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+ E0 u5 N' e- d' l& i! q$ B# a# u. C" D
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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)。
! ?7 r( i; o! y$ b( X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:   G. e2 S( d6 q6 [/ R# w

0 i& @! ^$ g- A5 D% S1. 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% J3 `# w2 t! |0 A& t# {7 X

. `+ D1 B) M/ x# J* t2. 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 21:34:0 R6 `" h4 P$ [/ n- V
相信e條題目都有吾少人玩...

" K/ ^: |6 C& ]5 Z2 e, A我以前畫左個chart去答,' D8 [0 E- f  `! J* |3 U
等我搵下仲在吾在- k, J, c4 n# h

- r2 G# G! v8 D) {4 V當日用左37分鐘答１２粒波子，差７分鐘才合格。
: ~; ~/ F  X3 l; d13.........% O6 P9 Q2 e% f) V
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:  r- z. P' {$ q3 }+ M4 O
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我以前畫左個chart去答,
) \, L5 w  f  S3 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:4 E: p- ?& d3 O1 o# s! j9 p* c
唔識隱藏...已經諗到..

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sor !!!....e加改左# j% `  p4 f6 Q9 n5 e0 l) g* `: t
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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( D; d3 p4 \3 X2 |+ H

" [3 P" Q% @# z[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:5 g. t7 J7 g7 v4 T2 v
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./ c* q1 O7 E- E  p: v; j
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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+ w5 N7 D8 b, l- z: b) k/ PPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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. P0 {# q0 e8 o- N4 f/ F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
" a' S! c- K% Pif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-128 t* y% M5 M1 e5 o/ |& O& T) j: p

/ B- c* ?/ T& a( ?/ i. n3 U1-3 vs 4-6 . g5 k" s: n( {

& X- H) I' U1 X9 w5 A+ PThen Weight the Third6 N# \3 V" J6 G# F) l  {6 R: Y
3.
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Suppose 4-6 > 1-31 o2 {8 G; K  }0 W* u: M$ C" u

. m* a4 C7 G9 T' G, RJust like the first Step7 M" ?: S' Y. Q9 `5 {" ]) Q
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4 vs 5 " ?4 G) j; m: }1 u1 K/ y+ b4 l
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if 4=5 6 is the fake one $ b" D6 b% @: [% e
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if 4>5  4 is the fake one
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4 R! v( G/ Z: d9 s3 D# Wand so on......................

hello1997

分3組4隻波子秤- j- z$ C) y; \! a. U

# \8 G' v: E( I, e( P! c! r8 aGroup A: 1,2,3,4
1 ?0 D" u: \3 L3 y! x0 v5 d* M  hGroup B: 5,6,7,8- J" ^- Z- c  S! Q0 ]7 X9 y
Group C: 9,10,11,12
! b: M* a) k' M, V7 y/ [! [/ dGroup D: 13
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" k4 d" b! ]+ ^$ g) s; w( FRound 1
2 h- n6 \) i: A# LGroup A vs Group B2 w+ u7 x! J4 v9 W9 R
如A and B一樣, 即較輕一粒在Group C or D4 q+ p8 Y) ^- r" {

1 r. i1 o- M* ?5 v& t6 B& pRound 2
: s% a0 F$ r* A+ d. I) V; s8 |再在Group C拆成:& H3 G/ K$ W; @3 }3 ?1 `3 O
Group Ca: 9,103 X+ e0 C& X/ E+ U6 H4 h/ N1 B
Group Cb: 11,12+ O2 S, B! [( X' K7 u9 |# R9 l
然後再秤, 如一樣, 即13為較輕一粒.
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* j6 ?3 o+ k1 q  U. D" r% v% v如不同, 即較輕一組有一粒較輕波子在其中,
7 i8 |. @# q0 a7 n8 l. ]5 G6 c) z要再秤, Round 3, 之後便知答案.$ p* h' ?5 M7 {. @  A6 X

, V* V4 h5 N4 ~7 _e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal" T! G5 I0 o' L4 b& j! X

- |7 t# M3 M, @+ p+ C. l" l2 n/ I( ^Round 2  v% w. i! V4 @- C" I
9,10 vs 11,12 = 9,10 < 11,12
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, K. d3 \/ ], ~6 g; B1 |8 ]Round 3
+ ~" V, Z' H* H" q, D9 vs 10 = 9 > 104 b0 C2 l+ T) X1 {# T; r

! ~4 p! u* i% q+ {The answer is 10.* q4 `" i8 d& c1 f0 a! j+ w9 q
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e.g. #2 假設7為較輕的一粒+ ?( T3 F2 T! Z# `6 y( Q3 v
Round 1, p( A9 X0 q" u* C. |1 F2 e; C
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8( R5 C2 E" n% l6 f/ x* P- y
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Round 2) }. u0 |: r1 Q7 n  M" Y8 @
5,6 vs 7,8 = 5,6 > 7,8) E" l. a/ p& ?. n, b
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Round 3& L9 Q( X& y. a- f) b
7 vs 8 = 7 < 8
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( ?7 Q$ v4 m6 @6 H, l& |, z' `9 kThe answer is 7.
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e.g. #3 假設13為較輕的一粒5 F7 l, L0 w4 @+ J7 u5 C
Round 1! q( H8 b# m5 ^+ ]$ r, Z
1,2,3,4 vs 5,6,7,8 = equal/ G; x8 u4 c7 ?6 R) I
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Round 2( O. j9 u: ]' L( q5 y
9,10 vs 11,12 = equal
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No Round 3* {: m: |- [/ U- W% y
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The answer is 13.
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唔知我答得正唔正確呢?! & c) B' r8 i2 d8 w. E

& C! t4 y" n. U7 y  Y[ 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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1-6 vs 7-12! Q" c% S0 ~8 A( T5 E5 }
if 1-6 = 7-12     13 is fake
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) {0 h8 b* |. W6 ]2 Mif not
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Weight the 2 time
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% _4 e6 {. h6 R  Z  @2 J4 A! ]Suppose 1-6> 7-124 y) z. _' x/ ]. F& b# W
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1-3 vs 4-6
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1 L9 o7 ~7 O+ S$ M& ^1 E( pThen Weight the Third
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, I& Q9 k3 A9 {" U! ASuppose 4-6 > 1-3
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Just like the first Step2 z1 T, q* q# ^% s9 P$ g% C) h

- \8 N9 T% t8 h" {8 V4 vs 5
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if 4=5 6 is the fake one
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3 E# E: p) @# m0 p+ M3 aif 4>5  4 is the fake one
# p( r2 l; ?  Q/ `- Q6 O  |$ rand so on......................

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8 Q# A2 x3 i  N  |. }. j問題第二步8 A6 @& B# a4 P5 E- o

4 D% W2 C/ ?6 o% v( ~Weight 1:  1-6> 7-12
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6 }$ @: D* U# O& r0 l$ tWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6  P) l2 I0 m& \1 O) G; `

3 A  u9 S* u: V/ R你第三步点去搵 7-12 边一粒???& Z, S6 c9 [: K% |( M( Z  Y

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問題第三步4 y. z0 ?4 M1 X& _/ x4 _
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Weight 1:  1-6> 7-12' ~8 _4 j, z# J) q

# B% W0 Y( q! ~- ?1 q3 x7 C7 o, D, v9 jWeight 2:  4-6 > 1-3 4 ~3 x4 P/ T: w  }, U' ^
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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