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9 z: q8 @: x5 e" K# 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)。* y6 s2 e$ W0 V' {: Q
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？』4 O$ g$ s2 K  p. [. r6 ?
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注意:
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5 `9 S8 }0 B( ^6 d# j1. 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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# X" Z+ l$ |$ p2. 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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1 V4 l, U, B5 N- ?[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 b9 F) M7 n0 P. T4 ?8 b8 ^相信e條題目都有吾少人玩...

( n: @& [: W8 U( L$ `我以前畫左個chart去答,, c  V3 ?. w7 j! n8 y3 n
等我搵下仲在吾在
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5 H" [# q% q; a5 ^當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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:
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我以前畫左個chart去答,) L( _' R* H1 G$ e2 R
等我搵下...

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$ D9 c7 X0 T9 r: K: b' k. a7 s9 `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:
' n) r3 Q- S1 A# e" Q( [唔識隱藏...已經諗到..

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sor !!!....e加改左( c# u1 f4 t  D2 s

! i1 |. d$ m5 Q- B. F7 F7 K5 W2. 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:
1 T. C  i7 q: ~) ?! K! T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:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.; {; y' X7 Y2 f9 r" O3 s

# h/ a2 s; x- }! m- |Thanks

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8 U. ^+ P* P( u+ c不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
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5 F: I) ^' d9 R$ e$ _$ y( l7 u+ Pif 1-6 = 7-12     13 is fake; Y& b7 f8 {$ C6 V9 x1 \
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if not
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7 u6 m3 Z3 z0 `3 s5 ?* hWeight the 2 time ( d2 b4 z; l3 E% [/ X/ F; {6 [
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Suppose 1-6> 7-12
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( J% ]5 X! N4 ]* A/ R' X/ G- ?1-3 vs 4-6
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Then Weight the Third
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5 r6 m; A7 ?/ r1 M  N/ ASuppose 4-6 > 1-3
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* A) A* |$ a$ jJust like the first Step
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' P/ m* O6 h. q! ?% N% `( E' c/ r% Y4 vs 5 ) h. `; n0 F  k) P5 j% j! z2 w: c' V

8 i  z. X9 T  A: {* \" T& f- cif 4=5 6 is the fake one
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if 4>5  4 is the fake one   a; B+ u# E' y6 ~* v# f4 q7 a
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and so on......................

hello1997

分3組4隻波子秤
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: e: F' i9 n0 V, L: S. UGroup A: 1,2,3,4
4 b7 w& }) R; LGroup B: 5,6,7,80 f+ B( o% |9 D6 E  R" d; ~
Group C: 9,10,11,124 w5 d+ Y  p2 x
Group D: 134 w3 F5 ]5 ^1 h* ~, L$ }

8 `. _6 _2 b' E+ N$ H8 Y0 F4 p) nRound 1
8 V, ^% e1 q2 D5 A# IGroup A vs Group B( u) p. j$ k) l5 w
如A and B一樣, 即較輕一粒在Group C or D
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' g  y# M9 q! `, hRound 2
5 w" `, d, r7 s6 R! l再在Group C拆成:& ?" v/ g$ F% O3 a3 i
Group Ca: 9,10
- m" [# B5 x# L' CGroup Cb: 11,12
; f# T" Z1 k' U& j' c然後再秤, 如一樣, 即13為較輕一粒.
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' B' f2 D6 n7 y& K& W. v如不同, 即較輕一組有一粒較輕波子在其中, 2 K- N+ T5 l. J  h/ N, k1 H
要再秤, Round 3, 之後便知答案.
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0 Q! U( g: L: q- S( xe.g. #1 假設10為較輕的一粒9 l8 e" L8 w' U1 o2 w" k3 {
Round 17 f7 o- E4 f8 ]
1,2,3,4 vs 5,6,7,8 = equal
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Round 2, L1 D& ?* w6 x
9,10 vs 11,12 = 9,10 < 11,12/ |2 R2 b% w' ^
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Round 3
4 [) T  ^( t7 a: B9 vs 10 = 9 > 10
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! L# ^/ A- c9 X) D! S0 z% h( gThe answer is 10.
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e.g. #2 假設7為較輕的一粒3 ~7 F+ v) _, B, s( q
Round 1
5 r/ q# [# K  g0 P; _1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5 Z) o  c4 g& N9 ~! G9 `Round 2
* b& }" E; l- O* H  t6 J6 X. D5,6 vs 7,8 = 5,6 > 7,88 n; y% b- P+ g6 b9 ^5 \
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Round 3/ t  G4 ^3 r, Y3 F
7 vs 8 = 7 < 8( Z, W9 v, w& G: S! _' E' r8 x

$ @, c; R+ z! v7 W/ F* s! R, wThe answer is 7.) q* M2 ]+ @- k9 s

0 p& N( o" w# }5 R! `* X3 e' @e.g. #3 假設13為較輕的一粒5 c- b! `8 _. C0 W# O: w
Round 1
/ }/ E9 w% X8 y) P- G6 y0 v1,2,3,4 vs 5,6,7,8 = equal
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Round 2" X6 B# ^! h3 [* w1 B8 J4 W
9,10 vs 11,12 = equal
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No Round 3# Z' N3 n% [( R# Z3 P9 m% _5 K$ i/ C
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The answer is 13.
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2 r! E5 B5 x6 J9 f唔知我答得正唔正確呢?! 1 {7 r. Y% F7 e5 i6 U( v

+ G, X6 H$ M# }0 Q% d4 {7 {[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:' q5 U5 ?9 M4 R. P1 u  t
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1-6 vs 7-12( g1 K, R/ X# r4 J6 U  U
if 1-6 = 7-12     13 is fake
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/ Y& V, W7 l* v5 h+ xWeight the 2 time 9 w$ a5 M3 R( C6 x
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Suppose 1-6> 7-12
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Then Weight the Third# f1 w$ k9 m3 l& j# B8 Y6 I
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 ( @2 [0 k: `! m! L! c/ Y

6 C1 E0 \. U+ d% S  \if 4=5 6 is the fake one
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9 ?  Q% j. [3 V7 o+ A+ @if 4>5  4 is the fake one
- s! G$ d/ \7 Z/ w; `! iand so on......................

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問題第二步
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Weight 1:  1-6> 7-12- s  @0 k: D7 m# ~' B
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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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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+ x5 N( V- @9 ]+ S  s9 fWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 8 B* D: K5 ], v% w9 P

0 x6 s5 ?, G& M+ ^2 W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