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% u9 k: i8 e3 T% M2 V* Z
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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)。* f& t" `, a  C4 A4 \. s
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？』% v, S% B  x5 M. P! W7 Z$ [

' @. N) M5 x: g0 Z5 E; W注意: / S0 f0 q$ C$ V* A! m3 x2 [; _2 E
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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  \* u, A8 q$ h$ I
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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) Y1 H, T* a, D. A
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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:/ P3 L9 v5 Z( y6 Y% j7 G0 A
相信e條題目都有吾少人玩...

0 _- `. n# z& g1 f我以前畫左個chart去答,; K9 z  d" j+ J" p4 p
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。# l; o* g4 \0 M: x# ?
13.........
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( R) R2 M- |+ R, \0 ?[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:0 I: g5 h! R2 U
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我以前畫左個chart去答,: n2 y3 ^6 h" q6 ^; ?
等我搵下...

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! k; F/ d4 A2 \  g- f+ I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:
  d: Y  ~, h) S. _0 C# h) Q! h8 m唔識隱藏...已經諗到..

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9 F2 @  t9 q# P3 l/ e# Esor !!!....e加改左
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2 C! b+ R( q4 u" h) B8 H2. 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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$ I  F$ G# `3 N* k% u[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
; N) j9 _/ m8 d& ^! }6 P$ K相信e條題目都有吾少人玩...

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/ u6 m* ^2 g$ o6 ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.8 F- [. [2 r; L3 q- H8 U

# W- m. e' [( M7 Z0 d  uThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:2 ^. u! o% m3 f0 a; @

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! q4 _1 B; o9 D6 O+ S, NPlayPlay, Let me know later who has the right answer and I will add points accordingly.: X2 B9 `9 P) T- _# Z) s
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Thanks

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* M& A+ a! B% H2 T, E$ L6 b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 7-12$ t! U* v& v( F+ I& T
if 1-6 = 7-12     13 is fake* x" ?8 ~! z8 o' v. b: J" K

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; h3 a) |- m: V3 ?# KWeight the 2 time
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" v. i  B6 x% t/ W) FSuppose 1-6> 7-12! I, Q$ R! A; m5 M9 m

- V, D* s) E/ Z, C7 |6 I1-3 vs 4-6
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Then Weight the Third- n5 P. p) @9 v
3.
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' h! u; @3 R1 LSuppose 4-6 > 1-3; D) k. a6 n: W2 a# x" a; H* O

8 D' I  T% J; x' UJust like the first Step
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4 vs 5
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8 P% n7 c% N* v. m: k$ ?& ~if 4=5 6 is the fake one & H% A' E0 X% F8 w; a8 L" ]

, X" Z  g& v* j0 j; u' y+ Vif 4>5  4 is the fake one
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8 v+ T4 e6 [0 u3 N: @  u5 Band so on......................

hello1997

分3組4隻波子秤
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7 e, J3 T4 V2 g4 t# u4 v/ JGroup A: 1,2,3,4
$ o# S* r7 G/ O( s3 g2 I: s- _Group B: 5,6,7,81 i* K5 j  d5 k3 ]/ A
Group C: 9,10,11,121 @7 Y8 J/ e; Z  S. }
Group D: 13
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/ _7 R! v/ T& i. M% @$ @5 v: IRound 1
0 i( ?# x  S) }! S+ FGroup A vs Group B8 e3 K8 w" ^: M+ ]" [
如A and B一樣, 即較輕一粒在Group C or D
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' n3 `6 F1 i6 n) t- ARound 2
+ k8 ~! Q: N8 V再在Group C拆成:
0 H/ Z1 }7 z' AGroup Ca: 9,10
0 S  {# s& K# a. O! [3 nGroup Cb: 11,12
& s" [  L# x' a% s: I然後再秤, 如一樣, 即13為較輕一粒.3 F% a6 Z& {/ C' M

. b  c0 {3 f) B0 s如不同, 即較輕一組有一粒較輕波子在其中,
6 Q+ M+ t7 k- ]1 U# H5 w. [要再秤, Round 3, 之後便知答案.9 m- D0 V2 z" l! p+ e5 N; r9 n
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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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  `0 H& \. h, [0 {$ w3 x7 J' o4 xRound 2
& G: P1 \! t3 e# `9,10 vs 11,12 = 9,10 < 11,12
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Round 3
; [. e+ X( M' J. T6 y9 vs 10 = 9 > 10
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( {! n; h$ @9 e2 G/ D, W: nThe answer is 10.4 E3 X. ^0 ]# l

! o1 ^* D( W# j  {" b) f% I9 ye.g. #2 假設7為較輕的一粒( [. m; L( d% W: ~2 i9 G
Round 1
: j1 \  f: a+ i1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,86 O* S% l2 y+ U, p' j; ?5 \

- l$ ~! \7 `5 x6 MRound 2
. N$ V3 S! [. W' g. p; C: K* J5,6 vs 7,8 = 5,6 > 7,84 Z8 D% }$ K. [& E

8 x8 i( J. {  cRound 3$ Z7 G# [& z+ f
7 vs 8 = 7 < 8( b" P4 E) d) r2 V% L8 o! B3 o
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The answer is 7.: ]1 K, Z6 y+ c& ~+ g/ T) Z+ D: @/ p
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e.g. #3 假設13為較輕的一粒1 B8 o9 J, s/ ]
Round 1+ v3 X% R0 S/ c% d: P% V9 `
1,2,3,4 vs 5,6,7,8 = equal
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6 ~* Z& z1 m0 m' Q' D+ VRound 2  w: e; F, N; J2 B8 s" N2 h
9,10 vs 11,12 = equal
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No Round 39 ?3 A" v& S& a; I' X7 }
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The answer is 13.! f; ^0 I& L% X% K
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唔知我答得正唔正確呢?! / [" V3 O5 l1 E/ k
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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:( `  `6 Q+ o8 @. ?; ^; k
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1-6 vs 7-129 Q; ^% h, f- D) O* K
if 1-6 = 7-12     13 is fake6 L( g# h& G5 s. r. o# x3 W
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if not
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Weight the 2 time / p% V% k/ {3 z& [
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Suppose 1-6> 7-12- I: I0 B! G# n+ l( I

+ y- \8 v3 C5 Z. M4 G1-3 vs 4-6 1 V% w" i; |& M  |6 x6 a

8 ^$ w2 n" R! `7 I9 W' E' fThen Weight the Third
3 I" k" Y) e# j+ y3.: O& {- d4 r4 U" Y1 p5 Q

( B: X% H2 l/ d$ i0 TSuppose 4-6 > 1-3) P. {; m% G+ U: i/ N8 r$ m
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Just like the first Step
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4 vs 5
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/ r8 R- U8 p9 g. w6 r8 Dif 4=5 6 is the fake one
/ S# e7 f% C2 ]: n! b* u& c
" K" h' A+ T, c$ Qif 4>5  4 is the fake one
$ Y* L+ G! `  p) k  ?# Rand so on......................

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問題第二步- q7 v- C& _! X" p
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Weight 1:  1-6> 7-129 D( n( p% c8 s! s

! s4 B( ^3 n" r6 F% LWeight 2:  1-3 vs 4-6 , if 1-3 = 4-61 Y  e, c1 M# u

( _# \* E  {" m你第三步点去搵 7-12 边一粒???0 V( A9 X  h; @" Q* ]/ d

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問題第三步
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+ z+ U0 m- u- J; e& c# x" I% DWeight 1:  1-6> 7-12  a2 |: E( V7 N/ \$ Q
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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