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+ y  ^8 J' J+ n6 X: I6 E1 }1 \
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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)。# _3 c+ T! v: Y
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？』  {5 \# e+ E3 K# y6 H! S8 k
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注意:
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9 X! T8 Y- {6 W4 \: }1 i, R# e5 p, l1. 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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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 21:34:4 q5 a3 i6 a5 F$ v+ o' m
相信e條題目都有吾少人玩...

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我以前畫左個chart去答,$ l9 D  w) h5 k* J
等我搵下仲在吾在
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' i. }; A  T" [% h! s& [* B當日用左37分鐘答１２粒波子，差７分鐘才合格。% t0 |% v6 S, U, H% P5 T
13.........
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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:  n& [* C/ `) ~- D* I' g8 @- {* S

# C3 Q6 L+ t' t$ ?$ G; U% \4 B我以前畫左個chart去答,+ r- F) M$ M$ B! V
等我搵下...

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) b8 l4 |0 n2 l$ L0 T0 d/ W- P; j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:
6 N. W# h. `2 R/ h9 m. \唔識隱藏...已經諗到..

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  G) j! B  a9 J2 W3 {, u. Isor !!!....e加改左
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: }: {4 ?9 }1 O& ~- _. {7 r' o2 ]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' x# k9 R4 c1 q2 ~5 T+ {1 i9 P! s
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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:6 l. x9 S% W" l& {7 r4 h& l; W" z6 f
相信e條題目都有吾少人玩...

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! H# B! f7 B1 EPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 T' z) Q) G4 \5 ^
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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.
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Thanks

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, B  p+ L6 \6 ^1 W9 @不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
+ a7 s) i# i  m$ o" ~% N1-6 vs 7-12
7 B" \* j% {; i( `# ^- v' Xif 1-6 = 7-12     13 is fake
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if not
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0 _9 F" k) l5 h# l' x  G* [Weight the 2 time : j" m7 ~) t5 {4 c& E- g& i- l
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third) _0 y9 W6 o: {3 d( F: o( @
3.
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Suppose 4-6 > 1-3+ N3 d. p, G9 F0 L

1 k. _) x% B) ^- z# NJust like the first Step/ ^& d- z! u1 a) \. v% n  D# U

0 O- ~, E& P- l9 n  V0 ]* ~- [4 vs 5
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if 4=5 6 is the fake one , T4 r# W% v& {9 U- J* {0 e5 b6 W

% f; t) Z) `0 R4 `' k3 H) J2 Nif 4>5  4 is the fake one
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4 {% u! k, o& [. D+ s9 Xand so on......................

hello1997

分3組4隻波子秤
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. H% n" {4 s7 T( V$ mGroup A: 1,2,3,4
9 C1 r6 G5 b. k1 aGroup B: 5,6,7,81 ~  r: h8 _( n. g: g. w
Group C: 9,10,11,12
) N; t# V" o* r$ JGroup D: 13! W4 m$ _9 p! h- W3 E
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Round 1; _" U- f/ U$ I
Group A vs Group B) c* m: u, }3 x
如A and B一樣, 即較輕一粒在Group C or D$ C) J$ z9 q; {  k0 J# i" z4 H

( Q; `# o/ x- j% q/ tRound 2) y1 Q/ e: N* T
再在Group C拆成:0 r# F$ q3 [2 j! v! f  e
Group Ca: 9,10# `% x. L6 q7 r
Group Cb: 11,12% V; m, T0 U7 N9 F# j
然後再秤, 如一樣, 即13為較輕一粒.
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( M, b& E: n2 p( P如不同, 即較輕一組有一粒較輕波子在其中,
/ d/ J2 h, D3 ^) P要再秤, Round 3, 之後便知答案.. h; S% h" S: o: T) k- h  H
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e.g. #1 假設10為較輕的一粒) q. E* s$ a! m* V
Round 1: K% ?3 L. v; ]* y( A) d
1,2,3,4 vs 5,6,7,8 = equal2 q6 D0 O' ~) c7 i# d" }% \
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Round 2" G. z' d. n1 ~. Q) R6 F% W! k
9,10 vs 11,12 = 9,10 < 11,12; Z# K1 C, w: ~2 d, ^

1 w# J5 e4 w* O# _2 sRound 3
/ [; C# v4 _" n% ~9 j2 f9 vs 10 = 9 > 10! S/ \7 Y* A9 n3 V

6 j9 S3 [5 c: E7 d- LThe answer is 10.
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e.g. #2 假設7為較輕的一粒# A* \$ ]2 Y: R
Round 16 l. e* N0 s1 w& ]: m6 M$ B. U
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8- U$ t- p: ~0 U5 N+ l$ I- J' R

4 P0 X/ p$ ]+ M/ i) m( RRound 26 t9 q& a  b. b5 P
5,6 vs 7,8 = 5,6 > 7,83 G" d* n2 T! j! d4 M
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Round 3- V5 N+ i" Q3 y& u/ K' q6 Z$ }
7 vs 8 = 7 < 8
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( c( F$ q! v  {! Z% }6 v# NThe answer is 7.
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e.g. #3 假設13為較輕的一粒9 ?- X6 c0 G& ?- X5 A2 m5 B
Round 12 D2 L, c5 z. h  m: k
1,2,3,4 vs 5,6,7,8 = equal; D2 _6 |+ o! a9 S; ]5 w$ X5 L5 h8 K
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Round 25 [& E) @( W0 R) c
9,10 vs 11,12 = equal' P& }% ~. S: N; S( Z( }

5 @& F. J8 N% i/ h  t  y) k( P- HNo Round 38 I3 _( C8 ?" c% y+ Q% N
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The answer is 13.
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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* [. e% Y3 c6 v# G# B" P8 J5 H! L* m
if 1-6 = 7-12     13 is fake0 t; F( q! i) N# I. x, Y% h( p% B! j& d

* p! f0 e7 x# m2 R% F0 R' m) tif not
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Weight the 2 time 6 p5 G; b) [6 h3 M8 d: F

/ U& a0 [' G7 h  }! cSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third6 n$ E! N1 J% k- R' z. S2 @
3.
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+ @7 O# _. g* g! k! R; \1 JSuppose 4-6 > 1-3
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Just like the first Step2 S1 X& @; O/ ~: w# T$ ]3 r4 X* `% {

9 S8 p0 e- v, y7 z" j$ I4 vs 5 4 l! ~7 s' s8 U6 H9 c* Q4 ]; s
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if 4=5 6 is the fake one 7 y# [7 P& f: E( }, m9 _# w7 l
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if 4>5  4 is the fake one
$ ]& F- D# S: ~! W" i; Oand so on......................

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* b$ u+ g, ]* o" I* S& y# v問題第二步
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; m" y: j! a( R% hWeight 1:  1-6> 7-12
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7 r2 ]7 L3 X7 U$ NWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& \3 X7 [$ U' l1 v% M0 V6 G

; B! D6 c1 p8 h& x你第三步点去搵 7-12 边一粒???+ s# t: h$ F! W* l+ |0 U/ e

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問題第三步
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Weight 1:  1-6> 7-12
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% Y( Z/ j  H: f  fWeight 2:  4-6 > 1-3 # Y0 X4 M/ P  [
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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