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
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& W4 B- L1 r- y. a『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)。
) @% z4 _3 m- S4 O9 w9 u; s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: 0 b& [0 U' u! Z/ ^9 a: t

4 j% Z: V  h+ }8 r* I" _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7 H# L% X8 X+ Q1 z
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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; o% o: y: r, l) `

8 ]2 F3 C/ `4 i. d. [* z- \[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:, @" G0 a1 a; R3 x" S
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,
# ?  `; g# Z( p) _8 e. u2 S等我搵下仲在吾在% z. x; [+ B4 ~& j) q2 H  b
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當日用左37分鐘答１２粒波子，差７分鐘才合格。, E: `$ _# Q' @# B0 ^4 D
13.........3 c* j$ O+ }8 J( u7 M+ R+ q

4 ^# W0 n. z. J5 g, U[ 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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- j) |, T1 U$ ~6 q2 a我以前畫左個chart去答,
5 M3 `, d+ r- _' }8 d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:
, Z/ }1 V0 x" N/ }7 Z6 {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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
# A* J* E9 N$ w' d4 r# E0 s相信e條題目都有吾少人玩...

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2 x4 T- T& I; @; ?1 s% O' HPlayPlay, Let me know later who has the right answer and I will add points accordingly.* K% e% {0 o8 J! c  d+ O& f
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: m1 e2 |4 g5 M1 ~0 c

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PlayPlay, Let me know later who has the right answer and I will add points accordingly./ Q: V1 Q6 v2 K3 Z- J+ L0 ^& a1 v

% I% T& @/ _+ f! C3 fThanks

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: o7 V" k: n" Z+ d! N3 q" F不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
  b6 |0 m3 h* K5 N+ r$ @5 x: {1-6 vs 7-12
/ b: m$ X2 o4 G' Xif 1-6 = 7-12     13 is fake1 z+ H$ Q, j  ?  o9 s
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1 f# e& Z9 M" E) O( ^% {7 zWeight the 2 time 5 B. F! w4 p$ i* L0 a* V

4 w, w" U5 m: p- s& e% QSuppose 1-6> 7-12
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; `' n8 B. L7 R+ Z; h1-3 vs 4-6
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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
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4 vs 5
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# G* m' G+ C9 b0 a5 Mif 4=5 6 is the fake one % ]. m/ j) Q$ @+ a  A0 z0 ^4 ]/ q
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
0 K3 S" J4 |5 S: u! PGroup B: 5,6,7,8' ^8 \8 j" {9 I" \4 D; t
Group C: 9,10,11,12  Z* p# t( }" O
Group D: 13
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Round 1
+ `! x& w5 Q1 c* K; xGroup A vs Group B2 v) J* r* |: T
如A and B一樣, 即較輕一粒在Group C or D% N4 g" P- C6 _) {! G8 g
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Round 22 H3 p0 I. t9 d% @6 `
再在Group C拆成:
8 I  K: ]! I) ~6 S- A0 d3 k9 A- \Group Ca: 9,10
5 ]( _" a0 K( @/ {8 MGroup Cb: 11,12
+ D) \) H' \! U' u3 e# Z7 Y4 P然後再秤, 如一樣, 即13為較輕一粒.
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" F: d8 E* [: C: h) T* a( h% D如不同, 即較輕一組有一粒較輕波子在其中,   C9 p, ~2 b* t
要再秤, Round 3, 之後便知答案.& w# W8 y3 i, g" w# ?$ K! ~: W2 O! B

* S9 W; g& l" {# j3 D0 ye.g. #1 假設10為較輕的一粒1 m) Q( w" k7 `- }0 {; q
Round 12 k; ?' L# |( Y) S8 D& Y# A% N
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
& k; r/ `7 T7 r9 P5 ~9,10 vs 11,12 = 9,10 < 11,12% _0 v( i( U/ u1 W
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Round 37 F8 O0 ^  {. [$ @8 t8 A
9 vs 10 = 9 > 10# W. ~& J9 c0 G1 P) E

' Q0 z. w/ p$ _0 QThe answer is 10.8 f3 v" [! |3 l8 T0 o
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e.g. #2 假設7為較輕的一粒  F1 ]  _  C& u; j4 I5 O
Round 1- e' @7 D/ ?) @% Y% W) E. I
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,83 c4 v( ~* M7 W1 f! l5 ~9 \( c

& `& v& r& R) E. n; e# V! URound 2
7 C, J4 b2 h, q, ~0 j+ H5 _" G5,6 vs 7,8 = 5,6 > 7,8
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3 Q5 T5 \8 {9 y1 }; i0 K5 P6 M9 x6 IRound 3
! p3 V; A3 S/ u  d9 o2 x6 Q( r7 vs 8 = 7 < 8! E# @& h! V1 M; V

$ r* Z& j. X6 F" R4 {# ]3 zThe answer is 7.& a% p6 ^, Y( A/ L
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e.g. #3 假設13為較輕的一粒# }, S; c* P/ \6 |! V& `
Round 1
/ A+ l; x% ~2 c9 T$ g1,2,3,4 vs 5,6,7,8 = equal
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Round 23 e8 Z) Z. _6 C6 A
9,10 vs 11,12 = equal2 d, b, U: |- k
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No Round 3+ }0 L1 Q; n2 }8 W. V
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The answer is 13.
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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:# R% V) m/ Y+ U4 t9 b) z. ]. m# r
1.
1 Q  N7 v8 i; ~& u1-6 vs 7-12
6 ?# M0 U! B  q* `if 1-6 = 7-12     13 is fake* `5 I7 _; X! n( S  M0 D

2 f( n( k% U7 s! Nif not
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Weight the 2 time
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9 u2 h7 |. m- I* y$ S1 ?  \Suppose 1-6> 7-125 T8 Z" d8 s* s
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1-3 vs 4-6 5 d* M+ Y. X8 r- }3 C
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Then Weight the Third+ ?! D. l5 t" a8 a3 w
3.
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' z0 o. ?$ m  q3 H( g% \& _+ {  `Suppose 4-6 > 1-3" D* l8 R5 l  o1 g9 J$ G9 _
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Just like the first Step
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if 4=5 6 is the fake one % h4 y& l: J  t  K4 t

9 q0 P7 t4 F0 v/ {% E& gif 4>5  4 is the fake one % a7 g0 s9 H4 ]# g- |3 q. V& i( o# c0 c
and so on......................

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' Y% A* |* q" q0 G$ q3 a* B問題第二步
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4 ]' M" R* m9 O  z+ m5 \* wWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-60 X% S4 S+ i1 u8 f+ v

% b7 c" s. i$ l你第三步点去搵 7-12 边一粒???
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========================================
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8 z: Y) j. Y0 `問題第三步& H! X1 }( f% l3 J" g( L4 X7 ~

4 v/ j6 H, @: ^: X9 @Weight 1:  1-6> 7-12* O# T6 i- Q$ ], b% O

  Z9 R' u& u$ x9 |' A6 sWeight 2:  4-6 > 1-3 ) M* i9 S& L: D. L4 {) K4 H2 d6 {

0 K5 r/ D" c. \+ P0 {: s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