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3 _0 @' d3 `. A6 l
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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)。* I- S( _. [1 F6 T) K; a
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？』! b% p3 I4 c) f; T) Q4 G9 \2 l
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注意: ' u: r: G! ~( M+ a
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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' P/ G7 _/ m3 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+ `, |. |& \+ G/ U$ v, x

2 \9 f8 d0 j, z6 r' l1 `& m[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
. v$ N- Z( B! q1 t- v" G相信e條題目都有吾少人玩...

+ q- s: }& \) V我以前畫左個chart去答,# H) t6 [0 O. Q$ h
等我搵下仲在吾在
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6 |8 U$ I  s9 n當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 @0 a/ P; h, R0 P$ }13.........
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7 C% W, [& _; |- a5 Z1 J[ 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,
  Z1 Q! a5 I( B/ q2 P. O0 S等我搵下...

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* X$ |1 q% S; Q3 W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:5 m/ D9 M7 h, X% P: r
唔識隱藏...已經諗到..

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sor !!!....e加改左: n9 F: x( f5 i

  s7 h8 Z0 x# |$ T2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
, C( R: w% F% {1 T' o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.& T3 U- D7 u/ S- p1 p4 \
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:( ]; g0 c& h+ N, `% R

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2 N$ S' L. J  P- t: w' P: _5 cPlayPlay, Let me know later who has the right answer and I will add points accordingly.' S& k, g& g# V- }8 a
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Thanks

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4 h3 f/ d9 K) s  ~! d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 7-128 J9 g; ~% {0 X, y6 f! g5 R& j& _
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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Suppose 1-6> 7-12
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1-3 vs 4-6 2 {; R: ~: N- W* H
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Then Weight the Third9 ]4 M* ]6 g. l: s( p
3.1 @8 G! ]6 a9 p- J) F& c

- U+ I8 K9 b( y$ E4 `Suppose 4-6 > 1-3
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Just like the first Step
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* S4 F8 Y% z. F1 i4 vs 5 $ ]: x' \6 G' [( `, T
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if 4=5 6 is the fake one
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. X4 g3 U. d% Hif 4>5  4 is the fake one ) X  d: }0 p- M, A* z0 c

; X- p2 K# `! V; M  ?and so on......................

hello1997

分3組4隻波子秤. r4 s  t  f; H& Z7 x" N
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Group A: 1,2,3,4
  t+ W4 q% e$ E) i9 R2 WGroup B: 5,6,7,8' W& A: S2 y- `4 W+ f8 p
Group C: 9,10,11,12# ^, I" s' h; C% U9 w* d
Group D: 13! G3 j) {( P4 c
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Round 1- y3 J! C, G" k
Group A vs Group B
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2 T1 n/ D) k; S- _Round 2$ ]# O$ k$ I9 x$ V
再在Group C拆成:& B8 A0 \% \+ {
Group Ca: 9,10
0 @) J1 g# ]+ R$ q1 z: j  I( @5 WGroup Cb: 11,12+ ~% h$ F1 s. |  Z" L2 G3 x' A
然後再秤, 如一樣, 即13為較輕一粒.  |9 U) V* C/ x( Q$ g

, [8 E8 m5 c* n  f/ M如不同, 即較輕一組有一粒較輕波子在其中,
) @' D3 s! c2 G7 V& ]1 h+ x' T要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒) J8 e$ U0 j' |7 k
Round 1* E* u$ L4 I, V  M: p( k2 E
1,2,3,4 vs 5,6,7,8 = equal" a+ O. J/ D7 A. A8 S" S
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Round 2* Z6 X/ q% u6 R, L
9,10 vs 11,12 = 9,10 < 11,12
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Round 3% `/ J8 s% [( y
9 vs 10 = 9 > 105 k6 B+ u* V+ }

4 ~, `) Q2 q' {& S2 _; yThe answer is 10.
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e.g. #2 假設7為較輕的一粒
& o1 i5 g8 x2 B- U. y/ PRound 1
+ H/ ?7 y0 ]* S- C/ v1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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8 s% G3 n$ C2 o6 h4 f0 }Round 29 A$ h3 U# _" n; e) |$ i% E% I% P
5,6 vs 7,8 = 5,6 > 7,8
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Round 33 S+ B1 j8 q9 i
7 vs 8 = 7 < 8- h! k, x; n# p5 W. z$ c
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The answer is 7.
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% f! O4 C4 d- X/ i9 S: @0 `- g2 ve.g. #3 假設13為較輕的一粒
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, u5 i, q9 |& t; l* a* {) M5 m- ^1,2,3,4 vs 5,6,7,8 = equal; Y2 K* W* H3 s( W' R$ J6 w% P0 Z

$ X- b4 ^& M$ k& a$ bRound 2
' B% |5 A4 y8 y9,10 vs 11,12 = equal
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3 @0 }1 c# G: z( mNo Round 37 v: U. c: k7 b8 X

/ r7 O) b4 z6 I( \& @2 WThe answer is 13.9 s1 T5 o/ s) ?) v% N; M

% a2 e7 G" r$ F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:
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0 y8 U% W8 W' P$ Q  ?0 Y$ p1-6 vs 7-12& s! l1 N8 J# a+ _# I
if 1-6 = 7-12     13 is fake
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if not 6 v- [0 Z. m# W: X
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Weight the 2 time
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# ]; D, V' _1 q5 X# V) oSuppose 1-6> 7-12
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6 i4 O4 \* g* D8 e$ \0 z% P  w* B1-3 vs 4-6 ! ^' Q0 d9 s. ], g  Y
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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+ w, L1 G  U2 Z: g" G
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4 vs 5
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% H, v5 p2 U4 j: O- u1 [if 4=5 6 is the fake one
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if 4>5  4 is the fake one - O" m' m, O0 u5 p
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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7 b: q8 g, M5 s5 `6 p8 _Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 k% |! W6 W9 [, Q9 \你第三步点去搵 7-12 边一粒???
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( U/ ~* o4 {7 z+ H/ B) z$ n) ~========================================  }4 v1 |) f  |- d% F2 T6 t$ ]

9 r. o8 q2 j* x7 c& @2 _問題第三步$ D+ |& F' u6 h7 q3 D' i; s
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Weight 1:  1-6> 7-12
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8 I8 G8 ?4 `. x6 GWeight 2:  4-6 > 1-3 6 z) P/ `( q" n3 p7 v
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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