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4 A, o/ y4 [+ l) z% K
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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)。
, n% E  u( @8 M7 R& s) M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？』% J2 `( M' q# S  c7 l6 W# E

+ T* T+ H+ }/ Z" O1 b3 c! N( _9 b注意:
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- j3 b) f! X1 W! k+ _+ k1. 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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+ r3 P# B9 E# ?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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% q) c4 J: \. r' g  o[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:" j2 S" P# M# s0 W9 m
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,9 a7 |- g" O" A3 B
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。& X7 Y4 s7 A8 z: v* P+ h" E
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:
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我以前畫左個chart去答,
6 @3 Q' n0 U6 M0 Y. V5 c等我搵下...

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' y/ p% y# r$ {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:# z: V8 s1 ^/ P- o+ M) D/ }
唔識隱藏...已經諗到..

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2 f1 K4 t7 ~' u7 o) Psor !!!....e加改左. F% x8 z: w6 U8 N1 L6 d
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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% b- K- s7 U" q/ Y3 B6 ^
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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:0 i& c' ?7 k: |3 e& _$ g- Y5 v
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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% d( s* l" R, z) ?Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:4 G, d0 M1 I3 Y, c
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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; h7 {! r1 T. _% V' K. n  C$ VThanks

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/ }/ D# w8 u3 W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- D2 [6 d: _: a. R8 W
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12
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8 T  ^0 P# c9 b: @0 I9 Q# |! n, c1-3 vs 4-6 4 `6 z, o3 P( J1 a6 F8 p* Z
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Then Weight the Third
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6 O! X; X- r9 e$ ZSuppose 4-6 > 1-3# b: W8 u! [& ]
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Just like the first Step. {2 E& U; I' \9 ]4 {- W9 E4 }

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if 4=5 6 is the fake one $ `" |4 A0 ]# Z+ W4 R% {
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if 4>5  4 is the fake one " f( `) W% H) i

; H4 u3 B3 k$ T& Kand so on......................

hello1997

分3組4隻波子秤
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- S  ~: l/ w; @& y  D! S7 M: TGroup A: 1,2,3,4
3 c& B6 Z$ G9 ]6 T6 J6 xGroup B: 5,6,7,8
5 @( J4 u  O2 P/ T  s) DGroup C: 9,10,11,12
& ]5 B6 Y, ~$ R; bGroup D: 13" H8 a: {3 I* t6 \

: B2 {& i6 R5 WRound 18 e) I% a4 }/ N, E& H" w
Group A vs Group B- e! I4 b( H6 p% s; p- |2 V
如A and B一樣, 即較輕一粒在Group C or D  `( ~+ p5 N* U- M

7 C. M" B: w; h$ z1 S5 `Round 2
! F. _! r! H$ K4 z0 K再在Group C拆成:
" \$ K: Q+ D( J4 ZGroup Ca: 9,10
$ l/ ?) L+ `! C2 K" g/ A9 aGroup Cb: 11,12! B+ \: `' ~$ c5 L- h8 p7 H
然後再秤, 如一樣, 即13為較輕一粒.; p1 {/ c. k. `  h7 Q& r: H* w

& w, l5 {+ @3 _2 w3 f- _如不同, 即較輕一組有一粒較輕波子在其中,
6 i0 r" d; }+ V( b( D: j8 E要再秤, Round 3, 之後便知答案.6 t& j8 N: F& x
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e.g. #1 假設10為較輕的一粒6 @* n; U/ l' J7 D" i
Round 1; i- ]& o$ M/ D
1,2,3,4 vs 5,6,7,8 = equal& \6 z! l. g$ B  y9 _
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Round 2
9 q/ o% E5 n2 {) s" b" K9,10 vs 11,12 = 9,10 < 11,12
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Round 3( j3 ^% Y# M8 L3 }  i( t
9 vs 10 = 9 > 107 z+ v& }' n' a3 S

4 y" w  @3 c, R0 J# W# {/ [, EThe answer is 10.
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7 P: m5 Y, _! P" @+ l/ B& ?% `$ {e.g. #2 假設7為較輕的一粒
' G( T% z  r5 T7 s2 YRound 12 n) B* |1 I1 g3 f9 D, a3 f# [/ P
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" P# q. e2 T8 s* @4 P
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Round 24 F# ]6 z' J- i2 y5 v# {
5,6 vs 7,8 = 5,6 > 7,85 b$ [! H, C" C9 k5 G. ]

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7 vs 8 = 7 < 84 q( W# z2 N5 L8 q2 o
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
9 ]7 q8 ~  g& P9 m5 @3 S" |( KRound 1
2 @/ u  j& y. _+ j: |6 a1,2,3,4 vs 5,6,7,8 = equal
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Round 25 J6 ~/ A7 a/ _0 S# v6 M
9,10 vs 11,12 = equal: k+ {* I5 {# l& l

2 B$ n) k7 O6 x7 H% _No Round 3, J5 D0 w+ ~0 @0 s
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The answer is 13.
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; q0 ]) O  j: o, a4 S) e& D- c" U8 G唔知我答得正唔正確呢?!
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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:  `$ n$ j) x) F% f( B2 n
1." L; i5 s& N0 u( c4 v" U% D" V* Z
1-6 vs 7-12+ y& B# v* @& ?; @
if 1-6 = 7-12     13 is fake+ \  v; b; F8 O8 p( L' c% s4 t

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Weight the 2 time
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- _& G' G' J! z2 e/ fSuppose 1-6> 7-12+ o, ^- _0 Y/ `" k6 a
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1-3 vs 4-6 5 P: _9 t/ ^& E8 S2 K
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Then Weight the Third
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* _/ w- k) D& _6 j  bSuppose 4-6 > 1-3; E0 ?/ q" H: p( `" e, n- s& B
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Just like the first Step
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5 F: |3 u5 t: R$ B4 vs 5 ; f4 ?3 G+ A4 p+ u% _8 E
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one + |) _. }  h4 N  N& W+ {
and so on......................

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  t" Z$ _9 X1 l8 a: K$ x7 K問題第二步6 p5 o  w3 o0 b$ ], K
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Weight 1:  1-6> 7-12- h# w- z( }) o, H

. X7 W9 D, v0 W, |9 h2 k$ _Weight 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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========================================
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問題第三步
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+ {; k- I0 s# _+ zWeight 1:  1-6> 7-12. u* o& k9 A+ E+ p) r

- J% v  g' b0 O7 v" t3 L+ Q3 `Weight 2:  4-6 > 1-3   h4 M, h$ t: n5 C. z" n) l
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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