q  K
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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$ G6 h/ |6 h- H" jSuppose 1-6> 7-12
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1-3 vs 4-6
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. {$ n9 }6 g7 I6 EThen Weight the Third
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0 z: q; y4 |3 |) }, _( ySuppose 4-6 > 1-3# j/ P0 ~+ m$ {5 c7 R
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Just like the first Step. Z/ P) H" ?" b' P# P5 E
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4 vs 5 6 ~: g# A4 G0 m: Z$ c

! U5 i8 U2 Q  t- [: Iif 4=5 6 is the fake one
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9 E& ^! X+ {1 o& C' r' hif 4>5  4 is the fake one
" M, ?$ }& c7 d# \& qand so on......................

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2 x% p3 I  p' U# @4 |問題第二步
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Weight 1:  1-6> 7-125 F( v+ Z* e% L& n
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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+ o0 q; b$ x+ [) A) y+ \6 S你第三步点去搵 7-12 边一粒???
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========================================. G7 d, ?; A* Q* ~3 ?

/ D4 F% L% K& Q; i  D' g問題第三步9 N/ P: d; b# s9 b( v

# M( k  j$ j2 w4 C/ m) l" }4 w/ EWeight 1:  1-6> 7-12- E5 D( p) J3 I) s/ D! ~5 L

: X6 B  A, s" l8 z; @: z* OWeight 2:  4-6 > 1-3 ) s3 u7 d! T% z& j1 Y) V+ G
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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