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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* @! U5 Q- Y, ~4 V9 z2 e# h『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)。$ U8 \8 L4 E! K7 @) 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？』
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注意:
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" f# ?' L1 \& a& ~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' F) {: ~: j7 n( M+ T: y
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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
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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:* A" p, S8 ^1 c! K6 f
相信e條題目都有吾少人玩...

' v) M5 @, n8 u, J5 F* N# [+ H我以前畫左個chart去答,
0 h0 ?+ b2 c( ^* }8 S1 |8 i等我搵下仲在吾在, \, m( R& \4 a. g* Y) ?. v

; N3 A2 Q9 Z4 W* Z當日用左37分鐘答１２粒波子，差７分鐘才合格。
2 S/ w" ?) ^; u7 Y6 g+ l9 n13.........5 Z% u8 L, j8 x& L" F% ~1 T
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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,( [* |) d1 H3 U0 v  m% ]% U
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:& h. r; D: a  E% z( \+ K
唔識隱藏...已經諗到..

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sor !!!....e加改左' O4 L& i  i; U

8 [. v7 G- x( k' d2. 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:$ v% K1 V3 r- y" ]
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.& l$ s+ X  x- @; U$ Q8 H7 t

7 D5 M1 [  e0 F4 w4 Q; wThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ b) U) W. Y0 X# x: l

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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

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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

1.
" i5 j  U& L0 t+ z* _- ^1-6 vs 7-12
+ J8 B4 [& R3 mif 1-6 = 7-12     13 is fake
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# _5 E0 E: g& x  n. [. t( l5 ~$ \Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 ; C* l, b( n# m! C, z& Y( A' q

/ _: a# ?0 E, c7 eThen Weight the Third
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+ L0 p# e8 `, q5 M8 n0 OSuppose 4-6 > 1-3: `: ?4 l, n% \, z, y

' r1 a) ~% E& ^( j3 X  @Just like the first Step0 j& u2 O' ]* G9 c& F( s/ Z  m

' v% S6 \' w! D9 ]3 e4 vs 5 + {4 v# r& c4 R9 @2 m& @7 m% Y
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one * J0 a5 X% e: E  l% B
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and so on......................

hello1997

分3組4隻波子秤; H+ Q4 S0 Q$ ^" R, }

& w  K' [' b7 A- v. t% ?8 IGroup A: 1,2,3,4
3 Z% r- h6 e: b/ o  }( R* jGroup B: 5,6,7,8' g/ {# Q. m- d$ R% O
Group C: 9,10,11,12
) b& k6 ]* N& [! xGroup D: 13
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7 v" t8 V6 V$ O; N; d0 g0 n. o- iRound 1
# L# i! q( F. b4 W% m' D1 z& G" p# N2 ?Group A vs Group B0 w& i# Q* @. f& Z( N# k* }
如A and B一樣, 即較輕一粒在Group C or D
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Round 2/ z% ]9 Q8 t! V2 k
再在Group C拆成:
$ F2 H/ g5 s( T' `- `Group Ca: 9,10
0 G' v! C8 A" w/ l2 G0 NGroup Cb: 11,12* E2 S5 T* d. U% P1 i
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,
( h! n  }1 d4 {) J5 u9 h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
! i+ U: x4 ^# S9 e$ a' C9 v5 M1 eRound 1
8 v, J) Z* |, j2 A" o* i1 E3 ^1,2,3,4 vs 5,6,7,8 = equal0 J) D9 @, D- w6 f4 Z) o0 _) W
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Round 2( q, Q1 Z% _( ?% P
9,10 vs 11,12 = 9,10 < 11,12
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Round 3  m, U" b2 i! y  K
9 vs 10 = 9 > 10, j: _" p% M' t. X8 \, r9 x
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The answer is 10.# d- z* D  e# ?7 H6 A& W* e& |9 ?
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e.g. #2 假設7為較輕的一粒
" z- B- L; O2 n9 k1 lRound 1, ]1 z1 v0 F2 Q4 s% G
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 25 r+ R' X  M0 F6 t# r+ ]
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
: }4 S: c+ p. U$ K+ S7 vs 8 = 7 < 8
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The answer is 7.7 q4 G+ u  Z1 n( H2 S

( L$ T6 q1 n5 A+ n, K: ~$ I4 a. J6 t1 Ke.g. #3 假設13為較輕的一粒% N6 K3 X0 C1 E1 D& e
Round 1# W  C; R" {5 r9 |, a0 C3 r
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
2 Y% k) `# t7 l5 `9,10 vs 11,12 = equal
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8 |% J1 @1 h- cNo Round 3
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The answer is 13.( {, F) j' M# e3 w. E

4 w  v" P' }! l1 n4 T$ P) B% c1 E# J唔知我答得正唔正確呢?!
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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:
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1-6 vs 7-12
! D% I- r- k# X" n2 n" G) a8 Wif 1-6 = 7-12     13 is fake: l* e" D6 g* Y  q8 M0 L1 C6 a1 ]
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if not
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Weight the 2 time
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4 v5 ^$ M, f) {8 X1 _Suppose 1-6> 7-12' H* {: T2 q/ @7 N# ?
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1-3 vs 4-6 - a( U2 R" Z8 ~; N( {/ j1 M; Y/ V& y
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Then Weight the Third8 r) y% `+ W4 _2 E2 y, A
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1 W3 x2 u: k3 y/ ~/ ZSuppose 4-6 > 1-3
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% ^4 r6 B& E  p) o8 D$ i) v+ `- aJust like the first Step
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& O! ^4 `2 c0 B; f8 H$ A4 vs 5 / A/ l0 j2 }8 T9 }! y% b

, V' U; g- I0 k* o4 S4 e1 U9 cif 4=5 6 is the fake one 6 _6 C5 B2 ]: v

  n1 \2 A5 l4 }( z+ ?: i# z5 Q6 b) vif 4>5  4 is the fake one
. T' g: y7 P  d, i' g% Hand so on......................

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5 q1 u5 s7 A7 [* h- a& |6 U問題第二步9 Q  e1 ?4 b) h: r

. J4 ?. t; ]( c% Y7 i: BWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-68 f; N1 A2 F! E( t0 ]+ r
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你第三步点去搵 7-12 边一粒???7 Q1 D3 I0 j; q$ q  T
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========================================
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問題第三步
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  S: P  ^) |! K# O* W6 sWeight 1:  1-6> 7-12
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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