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$ ^: e, O/ O! V6 O# B" ~8 J' `  v0 R

3 P1 N# |8 j6 }. |7 {" U『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)。
) y+ }% c. K$ q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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# ~, x2 L) l2 P$ U1 \2 J5 e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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
. ?  b; M6 }; F5 U  E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,
3 L6 p' X0 m0 K; g& J+ V! X" G等我搵下仲在吾在! p; B) W/ u2 f  d& H. c5 l

" p7 w, h1 u3 ]% t當日用左37分鐘答１２粒波子，差７分鐘才合格。+ S: V) [( s3 e( p2 D( o. B
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:; u. ^* R/ M2 [/ z

# w) j7 Q7 |2 d$ ?! w我以前畫左個chart去答,
- V- K" m! Q. R; T; c等我搵下...

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. g4 l4 R3 J* j+ h) K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:1 ]3 g' [' }$ d6 R- q' c
唔識隱藏...已經諗到..

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sor !!!....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
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, M3 p5 |2 H: J8 R[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
& S' V$ N& r$ ?& ?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:# j# h" L5 U) }$ }7 w9 I3 D

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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

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# j$ T  v6 Q( l- T9 f! ~不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
7 |4 J5 t2 g: D3 P! V. z1-6 vs 7-128 w9 ^. g( i8 L0 V
if 1-6 = 7-12     13 is fake2 b2 c+ }6 ]6 O: X( J5 }

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) i: j; i4 M" iWeight the 2 time / L7 W; W3 |0 @) B% \& f
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Suppose 1-6> 7-12) j: A/ ?0 ^' h

7 [7 v1 C! d( S) ]( q1-3 vs 4-6
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3 K( c. D; T2 v( [2 `/ F' [" bThen Weight the Third% Z" U; \; A' h! v: y* |8 i+ p
3.4 o, y* k7 a. a2 p% I! q

' J2 @; x4 F' HSuppose 4-6 > 1-33 ?; K" M+ ?1 S4 Q; e8 u

4 v; d( v# X, ^/ C3 M6 p4 [$ D) PJust like the first Step4 k: ]( A  Z- w6 K

' M5 B$ U! Q4 u$ V  c$ ^7 {8 P8 ~/ L4 vs 5
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if 4=5 6 is the fake one + h  D6 i' o* r: l

' y! W3 J( K$ b+ g: T1 |if 4>5  4 is the fake one : G2 {, s6 F2 s+ c# b# \

) y- e- T0 j0 f) xand so on......................

hello1997

分3組4隻波子秤  Z6 o- {6 Q/ e; t8 i
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Group A: 1,2,3,4
3 G- P0 x! a8 J) o+ l& L' _Group B: 5,6,7,8! H$ `9 ~" K# f& ~
Group C: 9,10,11,12' T# j; L, n, y( i4 j7 f0 S' z" A, z
Group D: 13: Z6 a  G! \" ^( n$ T: K" n: @
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Round 1* A; a2 f; p; I! L, W
Group A vs Group B6 z% B  X: }8 \+ @
如A and B一樣, 即較輕一粒在Group C or D
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. h8 i' S; c/ w2 e+ m; rRound 2
: E  x. u) N/ h$ A再在Group C拆成:
# V2 B& H  Q  P; B, P7 @Group Ca: 9,102 \. n0 H8 u' s& Z
Group Cb: 11,12
5 N  D4 C8 j8 T* r5 f* ]+ j然後再秤, 如一樣, 即13為較輕一粒.
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0 V( a1 x) ]5 q' d2 x0 X$ h如不同, 即較輕一組有一粒較輕波子在其中, * j6 b8 M5 q/ s9 A0 }
要再秤, Round 3, 之後便知答案.
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% [2 F, W9 q- U+ J( ve.g. #1 假設10為較輕的一粒; ~# `2 y. E) d5 o+ v, d
Round 1) j. A" z) @2 {( L' M, a
1,2,3,4 vs 5,6,7,8 = equal$ O" s/ H. c; p! G) O8 I
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Round 2& ~2 S8 }- O( T8 I* j
9,10 vs 11,12 = 9,10 < 11,123 Y5 J0 h9 L0 }* d
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Round 3
  @1 A$ y" _; _, G) x/ O3 X8 \* E2 M9 vs 10 = 9 > 10
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The answer is 10.: P. y  B& X/ _! _# \: p

6 f; W! C) ^3 o+ Ce.g. #2 假設7為較輕的一粒8 [; s( W5 s: N5 F1 e
Round 1
, a% Y/ D& Q3 L% m8 `1 L1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
) d+ L9 a! S- Q7 x/ m/ o* q5,6 vs 7,8 = 5,6 > 7,8+ [7 A2 L) n% e
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Round 3
& i/ h; P6 t  y1 [) T7 vs 8 = 7 < 8' i. V- X( @( p. F; J5 n

% X; V% R9 X3 [+ j+ L( f( h3 AThe answer is 7.( K! ?! c7 Y# g0 U2 z; A
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e.g. #3 假設13為較輕的一粒
# d, X$ X6 {, t+ K! _- W7 pRound 14 S  {1 O& T, P" d3 D- S. v
1,2,3,4 vs 5,6,7,8 = equal# W+ Q' c, W) h9 r- N. C" r4 y
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Round 2
5 `3 H; C. m. o/ j9 g9,10 vs 11,12 = equal
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No Round 35 e3 v8 H7 h" j8 v& y: U0 b6 [' C
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The answer is 13." b' p7 p1 C5 n( ^) S
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唔知我答得正唔正確呢?!
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% G4 u: k# |# A- a5 r. P9 l: ?: y. r[ 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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7 {7 C; `8 x# n8 e! V8 N) U1-6 vs 7-12
" U! k6 ?. x7 _/ Y$ ?" Dif 1-6 = 7-12     13 is fake: ?* ?9 `4 P# H5 T. ]( M7 w8 F

9 n4 |1 U/ }: {# S' Kif not
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6 F  o; N1 v+ zWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 9 t+ m5 U8 H, R' q5 D

) G& B% G" p9 y' z2 x9 |; \Then Weight the Third. X8 x% L. Y, F+ ^9 m
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Suppose 4-6 > 1-38 E: @* H: x( b- @
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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. c# v: l5 ^) z- y4 nif 4>5  4 is the fake one
; j: M/ N# r: y5 Y7 Sand so on......................

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問題第二步
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Weight 1:  1-6> 7-12% g& y, u: C1 U

* b# S/ x8 G, K& r" [Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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' z8 E; U2 A1 R& k7 }你第三步点去搵 7-12 边一粒???- M- S" F2 d5 g! S6 L
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========================================
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( m9 Y' V) \% ?# H+ L' N$ }# T問題第三步- z7 |, ?' Z% C. h3 a- z$ X
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Weight 1:  1-6> 7-129 v  ]1 ?+ W9 u8 [" R

8 N  Y. s5 j6 ]$ B# W6 c, q) r4 ^Weight 2:  4-6 > 1-3 7 ]/ Y/ }9 e, V8 f( F
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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