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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) j1 @3 q+ U( x; S7 a1 [; p  G『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! p; r0 g! @1 u* t+ z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:
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9 c; Q( v# y8 ?  m; q% r$ V& k7 P1. 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4 n6 N3 O) P  {- a

8 b: z! h$ _& s2. 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  Q( b: A2 B7 o* O

8 \8 m' _) `. f$ h; y: E1 W" s9 J[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
  u* F% ^/ y; p. J3 `0 T& Q/ l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,
. s$ B$ M  X$ A- t" o7 @& m等我搵下仲在吾在1 u. n' m  s; a1 ]6 F- y1 j

# e! Z0 [( p8 C當日用左37分鐘答１２粒波子，差７分鐘才合格。
2 F& w3 Z: B4 t' E$ P  V7 ~13.........4 \% s2 z: b/ [5 J! c

+ R, F: H( o! q* D9 J[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:0 k2 H4 I/ F" s: _, N8 d) ]2 y
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我以前畫左個chart去答,
9 }5 q4 l/ e) `( d1 n- S" 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:' T; m. a1 {! L7 b4 p0 F
唔識隱藏...已經諗到..

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sor !!!....e加改左
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' f" D7 A+ T$ u2. 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* h3 M; u, t: s& v0 e7 d6 j

5 V5 H5 [# O& g) G/ `[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:2 n& |6 N$ m# C/ p0 R
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.$ M% ^* ~2 l: A2 Y" O3 O9 J1 e

. L, h* F( i) r+ z- s; ?( o: T& c9 ]Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:4 w6 K4 k7 A$ R  Z$ E6 M
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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 7-12
  c* Z* s, w, b$ Zif 1-6 = 7-12     13 is fake
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Weight the 2 time
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3 }' N6 ]" O; v- ?4 ]Suppose 1-6> 7-12( y' e: t" n9 {& m3 N
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1-3 vs 4-6
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/ U( i" P* p# A* rThen Weight the Third, l7 C; ?! G1 r/ Y3 b
3.
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; z! |8 T& B: s- CSuppose 4-6 > 1-3$ X; x& K9 V/ v: y8 y
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Just like the first Step
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4 vs 5 5 j( P+ Q) @4 f

9 o2 e1 j! p8 W! j& bif 4=5 6 is the fake one   c8 M# K) t6 p: R, T$ u" t

2 `3 M8 e, H7 K9 U( zif 4>5  4 is the fake one ; w/ w9 G- S5 p( Y+ ^. U+ h' O
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and so on......................

hello1997

分3組4隻波子秤/ j! Q, q4 E$ i
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Group A: 1,2,3,43 S5 C" j& W5 L" F
Group B: 5,6,7,8! C5 i- l: m. u  f
Group C: 9,10,11,12
% ]& [: ?) @: n& [* T, m8 qGroup D: 138 R' ]" ~9 e0 g) m% I/ O0 y2 n* m' a

; |6 p5 U9 M( B  o7 g9 f( xRound 1
3 ~* p( P  f, A# TGroup A vs Group B" W- `* E! P: t' N7 Z" P: {: e
如A and B一樣, 即較輕一粒在Group C or D. M3 O0 p$ [. F

) L, z) N; ]! F( \" y$ Q+ PRound 2
3 J/ e, j& a) \. x& f再在Group C拆成:
. {. H# u# o& Z0 M$ J+ f4 h4 MGroup Ca: 9,10
; _- \* C2 K5 f9 I, uGroup Cb: 11,12
5 r8 {6 [) d6 {" H7 o9 M: |' C然後再秤, 如一樣, 即13為較輕一粒.3 D5 }# B' M0 ^& k6 E
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如不同, 即較輕一組有一粒較輕波子在其中,
  p/ R* B( {9 _3 l* |  ^7 T6 f" _) o要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
3 a7 K3 b; s: m7 w9 g. j* uRound 1
0 ]! b. r8 g6 E5 g4 P1,2,3,4 vs 5,6,7,8 = equal
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Round 25 O/ Q; t/ B% f5 H5 N
9,10 vs 11,12 = 9,10 < 11,12
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1 e6 Z5 l5 a3 w3 f8 fRound 37 R+ G! A0 {+ f6 b  A( q( T
9 vs 10 = 9 > 108 }0 ?9 e: p% d
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The answer is 10.3 e1 [- e( e- L+ m- b* x" r" P

$ a6 T# E6 Z" p0 ke.g. #2 假設7為較輕的一粒4 _; O* t8 g. e* Y
Round 1
! Z/ Y2 P2 B; W% [5 @1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
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' p% z) m& g  Z3 L" hRound 3
% T6 `% q' C% |) ~9 |7 vs 8 = 7 < 8. `! \/ X. b' X0 t, E
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The answer is 7.$ d9 }- D  Q& S; H3 q/ ~3 P

" v; \; U( L& x0 z" ze.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal% p' }) V# N+ G+ B, ?2 \% Y( z
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Round 2
) m$ F, p) ]) r5 n$ v  c9,10 vs 11,12 = equal& G0 p9 k8 O, ^: x* j' q0 y

8 Z: S- @2 u. {  k% W- A7 bNo Round 36 Q5 E3 ?/ Q- R6 Z* K% W" P
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The answer is 13.! T6 K( x; C! g! T* x

5 E$ j  M/ i  Q; \1 h' w唔知我答得正唔正確呢?! 5 E0 q0 u3 T  S8 d/ c

- Y8 Y) K7 I2 _* n[ 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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# ~) h! L: R% ]1-6 vs 7-12
5 ^6 D! v  }/ yif 1-6 = 7-12     13 is fake
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' w: a. h* Z1 P, H9 fif not
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Weight the 2 time 4 Z4 N* b% P6 L1 n; ^  p
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Suppose 1-6> 7-12
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0 o( _/ N% Q- s$ x% J1-3 vs 4-6 / ~2 Y1 c1 u4 d9 u& D4 l
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Then Weight the Third
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Suppose 4-6 > 1-30 s: e2 B$ w. u5 E( b) T
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Just like the first Step0 d5 V3 Q3 z& f' Y5 X" v
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4 vs 5 2 {( k6 [, D& A" k

" N6 i, T: H3 K. {! c" Nif 4=5 6 is the fake one
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4 G( N# N3 X/ ]9 x) H* V* Qif 4>5  4 is the fake one : U" Z; V9 Q1 s
and so on......................

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2 s; j/ k% m( v; k# q+ B+ v. d問題第二步
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6 X" I& }' D0 _/ tWeight 1:  1-6> 7-125 M; T" C1 {# f

1 w- j% c5 ?' b! U3 B3 xWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6* K4 ~- j  D9 v0 E- [
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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3 ?: F* {. S$ L1 l; l2 h

4 r6 S( W3 ^2 D9 z6 fWeight 1:  1-6> 7-127 R$ [- ?- i* f  w, F
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Weight 2:  4-6 > 1-3
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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