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' I, t7 U1 h, u5 Z- h- v
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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)。
+ H7 D  y/ B, s: N1 r" x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？』  m2 w4 j& h4 n/ F! F1 ^

/ K) t# I5 U" x1 B$ E6 d3 v3 Y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
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! k$ D  A. y( `9 g+ v3 h( Y# p& C[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:5 {. n% j- t, f; ~4 h* A- w
相信e條題目都有吾少人玩...

1 X- e7 U2 r, E! ]2 Y! `我以前畫左個chart去答,
, n2 g) C7 c  s- x/ V8 |$ z/ n6 V' Z等我搵下仲在吾在( O* m0 {3 X  D" y

/ D, J' z9 m' C& z' T% J' G( \6 P2 @當日用左37分鐘答１２粒波子，差７分鐘才合格。) N: ?0 j4 Z0 W
13.........1 k2 M- h/ d% W7 N/ q. f

8 M& I$ N2 Q# @* i: ^6 R2 F[ 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/ x; ]& d2 _" K4 C
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我以前畫左個chart去答,( y2 a1 O+ ?3 @9 e
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:
* g0 a0 A7 P8 z8 s& U唔識隱藏...已經諗到..

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sor !!!....e加改左+ f" K/ x2 x& `; s) m# K. H6 F
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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7 ~' f7 p% T4 D8 u* r

( E: ]8 p5 M* _6 h. }6 e& n[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
% w& G0 T& ]- }: g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.0 B) r1 ]6 X  U8 P* u) Z- H: ]
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:4 i/ Q! }5 }$ _' h) \+ @
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6 H; ?( ]8 ]" \- F# RPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 o5 \6 G' d+ h  m9 hThanks

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4 d! n+ C) D3 g0 M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
% \2 c+ G5 P( S/ B8 V+ O+ ?- Qif 1-6 = 7-12     13 is fake0 q8 ^" `/ n% P* p( {! p, \' q
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if not
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Weight the 2 time
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6 v6 b7 V9 I1 ^9 ySuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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0 E7 z- ]$ {6 Q. D7 Z: xSuppose 4-6 > 1-3  M7 @0 L) D2 O4 w$ j2 P

; `- X( h% w% U5 w$ K5 c- N/ m3 lJust like the first Step( J' t) ?) Q5 A. A" w2 X; F

) i# ?: M: A' y) _9 J- |4 vs 5 ' o' `1 j( E( _

! d8 O, ?+ x  G- N! ]& tif 4=5 6 is the fake one : \( ]8 P; s1 ?* c5 n+ A. g5 r
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if 4>5  4 is the fake one 9 E% |! `. u, a+ H
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and so on......................

hello1997

分3組4隻波子秤
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4 [: d9 e7 H# KGroup A: 1,2,3,4
5 ^5 A, ]+ {* S7 X" ?Group B: 5,6,7,8
8 `. T4 T4 g6 S- DGroup C: 9,10,11,12
  g  s# u( `; `$ Y" v1 k3 JGroup D: 13
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Round 1
0 t8 H7 I, T1 L+ E. @. k$ w/ ]5 {, NGroup A vs Group B
3 c; f, U$ A; d如A and B一樣, 即較輕一粒在Group C or D
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/ ]- ?: T$ \3 G/ F0 lRound 2
. p% s5 u& e4 }再在Group C拆成:
9 ]% r3 Z) A5 \7 t4 V& `8 ZGroup Ca: 9,10; _" O9 b& l5 c5 |1 _% Q
Group Cb: 11,12
$ {2 `/ P3 k0 X7 _4 }& z6 o& P然後再秤, 如一樣, 即13為較輕一粒.
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9 I" R3 |' Q! x1 {如不同, 即較輕一組有一粒較輕波子在其中,
" n# ?* O$ R, K  d+ \要再秤, Round 3, 之後便知答案.* n( O) D2 S$ D% K& S8 ~8 c7 G( Y

) [/ \& i2 @, |2 ?) @8 o7 p/ C3 ie.g. #1 假設10為較輕的一粒
) X4 I5 @& ^+ |6 W" R* KRound 1
3 i! n% w" `* [6 F9 q1,2,3,4 vs 5,6,7,8 = equal
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5 B  N+ ?6 s2 Y" t, o% u8 uRound 2
* R" a: h  m7 t, g: T: c; o9,10 vs 11,12 = 9,10 < 11,12
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8 Z9 E$ y" z' k" KRound 3
6 w. a3 X+ ]% g) e9 vs 10 = 9 > 10
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The answer is 10.* o" K0 M$ @: G# b# Z' E8 w
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e.g. #2 假設7為較輕的一粒7 {: i8 P5 t- W( I  y  t
Round 1
+ i( W& P1 A6 [+ q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ M; D# v) z5 nRound 2; n+ i; D% A4 P1 t, d- F
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
& A8 i( V! J8 m' o3 L5 E7 vs 8 = 7 < 85 A3 I2 a: j0 l- p$ _
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The answer is 7.
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0 S& l1 a" W: o4 R4 s7 oe.g. #3 假設13為較輕的一粒: b6 [7 j1 ~- i" X, F# D% m
Round 1
5 \5 Z$ U. Z( ]' _1 y. \( z1,2,3,4 vs 5,6,7,8 = equal
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Round 24 ?! t8 A8 L5 {. z
9,10 vs 11,12 = equal
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% l, {! I  i# m3 t, Y  uNo Round 3
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3 @% J1 p3 S" P# _% xThe answer is 13." H+ Z4 \7 ^# C3 B; r  z

0 g7 t0 w, b% Q唔知我答得正唔正確呢?! ; H- w# y, @7 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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1-6 vs 7-125 F; A, U3 v# ~% [4 w+ |1 l
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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. p  H+ g3 \! m. b" |( S; u( sSuppose 1-6> 7-12
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1-3 vs 4-6 7 ]) H/ |4 S" H) `0 A
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Then Weight the Third
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Suppose 4-6 > 1-31 {+ r' c$ f) S1 z, ?5 p" S

! u" M$ y5 Y2 T9 {7 Y- G# xJust like the first Step
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4 vs 5
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, B; U' v  S7 `& y+ @if 4=5 6 is the fake one
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if 4>5  4 is the fake one , G& W7 N3 G) n
and so on......................

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問題第二步! F) {+ u) i; Z8 q4 I5 C

) o6 Y* A6 N4 ?7 S+ BWeight 1:  1-6> 7-12/ J* a& K# i; b1 }- z! M& e3 T

$ V1 Y' s# J$ A  X) q+ MWeight 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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問題第三步
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! U% _2 \9 C& Y& aWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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. ?$ }, n! F; {, L- `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