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7 @3 P; h) ^) \. a) F" ?
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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)。$ s+ W$ @1 `7 r: C
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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; \; J$ a5 ]! [$ j( n1 ~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6 o4 W0 s! x& ^: T0 Q" n8 e0 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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2 E' V2 b$ K2 B. o! _* w' @[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:8 C! b$ A' `0 _) y9 M
相信e條題目都有吾少人玩...

" ~" p& R  [# j我以前畫左個chart去答,
3 w( i8 g9 o& C3 A; C7 B) T等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
: s4 S: `8 U2 r* G+ u% |$ E13.........9 L; G( x! v5 `4 I
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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,
$ {. h  W5 F, D- a- 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:
5 G+ H) X6 N$ ^, O& k5 T唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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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:  ~* G7 Z$ h3 G4 t, S0 V# D
相信e條題目都有吾少人玩...

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. R8 R+ s; f5 E) V. Y7 oPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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2 Q. J9 _( q5 L, ?# x6 @- @/ S( q: PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:! y: a1 B; N) V1 n( j5 n, K: A+ L$ }' Z
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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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- G1 o* l2 G) V# `* x  ]4 H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 7-127 {: Z- i$ V' f' T3 ]. @
if 1-6 = 7-12     13 is fake2 A+ @2 w- m* L
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if not ! g1 H' q2 }( `: x5 [* z9 c; `

$ @3 I9 [. w, T( J& qWeight the 2 time
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Suppose 1-6> 7-12* I$ A, J& G' N9 V/ B5 _( {2 [9 a

5 v. t, ~! R4 D1-3 vs 4-6
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4 H/ @. V& l7 wThen Weight the Third" O' n. x" b7 C, t8 n5 d1 ~  \
3.
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% E& X- D5 q' L" p+ fSuppose 4-6 > 1-3, _7 p( K5 ^2 o1 R
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Just like the first Step/ F; c& ^: U$ @& P4 z) P; D
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4 vs 5 $ K( }- C, {& e0 e1 N( V0 f
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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3 B& _$ L3 p) j- @4 Uand so on......................

hello1997

分3組4隻波子秤4 z9 J% H/ g* N1 i

. M2 ]7 @& y. u5 m' Y# f7 qGroup A: 1,2,3,44 ~6 S6 l3 H! U, x& X
Group B: 5,6,7,8
1 l) E& w2 f# H& G" w2 UGroup C: 9,10,11,12* X7 P0 [0 a' ^- \# d; r- M* K: D
Group D: 13
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, |+ Z9 V) S4 n$ NRound 13 `. g; A& I- `' p9 |! a; r- e9 A4 r
Group A vs Group B3 j  M) L$ E( u2 D: t0 C% I
如A and B一樣, 即較輕一粒在Group C or D
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7 L5 ]- M+ l+ c2 j& T$ U4 t) X) Y" @Round 2
! D, q: m9 G7 ?6 ]$ W1 O再在Group C拆成:
" z; u8 `) t% I4 TGroup Ca: 9,10$ P% J- T2 m% g
Group Cb: 11,12
" l: g7 D" y- V( w然後再秤, 如一樣, 即13為較輕一粒.. v$ `) k7 w, D9 a% B" l

- C9 G$ t1 g0 n1 ?如不同, 即較輕一組有一粒較輕波子在其中,
1 V( Y( N5 g* r1 W9 z8 M要再秤, Round 3, 之後便知答案.
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. s; w# E9 Q" _7 fe.g. #1 假設10為較輕的一粒
. ]& B% L3 |- ?0 d  I; I) |Round 1  q) D" X8 H) ^9 D# Z$ D. f
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
  y& }* v7 G) g( |( `9,10 vs 11,12 = 9,10 < 11,12% E& R4 l* {% M1 S& z
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Round 3
2 k! _3 L, O3 v7 A/ h, B0 T, V9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
0 `1 _# i& O+ g# xRound 1  b) k3 ?2 Z9 {! d% b, y2 R
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, Y) S8 U/ p( ~3 n2 Y1 H/ l) c! s

; L" j- t. |3 Z+ dRound 2: M; D7 B' f0 A4 M
5,6 vs 7,8 = 5,6 > 7,83 |8 _1 W$ E  v  z: r) m8 I

" R8 R% x/ d; }+ j0 @8 g& _Round 36 e2 p3 C, ]  M4 Y) ^" ]# f5 G
7 vs 8 = 7 < 8- d) z+ r( G% U- G6 y. I

9 U6 v* @7 A& f* g5 b( A9 uThe answer is 7.( t( ?. s3 {8 l9 ~

9 ^, x- G* ~) J& [e.g. #3 假設13為較輕的一粒8 g# w4 p4 W3 R6 ]& o
Round 1
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Round 21 O9 ]! r- Y5 [" N8 q- u
9,10 vs 11,12 = equal
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* a- }* Z$ m3 k. YNo Round 3
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: U# `5 [/ }( H* r9 c/ X$ eThe answer is 13.
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唔知我答得正唔正確呢?! 2 {" C2 N9 g+ e/ d, R6 e
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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
: B4 V/ F2 E7 N4 e  dif 1-6 = 7-12     13 is fake
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if not
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( l. V9 v, f0 P; k  b4 z1 xWeight the 2 time
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Suppose 1-6> 7-129 S! c7 I' [# t

5 D0 K0 [" ^- W! L3 L# y1-3 vs 4-6
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- b1 J0 V3 @* d+ hThen Weight the Third
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3 p2 ^' d# K* Z1 K- _' Z+ _# ?& QSuppose 4-6 > 1-36 M% B# r- Y/ u2 l( ]

; ]2 K3 p* t1 W  K4 PJust like the first Step. _6 m. H+ E/ `6 S

1 d5 Z' R1 N$ J8 m; f: p4 vs 5 1 N0 I3 j4 b$ k

/ U. l. i$ \  Pif 4=5 6 is the fake one ! U/ p% D* R1 d+ S. }4 b

$ \* e" S# E) @9 c- t6 B7 Yif 4>5  4 is the fake one
" f) N6 h0 {* J' C" T5 U' G; g+ Tand so on......................

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問題第二步
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Weight 1:  1-6> 7-12/ x2 d1 C& `2 V0 Q

& s/ l4 K5 l: j, OWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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. y* C3 M) q9 \8 ~" x( D4 s6 U你第三步点去搵 7-12 边一粒???
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問題第三步; g, L; O6 l9 e6 y- G8 i7 }
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Weight 1:  1-6> 7-12( n: w% o+ F0 o+ Z
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Weight 2:  4-6 > 1-3 " j0 L" M% l& s6 M, P! v5 A$ ^; F
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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