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, O) U( V8 k8 I

! y& I7 `" F6 ^. k, N( q8 D5 W* V『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)。. c2 S* V# s# b( _
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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+ T: g9 T1 S$ D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1 J, v- t& |" G8 J/ N
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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, X: d" [% H2 e' o' Z
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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:
3 v2 Y, B2 z3 Q1 Z) ]2 \相信e條題目都有吾少人玩...

" t: g: T+ H9 b7 D, y% z% a* }我以前畫左個chart去答,3 t, S/ ~1 d$ Y2 H7 Q: O
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。8 v# z( E! s& I% ^1 X5 B% R
13.........
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  {$ U5 Q6 N9 Q- V% z$ b1 }[ 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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1 R" s) \5 ?, o: Q. a我以前畫左個chart去答,$ [7 E5 V9 S0 m
等我搵下...

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% I; Z* I" E+ F$ E0 ?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:, a3 r1 D' L7 ]) d
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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  v8 x6 V& V# {& ?$ b- ][ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' N9 X; o5 H! p) @2 y
相信e條題目都有吾少人玩...

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0 I/ @. B5 B; _; J, pPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 e9 |5 F4 F" p$ t; R
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:7 }, y/ H. _9 X$ A1 A
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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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% m& o  V/ j4 G+ y& w9 P不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
  i0 d! n  a1 g' Q0 ?1-6 vs 7-12
6 j$ J- }3 x0 |6 I% ?% Nif 1-6 = 7-12     13 is fake
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if not , W0 b5 ]9 F% U2 n8 t/ I

! J6 h$ {/ J$ n/ w8 ^Weight the 2 time 0 w& k# a2 y/ W& H- Y: K
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Suppose 1-6> 7-12
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/ G8 R. q3 N3 X) f/ \0 u6 g1-3 vs 4-6
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$ f: x0 l) B% uThen Weight the Third* p9 R+ B' ]% S* ?
3.
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9 c4 H" ]  ^6 T, nSuppose 4-6 > 1-3$ j; Z9 l4 d; C8 D3 v

8 G9 W- N% H) X1 n, T/ d* {Just like the first Step; x8 T" T: F6 T# G1 m
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4 vs 5 % M9 e: f) F6 J: P# O" {
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if 4=5 6 is the fake one
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  H" \! u: E! n5 dif 4>5  4 is the fake one ! I5 C& D3 A' j
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and so on......................

hello1997

分3組4隻波子秤6 i; \8 f% e& Q: c1 a4 v& y
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Group A: 1,2,3,4% h- S# R0 b5 F5 H; n8 ~
Group B: 5,6,7,8# v% g" {" n3 {: i
Group C: 9,10,11,12" M  Y: T' Z; R- e
Group D: 13
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Round 12 J6 A! |$ d( N: s  p
Group A vs Group B0 v1 c6 t6 P& N* @/ ]
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
# W( q% `6 f$ c8 j; g, L( B再在Group C拆成:/ h: f4 B9 t" ]2 z. D" [
Group Ca: 9,10
7 J4 \7 l; R% L$ y+ L8 X+ nGroup Cb: 11,12
) w  v' a+ J$ c8 x2 Z  G) Y然後再秤, 如一樣, 即13為較輕一粒.5 d$ I3 q3 B+ [0 F% D3 B, u' }! ^

; Y9 B% S$ r+ D' t# ]  u如不同, 即較輕一組有一粒較輕波子在其中, / }( P9 w+ x3 x& p
要再秤, Round 3, 之後便知答案.* O5 l; i/ i6 M$ c
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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
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Round 2" |0 i8 k: ~: I3 t/ w* C
9,10 vs 11,12 = 9,10 < 11,12/ l% u$ a0 I# f$ K% X
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Round 31 z  [0 e+ \( }, Y8 o' L& `" X( o
9 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3 D; m  [3 b! I1 i9 u
Round 1& L9 N. \. E, ?/ K4 B9 g, _% e5 `( v4 L
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2$ S" V# k* k) t
5,6 vs 7,8 = 5,6 > 7,8
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Round 3* L7 b! N& k6 t
7 vs 8 = 7 < 83 A& z% {5 l$ _! M. Y

) e/ e& [, X+ |7 RThe answer is 7.
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1 M6 N' j7 _2 F; re.g. #3 假設13為較輕的一粒0 L% r9 P+ ~: {" F  N; t5 p" a
Round 1, S+ U0 ^( Q/ B
1,2,3,4 vs 5,6,7,8 = equal
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Round 2& E. H6 G6 L* s+ ]1 j4 P# \
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.7 L- O1 i$ Y/ {
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唔知我答得正唔正確呢?! 9 G/ u# [. d; w  ^- G  W% x
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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
0 N9 f! `( i) Iif 1-6 = 7-12     13 is fake2 W) O; j( S- `' w. q& N5 A
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if not
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; m: d5 x3 `; {4 }Weight the 2 time
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Suppose 1-6> 7-12  K1 S* ?" n5 t+ H) b* ^6 A3 \
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3% a5 z, J6 y, Z9 _3 d

6 T+ ]( n6 b" h9 d: E& v) w9 tJust like the first Step  i* l. k) e+ n
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4 vs 5 + @# A5 J( @) @6 Z7 h

2 K$ t! j. J: R/ x5 eif 4=5 6 is the fake one 6 i5 Q1 E8 X" p' ]  v5 [

+ ]1 Z; ?2 F+ Y9 t4 bif 4>5  4 is the fake one
; ~" J+ U' h6 v, ?and so on......................

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問題第二步
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9 R7 |3 D3 W* D- @% `/ GWeight 1:  1-6> 7-12
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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???$ M9 |5 q( U2 z/ {' Y+ P' H, O2 h
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- N- I6 E! b# _" n% s2 K  N1 b- ~問題第三步
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2 i0 L2 l7 Z! W% N- G& sWeight 1:  1-6> 7-12" N1 n1 x8 F" j- }: R' }. ]
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Weight 2:  4-6 > 1-3 , F+ K! v2 w2 c2 r
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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