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. l0 w! r( A4 V1 t" {) i

0 A" `* O8 u# N% j" ^『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)。- L& T, P3 p* w: A: n! k9 R
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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5 Z4 x5 [/ g( H+ [) T. n注意: , m* p1 w+ w8 H+ `

' F6 o% A9 M$ I' \: c1. 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 ^1 |- B9 u; 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  , hide 字要連埋 , 內容 = 答案+ w) L# W/ n1 }7 `; j( {

8 {$ w. ?" w& Z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:. E/ I: B$ o1 ]* E
相信e條題目都有吾少人玩...

# N- q& ?9 M9 B0 [' ?我以前畫左個chart去答,
3 T+ ^+ a  }( V1 k7 o8 q+ ?等我搵下仲在吾在2 P- C8 b2 _5 Y7 K/ |: W% l
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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1 N9 U) a0 }- F7 O2 N[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:$ [+ `2 v- D# O

# E  F. Y+ m+ C/ Q& _我以前畫左個chart去答,  d5 F: N9 |/ X9 t9 Q/ M2 V
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:. s2 I5 o4 d: p" i1 Y
唔識隱藏...已經諗到..

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! R. q3 d- m) v" `4 ~+ ~9 Tsor !!!....e加改左3 n1 {3 l+ D: d) E. C& h6 @4 n

4 y/ M) T7 @% B2 t0 A1 ]7 R2. 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0 t/ o% j( p  t- [; q- T% v

/ B: u$ h3 M9 M+ F[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ i. e4 M6 t5 u5 T' F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:1 m4 ?/ Y9 m8 n# O- M# r$ e
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4 J: m1 C2 ?7 [3 U1 {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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8 k1 m: |( M" H/ R; ]* h不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
+ T$ n1 x: K3 S7 V% w% x+ X! k1-6 vs 7-12% k$ \  [5 M) [- A  u
if 1-6 = 7-12     13 is fake) _2 Y8 p% r* p/ Y

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Weight the 2 time % d% [+ g8 x+ T. e
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Suppose 1-6> 7-12' v3 M5 ]) S2 x

2 W" M8 c) Q, W) s. l1-3 vs 4-6 / s& b8 n% ^4 M7 ]/ Z

2 q: M. |5 x+ ^& u' c1 m7 bThen Weight the Third3 p' |  U8 L; d9 G
3.
  Q7 ]% c* M; O( z9 Q9 o, q) r( x, Y9 w& i7 u' Q' D* M
Suppose 4-6 > 1-3# b( a2 o0 [' w
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Just like the first Step
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& S* \2 |* F* O7 u0 k- B4 vs 5 & ?9 i$ [; o) K& ]" E( A4 R& c$ v" v$ z

+ }- I+ {% y* aif 4=5 6 is the fake one 5 L) @1 _+ e: D$ S: T. q

4 h' l9 g1 L+ zif 4>5  4 is the fake one ! L, p  p; U' j7 {+ V
1 P9 s2 ?! u  L0 R+ [
and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
- N6 l% K5 ?* _7 x* U$ G! F! ~! _Group B: 5,6,7,8, z4 }* S7 v$ J5 Z* ~1 x0 T6 P* {
Group C: 9,10,11,127 W  j* T& x* }
Group D: 135 L- t' `' H  U2 y: \5 {
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Round 1
3 f6 J7 N7 ~2 p2 ?0 h) H2 EGroup A vs Group B
* p4 u! P# R  d* I, s3 y; ]如A and B一樣, 即較輕一粒在Group C or D
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Round 2
  Y9 @$ {- {) C# `8 B4 ^$ W1 [# f9 |再在Group C拆成:
) |* x3 N4 h9 q  Q+ f1 o3 y4 L7 aGroup Ca: 9,10
* U" h- o: Q# B" XGroup Cb: 11,12
% ]+ ?  S2 l4 a) ?3 P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,
+ X/ V; {+ |5 _' W9 O要再秤, Round 3, 之後便知答案.  G% a+ G3 f+ A1 r

' u, n1 s! F6 z: u+ Ye.g. #1 假設10為較輕的一粒9 m5 @8 J. y' C9 ^' y+ y. J7 U
Round 14 d5 E/ b2 L2 \, y8 j& D: C* X
1,2,3,4 vs 5,6,7,8 = equal; a+ I5 ^+ H' e# ]- P& e

6 A- n8 s  m/ u9 z8 [5 O4 B0 DRound 29 a/ f/ D2 `8 M, W  M; w
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
' i7 [% b. ~/ A- @( i( j3 r' ?; L9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒6 c, a( H0 M6 A
Round 1% O  R- I! B& w, }2 E# ~
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 ]; ?& q+ @% w
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Round 2+ M+ C: M( K* D% R; s% Q
5,6 vs 7,8 = 5,6 > 7,8
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Round 30 `3 P* a! q) o6 [
7 vs 8 = 7 < 89 x9 ~8 [/ M3 Y2 Y  `

* g1 q  m% }8 h7 S- P" K" Q" q- p5 n) qThe answer is 7.
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e.g. #3 假設13為較輕的一粒
% v- Q" J: F& w: F% ZRound 1
1 v; U/ Q% z0 R( M( `5 d2 H& [1,2,3,4 vs 5,6,7,8 = equal
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  \" \& S  s- y; yRound 2
% l+ n. y, Y+ W! R2 U* L$ H0 T9,10 vs 11,12 = equal. _; H1 [# E9 G* |* Q# N0 _

) d: D# U. h4 y+ |' LNo Round 3' o/ g2 z3 A& J5 I! g
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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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1 O" M1 p# \5 H  U3 g" X7 b3 @[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:# q! W- Y8 b5 e9 E- L3 I
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1-6 vs 7-12
. n$ f" W5 l  j' ?if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 5 v* D7 {% F; R$ ?5 m
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Suppose 1-6> 7-120 P5 Z) q5 y; e+ c# E! J
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1-3 vs 4-6 5 S! p) Q0 V5 y  _' [& e

* w, S; I( }& `) F. J% ?3 ^5 NThen Weight the Third
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* t1 e+ h* {; b4 b" g7 mSuppose 4-6 > 1-3
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  s4 G* Y+ H* U+ {- GJust like the first Step: i, ?1 r% c3 k+ f3 h
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4 vs 5 6 Q( Q4 {  s, i2 ]$ O

  V$ B5 m, x( u1 Y* k3 _8 Rif 4=5 6 is the fake one ! a# S) K/ G8 _  _
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if 4>5  4 is the fake one
' e( _' \9 L  P( }and so on......................

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問題第二步
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Weight 1:  1-6> 7-124 }/ w  \; i! y! m: I2 n5 B3 Y& B

9 v4 l- x( l% mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-69 d$ V0 `( m$ b* a* W/ a
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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12  U- I. n! V  l) L& q' _. C* v

& w0 ]+ j! c, c; I) C; ]4 f! QWeight 2:  4-6 > 1-3 & P, e4 W0 m% [3 q
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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