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, \5 c1 |) U* o" G& I) s

& `! j1 l. {$ P6 z0 O『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$ d. S" E' n! e& z6 o
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？』6 Q3 Z5 a+ k" u+ l4 D& c/ F

5 X0 ~4 n. F* A3 C" J! Z4 t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
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; Y) |/ B2 C+ z% f/ f2. 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:% D" \2 D+ k' Z$ s+ N
相信e條題目都有吾少人玩...

1 o+ i7 T% U. c8 N, M2 l我以前畫左個chart去答,2 I6 H" M! [, R# X
等我搵下仲在吾在# ~/ X, S& }1 V) I7 h

- o4 q, P: g4 v8 z2 W  E當日用左37分鐘答１２粒波子，差７分鐘才合格。7 J& S+ f! O! a1 `/ M# m+ t5 t
13.........* I- ?: c* \+ ^, v& S

+ O: R* Y2 @9 b! ][ 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,
1 ?2 G! N3 l7 v  r& z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:: C' Q1 `3 m+ u
唔識隱藏...已經諗到..

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sor !!!....e加改左* b" u) d" r2 l. q- H1 C( r  [

7 a8 B* o5 E$ r8 O2. 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 [; `& e, i5 J

' C8 @0 b; [  p' ~- Q; y$ ~5 x2 h# ][ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
+ M* K7 O! Q; K0 I相信e條題目都有吾少人玩...

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5 r3 E4 C, K- _& EPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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6 x1 C* C$ R  g2 [+ [: IThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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( Z& P4 u( H+ U# o  LPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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' \/ X" Y9 R5 t4 f不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
* i9 C9 p! B, G8 y$ w) D1-6 vs 7-12
" N& j5 }* o; G( ?( T) Tif 1-6 = 7-12     13 is fake9 m! y* m! W7 G
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if not
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Weight the 2 time 2 G; a7 \+ z$ R7 G. Q* V

0 f0 x  P( E" r) ?+ ISuppose 1-6> 7-12
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8 H6 r$ U' ?0 w# D& L1-3 vs 4-6 ! M5 Y' N- ^7 x' t4 _
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Then Weight the Third  d+ _: b. g9 y$ M6 Q
3.
0 I* N4 J$ V. \* D$ u4 }0 H8 \
: U- M, F* L* H1 g6 ~Suppose 4-6 > 1-3
* Y! K) i5 f8 K" Q; p- l( e, i3 L) K* s; {3 T. k8 P! j
Just like the first Step6 b9 q/ Z/ X2 C  C/ M; A

  S5 f' y! N3 q6 S4 vs 5 6 O* p! D/ j; V- W5 {9 W5 x/ _

" ?: O% u. w2 h- b! y2 pif 4=5 6 is the fake one
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if 4>5  4 is the fake one ( J; p; }  q7 |( u% B" N

" R" Y  O9 @) \* E! gand so on......................

hello1997

分3組4隻波子秤4 ^0 @0 t  z, o
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Group A: 1,2,3,4
3 f% j& h1 F7 F8 u  p0 zGroup B: 5,6,7,8
2 i- O% n$ e: q7 O  l% p* b- \Group C: 9,10,11,12
, A- S7 C, k% S1 n0 m' |Group D: 13
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Round 1: {- o9 J/ _' [3 y
Group A vs Group B
6 n+ M! b) R+ p% |- ?如A and B一樣, 即較輕一粒在Group C or D2 y7 Z! Q1 O& l  `# Y! g( ]* a* `

# Y5 N" I9 A$ }1 PRound 2
; o5 h/ K, o; W$ t* D: v再在Group C拆成:
$ Z3 }, Y+ W# t7 C5 X" HGroup Ca: 9,10) H) F- Q6 b5 }3 Y- i
Group Cb: 11,122 e  N2 }% w8 V/ L+ t7 C8 M
然後再秤, 如一樣, 即13為較輕一粒.8 D9 a0 d) d/ {# g7 O1 [. B+ D, F, t! ~
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如不同, 即較輕一組有一粒較輕波子在其中, . k/ T5 [" Q0 E& a& v
要再秤, Round 3, 之後便知答案.3 h7 a! f4 l; b7 ]# @5 X; J  Q" j

) E# A3 x2 Q$ E# m( Ue.g. #1 假設10為較輕的一粒
2 U$ I' [& I1 O, N3 D/ V% `  jRound 1* Y; V! Q: N4 Q. I6 g7 S& ?2 B" H( K& o
1,2,3,4 vs 5,6,7,8 = equal
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- V2 z. E  a% X6 c6 F+ P, bRound 2. s& q) ?, H# v* a
9,10 vs 11,12 = 9,10 < 11,12
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Round 3; ^4 a" t; s/ j( v2 `& U! K( K0 M
9 vs 10 = 9 > 102 I' T1 B1 P2 b7 d3 }7 k2 x

* X/ h2 B+ `1 Q* n0 ]" \The answer is 10.* [  N# n& h# B/ d( V+ G

- n3 E# [0 y% g: i0 \e.g. #2 假設7為較輕的一粒
% D% ^! ^3 T- t; y* hRound 14 r3 |: T/ K) x0 H% ]
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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: d* b* j' B$ j$ @% h1 hRound 26 W5 K0 w% l8 \+ b- p. w6 s, W: {. ]
5,6 vs 7,8 = 5,6 > 7,8" O0 M1 Z2 W* c% s! s# Z& }
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Round 3
, |0 Z  i- ~* p. Q) H# _7 vs 8 = 7 < 8  e7 f9 T( N# F8 L+ B: B1 K; w) I: s( ]

" T: z; g" H% l& k' ^- KThe answer is 7.
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e.g. #3 假設13為較輕的一粒
! z, c$ v6 n4 C5 b) Q, n" W+ Z+ ?Round 1- S. z& F6 V9 |+ i
1,2,3,4 vs 5,6,7,8 = equal, s! Y+ i/ E! e1 S, r, k

/ x2 U4 R+ R* Z/ |9 {Round 2
' b# N% _0 B6 C3 T7 V9,10 vs 11,12 = equal$ r% ?. ?+ o1 V8 [0 G' ]2 }& H

9 `# ^7 |/ {8 T" s! G# t, VNo Round 3. a; h0 `! B7 n

/ W5 l; J0 b. `$ A: [. FThe answer is 13.
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4 P0 b* R- P0 a8 e" m! Z唔知我答得正唔正確呢?!
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4 K; z  u8 W/ a; M* k- i% y) s[ 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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) w& r9 p' c2 q9 l- {. y8 e6 A1-6 vs 7-12
6 q1 q8 v  _+ Lif 1-6 = 7-12     13 is fake
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+ m  a* P1 }5 kif not $ V5 x0 [+ [+ D- z, M4 z- A: @- l2 F

9 g, N! [! y! O7 {, O/ PWeight the 2 time ; K) T) h1 @' B" N8 x8 p# e/ r
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Suppose 1-6> 7-12
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1-3 vs 4-6 2 I5 E$ R- ^% A4 v$ W9 ^

9 T1 @" Y- x! j& f3 aThen Weight the Third; ]" ]! U! t, {9 f2 X
3.
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2 e# Q$ p. V# b! ?. rSuppose 4-6 > 1-3
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Just like the first Step2 ]8 m& @/ j$ ~+ V
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4 vs 5
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if 4=5 6 is the fake one
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! I/ W. r) [& W  U! _1 uif 4>5  4 is the fake one
+ p0 U1 n. h$ X9 s* `and so on......................

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4 Z; _" M8 v8 W/ V, }( x問題第二步+ `0 X3 m) {4 L

  ]* d( H2 I1 W) SWeight 1:  1-6> 7-12$ }0 U% d6 K8 r

# k+ J2 {# D% v9 RWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ N  I0 v  _6 M0 A8 O. K4 L( V( Z

* b. r* C# a' q1 |/ P你第三步点去搵 7-12 边一粒???
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/ L6 c2 a+ y0 `% W8 w  m9 E! @========================================
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1 H8 V7 M$ A+ Y" J7 [3 Y" u問題第三步4 [) V3 R8 A2 X0 n$ s
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Weight 1:  1-6> 7-12
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! U8 k+ q8 H4 O6 C& lWeight 2:  4-6 > 1-3
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* ~- O9 I4 z: M4 z3 P/ _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