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1 e; [8 ?2 P$ I
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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)。
  b& i3 H* t& F4 D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？』, Y8 Z& u- D2 R* _$ a! k7 R) t
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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( w. i; i+ R8 |9 S  k6 f3 G
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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; a6 k$ z8 D! s: J8 v1 N/ o' Q% G* J
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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 V5 P0 A0 z$ u' w+ a, K相信e條題目都有吾少人玩...

) \& x! j/ A5 k; B0 L我以前畫左個chart去答,% D( N+ X# R0 y7 m- g5 e5 p
等我搵下仲在吾在
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2 _' }9 `0 q2 {; G1 k當日用左37分鐘答１２粒波子，差７分鐘才合格。* @0 x+ @1 c8 k$ S/ y
13.........
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+ p1 K3 r, f4 w, I! g9 x[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:3 g2 {1 i4 D7 E' ]! L

* U2 A" l- i! R) M我以前畫左個chart去答,9 a  _" b$ G* g+ d) R6 L
等我搵下...

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2 {0 R% ~0 B" Q0 X: P7 ]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 v0 x6 w6 F" ^% S6 n
唔識隱藏...已經諗到..

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sor !!!....e加改左8 B& A6 \0 l# M! \' V+ n: o1 x

  i4 o& l* P* o" Q2. 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:
( P8 k* W* N; k' o% {) ?相信e條題目都有吾少人玩...

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0 o; Q6 x0 o- L" e  `: E. qPlayPlay, 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:
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& d! ~9 q  t& Z+ r+ q- xPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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! u4 g7 e! n3 d4 c1 f, k3 E3 m不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
& K, C4 D5 |! _& }  I) f1-6 vs 7-12' d3 A0 M+ G6 v. H* K% Y; w. X
if 1-6 = 7-12     13 is fake8 ^: A1 H* j. H+ J5 P
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if not 2 N/ |1 X8 [% n/ p* @0 a1 ~7 q: Y; Y
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Weight the 2 time
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Suppose 1-6> 7-12; K* ~0 k3 @. ?# g

6 J9 Z$ ^: Q) @( K+ l1 {0 g1-3 vs 4-6 6 K3 F4 U! y7 r' ^

) `/ r2 p' @/ c3 R, K8 [Then Weight the Third
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4 _1 O9 C' Z( I- ?/ _6 G* g2 v$ S' xSuppose 4-6 > 1-3% e5 m  v, V$ A9 @
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Just like the first Step; f& k( v3 B# `1 v7 c
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4 vs 5 8 o9 O4 R8 Z5 c, |% C# `; w/ m

. Z  B; x% t& n% v0 U2 ?- q( L8 k7 hif 4=5 6 is the fake one 6 d. z6 f- I  a  }% G7 ~
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if 4>5  4 is the fake one
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. h5 M; e' {! H: S& X% kand so on......................

hello1997

分3組4隻波子秤2 m/ X0 L# L. y9 L+ q, a" P& |
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Group A: 1,2,3,4
+ S& b2 L! Q! P: b+ }* BGroup B: 5,6,7,8
6 ^$ k, }7 X% @8 e  B; }: m% s6 y$ fGroup C: 9,10,11,12  H, x! C/ o) ?! r1 X6 u. Z
Group D: 13
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" {# G6 I( z. f1 \8 Y6 z4 T5 l" JRound 1% Z, a$ Z! Q+ Y( V" a8 k
Group A vs Group B( K* Y3 X0 B9 t3 n# g
如A and B一樣, 即較輕一粒在Group C or D4 z8 v  y9 }' {4 e. h; X3 h( ~' X

: w: n! Q# i  ~4 x: IRound 2- Q! V+ r9 q* G+ c
再在Group C拆成:/ v" B, K; A  [# {% c9 ?
Group Ca: 9,10
, x' d+ s7 y! X( ?) f1 wGroup Cb: 11,12
- B- J, n! {- H3 e8 i( v( d3 e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,
8 b  F, Z. w8 J3 G6 ^要再秤, Round 3, 之後便知答案.* U" X& V3 O% s, }0 j' x! H& \/ N5 ]# O

/ P* ]7 t9 V! m% ]; @& P# g' `e.g. #1 假設10為較輕的一粒
. E5 g1 M  `& t5 W( q: K; U; p& U- X. V0 nRound 19 `1 p$ I$ Z; j- Y7 _  c* x
1,2,3,4 vs 5,6,7,8 = equal
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Round 2" e6 O1 o4 j: @1 P8 S, u# p/ \4 S0 d
9,10 vs 11,12 = 9,10 < 11,12
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7 t1 ^. F+ [8 A& ZRound 3
+ C; K$ p& U* o6 c% {1 k9 vs 10 = 9 > 107 h0 v/ a, ~/ H4 g3 W; N
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The answer is 10.
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e.g. #2 假設7為較輕的一粒* R0 S1 Z) A0 T6 M; p# c$ E: N
Round 1% S7 c  f" x* \4 n
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
& Q  ?- `2 u( g' O0 L* I5 u5,6 vs 7,8 = 5,6 > 7,8/ s1 w7 y& _# P* m" ^1 ^

  x- s" K4 ]. ^1 U0 f- [: S. vRound 3
: F" ^7 ~% J) u$ i* z4 D7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒8 \# U% u$ ^7 E8 e! a, M' ?# R# S# S
Round 1
' U0 q: i9 N6 G+ ~% R1,2,3,4 vs 5,6,7,8 = equal6 C/ ]4 z+ e- @/ {2 ]4 C
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Round 2
/ e1 ?& m9 `4 G9,10 vs 11,12 = equal
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- X7 E- F; q- q  q; I7 |No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! ! L9 f) v7 n  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:7 a6 [, q" s6 V
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1-6 vs 7-12) d$ T  l% V( }& q  u; k
if 1-6 = 7-12     13 is fake# c) p- H0 K& R# K/ W
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if not
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0 ^3 Z% l2 d* ?' J0 [Weight the 2 time * B, m& L: x* A" M0 k

) j- O3 A/ P& P) gSuppose 1-6> 7-128 k( H0 H3 q1 Q# H

" N0 e# u- O9 ?- ~* ?" \( s1-3 vs 4-6 $ L, {4 w! ?" }/ Y
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Then Weight the Third- z; s# ~5 `1 t9 z& D
3.
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Suppose 4-6 > 1-3
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Just like the first Step9 \+ T/ x  [+ P4 w& K! _) q6 b

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if 4=5 6 is the fake one ! c4 w# k6 a  b8 T

5 A- o: J* |: `! h" d3 @9 P% I5 {4 oif 4>5  4 is the fake one 4 H" A4 l/ u6 n9 |# j& y& e/ V
and so on......................

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問題第二步
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  e5 _, g9 S9 Q5 h+ i; [Weight 1:  1-6> 7-12
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8 j% N6 G+ n  BWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6, U6 f- a2 {$ [/ |- H) p
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你第三步点去搵 7-12 边一粒???
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8 Y. S' X& A; v2 L3 q2 e; q& o========================================' a( S2 _: _( k& y8 _, W+ g. G

! d, ~, z1 M. F問題第三步# S4 J' I2 ~8 `2 X4 k! O

  l6 A8 H  U! p9 h' u5 WWeight 1:  1-6> 7-12
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7 f! Y* [% y* w  DWeight 2:  4-6 > 1-3 ) q$ A. J4 M8 V0 a* i

5 b' r" W% n( V' n2 n( ^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