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 d/ m+ G6 g7 l- N# Y- x
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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)。: t/ ~% |( o1 G0 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？』
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注意: ; D1 }) A8 l4 R2 [8 X7 x2 P
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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2 H+ ?& s, o7 u5 P% K2 t
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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:
5 _, V6 J9 u% \: P* |4 c3 y相信e條題目都有吾少人玩...

' G+ o% W7 X' c: a3 L3 g. [! q我以前畫左個chart去答,- T7 x% `* J! H& d  P! N
等我搵下仲在吾在( u5 ?7 P4 y' G) u; P5 _+ W& K& n

  U; D2 x$ z. g/ F% x0 m. z' `當日用左37分鐘答１２粒波子，差７分鐘才合格。
* R8 p* W, z$ C( _13........." \5 N. }/ k3 O

6 k& {, [0 o+ {' I2 ][ 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" V7 K9 m0 e  ^
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我以前畫左個chart去答,
" H0 h8 }2 L  X2 S( _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:
0 I2 ^) C; W! p, t/ ?; @唔識隱藏...已經諗到..

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sor !!!....e加改左$ e: F) w( p- f6 u
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
9 [7 Z9 E6 L, \0 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.) N9 j7 D8 E$ ?; h# L

+ u  H% z. |# E$ XThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.  d5 b; |+ H3 @7 A) E- p* K9 p

/ x& M: Z% W7 h7 }& fThanks

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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

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1-6 vs 7-125 f) a( K5 F1 J, @+ V1 o" A
if 1-6 = 7-12     13 is fake3 a+ W% u+ ^4 Q2 S2 x
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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 $ i6 L2 p0 U7 u' G1 r

* Q& T7 U8 t. L; b1 pThen Weight the Third
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Suppose 4-6 > 1-35 m; _9 P/ ]' p( H7 W  R4 s
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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 1 y: G# Z3 H/ X% O

) d3 d8 {4 U* iif 4>5  4 is the fake one . B% {. S0 c0 C+ w

6 R: G( {# p4 ^5 Vand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4) n( k: h* k+ r2 S* G( o
Group B: 5,6,7,8
6 X$ d1 S  S4 v: _7 {Group C: 9,10,11,12( G0 r+ x1 J! x
Group D: 137 E- v2 t9 q( J: a) R. ^/ V0 x
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Round 1
% ]4 ^$ B3 c+ Y) YGroup A vs Group B/ c% C2 \0 T& q; n) }6 Z, s* u
如A and B一樣, 即較輕一粒在Group C or D1 ^3 D4 \9 F: K- C0 U6 Y
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Round 2# ~# E2 `2 e$ s' X9 s1 }6 w
再在Group C拆成:3 g, [' y$ U+ @; r8 ?* K$ M
Group Ca: 9,109 @6 [- u- q* P( E
Group Cb: 11,12- h4 v$ p8 m/ S
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, & `1 z, v$ l( N! \) D9 j1 H5 K
要再秤, Round 3, 之後便知答案.* b% E9 K" d2 [
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e.g. #1 假設10為較輕的一粒
0 i% E# K+ O  v' e, k' LRound 12 o3 l  C1 V6 J- u1 `4 ^
1,2,3,4 vs 5,6,7,8 = equal
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Round 2' m$ R3 m2 s# V- O+ M( i3 a
9,10 vs 11,12 = 9,10 < 11,12
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) M8 X" l! F2 mRound 39 f! U$ X) V% q) ]/ Y1 b" D% u! Q
9 vs 10 = 9 > 10/ H( \! Y( x; @: ]

! N0 w' X' d2 \) m0 o& W6 U8 b) RThe answer is 10./ G" t5 C2 O. J+ g

9 }- B' M- T+ W2 ~) y4 je.g. #2 假設7為較輕的一粒* k% q, t; ~  v2 |% \. Z  }
Round 1
5 m& T8 a/ [2 C1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 ~. X: g# o; H8 I% T

" P; o0 s( r7 D- d: ]Round 2
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& X/ p# b& T* r! Y( s# kRound 3
0 M8 c% x+ i) P8 o* @7 vs 8 = 7 < 8- p4 V8 i3 Y+ p7 x' c
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
5 `3 y9 m0 J' C+ I' {: T  @Round 1' ~# c, E: J; E& H; V$ a
1,2,3,4 vs 5,6,7,8 = equal+ {2 r. J7 |! k# X

3 P3 T2 `4 e# J+ e9 ]! NRound 2
- ?1 h, a% k6 V! j; ?; i5 z+ @9,10 vs 11,12 = equal
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, F9 `  z9 q  P4 J9 s' L5 K( cNo Round 3
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The answer is 13.& e  Y$ Y# {9 z4 a/ u

! P4 ?/ @6 u1 D0 c2 r唔知我答得正唔正確呢?! 6 e3 W0 X2 p, m6 T
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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:! V0 ^. t8 Z+ u9 a
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1-6 vs 7-12
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1 T/ H! j+ h7 Dif not
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Weight the 2 time ' E* G+ u; S, ?: T8 f4 m. s
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Suppose 1-6> 7-12
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1-3 vs 4-6 1 n- \- d8 E5 K3 N" C, I

) h8 e! d' C, M- X2 K$ Q7 n0 pThen Weight the Third
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Suppose 4-6 > 1-3
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: ^+ k, B9 i$ L8 v- V- ?Just like the first Step
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4 vs 5 7 P+ l' b+ |/ O9 H

  t8 z( H- q5 o; aif 4=5 6 is the fake one
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7 v( D: [, o, e7 _0 Lif 4>5  4 is the fake one
0 ?& q; O! d+ Hand so on......................

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8 e9 Y) l9 t2 E. d" y( ?問題第二步1 ~6 t  m+ Y9 a& `

7 I5 o+ a! q0 u: E7 ^5 ]; H* ?Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: t2 j; H1 t7 j% V- l
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你第三步点去搵 7-12 边一粒???8 t& I4 u+ V& u( P- V
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  j: o5 f) i: V! E% x問題第三步
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  @1 w$ X; }* m8 [* V$ uWeight 1:  1-6> 7-12
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" a; R% U8 a* t5 ZWeight 2:  4-6 > 1-3 3 A% ^$ N! t) t: m9 f

% \+ Q% W7 M' x; K- {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