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+ i* [; F) H3 S5 P5 r2 U
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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)。" D, t9 s5 C- j9 H& F3 i* V
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: . k, u) o& e  c7 _3 O
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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
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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! u* z! t! d+ D% Z3 j4 ^
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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:
% b+ J4 S. ^- K/ \2 f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,
# ~% E: D8 ]0 c8 S: B( ~- U2 d等我搵下仲在吾在1 k: r; g& {2 O1 ^1 |4 H

) [% Z" E8 Q$ s7 E6 J- X4 t/ s( a/ f當日用左37分鐘答１２粒波子，差７分鐘才合格。/ {8 N( B: s& e
13.........
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+ `: {% I1 K. z4 ?! x" k: F$ d2 U7 K[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:7 R0 L+ p5 ]6 l  n

$ m) `5 h) o. m+ O) h我以前畫左個chart去答,$ ]: [7 W& U# T& q
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:4 S$ }) q: x. @8 Q4 w3 b  v+ u: ~
唔識隱藏...已經諗到..

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& d( c9 w  ]) N  ssor !!!....e加改左! ?' x# m- k  V8 ]
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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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9 M. a6 l4 D/ V5 i! I: Z) m+ O2 K) Q[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ }# u1 p5 H+ f! q/ X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.
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! v" |4 @/ C0 L: J, sThanks

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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- k) ]0 v- ~' T7 {) f7 F7 t不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
. N1 ]8 u- _3 |* u1-6 vs 7-128 `6 D& S) {. Y8 ]6 v
if 1-6 = 7-12     13 is fake
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% Q1 ~3 {: x" x- v4 [if not
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* S+ |5 J& y  L6 {+ ^6 rWeight the 2 time # j- h. u$ y' l, I

7 Q' P4 }' Z( a3 f- S/ bSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third! [( M4 K2 |( X& r+ S
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Suppose 4-6 > 1-3) `: s$ F* |/ E9 o& o
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Just like the first Step. z2 Q8 d; T" B) F: `6 `
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4 vs 5 6 C3 N+ i. w5 L# a: H- P4 d

$ \3 y! h$ D- r; ?2 bif 4=5 6 is the fake one : w. M1 J$ b* Y/ E  ~' F, B0 u

7 U* w1 |- u0 P* [+ M# _: l' I/ O/ sif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤7 d: u3 w4 |, M- g* M
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Group A: 1,2,3,4
" d2 u5 M) s9 S  {- pGroup B: 5,6,7,8* f% s& y; I1 Y6 F' {
Group C: 9,10,11,12
5 {, B5 b* S3 `) n  _3 LGroup D: 136 z% n! ~# p9 }: y& r; P* ?
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Round 1
7 D- c. o* ~- i) X1 zGroup A vs Group B
& J+ s" R7 `8 }/ C; J' `) i6 t如A and B一樣, 即較輕一粒在Group C or D* s6 X4 n: I: a! F- R! U
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Round 24 }" g% l- \1 a/ H- ]# [" @: s
再在Group C拆成:
- Z% F3 ]" _2 }2 S3 G4 W1 n% xGroup Ca: 9,10: k/ o1 U7 r. y0 z' u5 _
Group Cb: 11,12
2 b, k0 |, D6 i然後再秤, 如一樣, 即13為較輕一粒.
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7 K' M& E! X. d4 [如不同, 即較輕一組有一粒較輕波子在其中,
9 I& @8 z. U9 O  I# @) w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. b/ v/ @% B% w' L) z0 q
Round 1
0 j3 t$ F  a7 A+ v) w  t: j! ~1,2,3,4 vs 5,6,7,8 = equal$ C& G% C3 D) A0 f# u; }! z
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Round 2
3 Z' W; S8 N% \7 w  g- q9,10 vs 11,12 = 9,10 < 11,12
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% K4 Y) m0 z7 D, [Round 3
% y0 H4 z- b/ T' S, m2 Z2 _- Y9 vs 10 = 9 > 10  ~1 o7 V8 W: g" t( N
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The answer is 10.) L( A/ }: m  R# l5 V5 x' }

5 u/ _) J" j7 `1 X! f$ i$ W( d' he.g. #2 假設7為較輕的一粒
% o7 b6 B6 p, fRound 1
8 K4 }# k! m4 g# b+ u1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# _: C$ J( k, P- P* \1 e# ]
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Round 2
  Z3 A4 `, W& S' H" S5,6 vs 7,8 = 5,6 > 7,89 S$ M% M1 [  H5 p0 U
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Round 3
. c% s3 g8 Z4 A8 U) g7 vs 8 = 7 < 8# {1 H9 ?3 m  Y; y& O

% Z4 ?/ K( Y) t' zThe answer is 7.; ]: s, A2 G. E4 P2 \

+ |% T" b, S, q8 E5 Y# z* ?! b& Ee.g. #3 假設13為較輕的一粒' c' X6 G/ {3 M5 \
Round 1  c+ `+ C: j7 G9 c) @  f' ^
1,2,3,4 vs 5,6,7,8 = equal
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5 \: j# ]/ P' @9 v" a% Y  {Round 2' j9 T4 d# p6 G
9,10 vs 11,12 = equal; \- }4 }5 ]+ p5 D6 s' [

+ `2 }0 f  @3 u7 ^3 b* O' YNo Round 3+ m: X: N. t& r/ v$ N- {
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The answer is 13.
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3 q' a6 u- h# \, R, @) v唔知我答得正唔正確呢?! ( v. @. e1 k9 M) ^9 M: _' ~
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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:* r/ ^. u8 I+ L$ m# C5 ?
1.
/ M; H$ H; Q% D2 x2 a1-6 vs 7-12
; v0 Z' {3 |. W1 ~* G2 `) }1 {# dif 1-6 = 7-12     13 is fake
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if not
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! e0 Q1 H8 N  H  ?Weight the 2 time
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Suppose 1-6> 7-12
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: V; p9 |0 ?) o' _1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3/ [7 H9 |8 B4 t
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Just like the first Step
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! B7 I/ [: L; {. _% A7 X4 vs 5 ! f3 K7 q3 C& _4 ?$ F: \6 N

7 j1 L  W: q1 r. q% B3 bif 4=5 6 is the fake one ' C( k% e/ \1 o
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if 4>5  4 is the fake one * Q2 u, S- G& n% A' \8 _/ t
and so on......................

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- S9 Q2 I4 z% j6 d: h/ n7 m' g問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: R* S- K9 j4 g& X. j

/ m; X6 \+ @, z! L$ u你第三步点去搵 7-12 边一粒???
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========================================" ]* x3 Q$ \; b! o' M& F4 C. s2 e

9 k) N0 ?- K# m- H問題第三步% f: p3 y! ]( w  U# |

9 X0 P* I! o+ `' N. b& ~! O8 j/ QWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 . k9 L6 b% G& \3 ]

; L, i7 r: K5 U9 V; o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