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4 \0 W7 {+ j( `! _7 K
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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)。
/ c, u, s8 {; _: e- C; c7 G+ o% r4 L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？』/ q+ [- ^+ g" I4 \0 ^
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注意: ( z8 t! N0 j! R3 K

+ I/ s% _! r9 e' ?4 B1. 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' L% @1 j( Z/ C& q0 r: s
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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:/ J+ x3 V7 T7 K' y: \; l9 k
相信e條題目都有吾少人玩...

5 w! x. C3 X/ b1 |- R我以前畫左個chart去答,2 d7 _& e" h, N+ O1 x
等我搵下仲在吾在
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* N/ ]8 U7 D( S, J6 F0 \當日用左37分鐘答１２粒波子，差７分鐘才合格。' c% i0 w# B8 Q7 E+ v# \1 X
13.........
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- e, U; d" l" @& `' }8 D2 v[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% D: E& {9 O# \& d, X# d

! b/ ^& u4 J# n$ `6 l" C) _我以前畫左個chart去答,
& u* b6 D- ]: P7 T! e等我搵下...

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' R7 S2 p9 w- b# C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:
; R6 ^& u8 l) O+ ?- m" `' ?唔識隱藏...已經諗到..

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# D& `) u  T% R7 W# \sor !!!....e加改左
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$ D/ T' J* K) Z; Z0 h5 g- M0 d2. 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- b% O' m5 \6 t5 B1 @( A' [
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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:
! I+ B9 {( a' {6 [! `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.1 M' H0 w2 {1 n$ Z& m

7 l  l8 O) `% U+ Z# Y4 fThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:3 s( M/ e1 R& \
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.) Y2 l* \$ O, @# X

9 ~6 f: H4 A0 l8 IThanks

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$ U7 s$ O7 t- r; _8 v5 ]2 v! a& T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' }1 a3 y2 c- p( p& Y) D; Q
if 1-6 = 7-12     13 is fake% o' F' l$ V( \
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if not
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; O9 \6 @$ J2 sWeight the 2 time
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. T! G6 o6 T8 e$ m. pSuppose 1-6> 7-12
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3 T# K8 u* Y9 Q7 ?( C8 N5 r1-3 vs 4-6
: I& F+ s. l5 C- o" e/ R9 p! F9 S- n5 @# `
Then Weight the Third" Q: Y% {# o0 v# r8 L$ D
3.' `" ^4 i# T' `. a$ o+ E( M
3 }2 V9 T0 u' h: S7 H% Z% n- x0 V
Suppose 4-6 > 1-3
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% r7 Y+ T& T) H& Q1 L5 N3 YJust like the first Step" e# D8 O- a* y

2 j7 t7 V, H- `! e4 p3 [8 ?4 vs 5 , K& `" e/ N- {  N2 o  y# `

6 _: |: m1 y$ yif 4=5 6 is the fake one
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if 4>5  4 is the fake one ( ~8 r& }* J' m1 p' H. w% ]; V+ g
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and so on......................

hello1997

分3組4隻波子秤- B) C' ~1 f5 B+ e+ A' D/ X* O% I+ M
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Group A: 1,2,3,4
5 y( Z5 o' g1 F4 |) s# E& z: gGroup B: 5,6,7,8
3 b; O' C5 _6 g& @# H7 G3 }6 J4 tGroup C: 9,10,11,12
0 g. Q& b# X& H4 ^; _1 tGroup D: 13. x# m, o& R* \. y  R
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Round 1
! \2 c& b- w- R% H$ d: ZGroup A vs Group B  }1 R9 o4 M" V4 K4 ^
如A and B一樣, 即較輕一粒在Group C or D( X; R: r$ t) q" p: H2 s
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Round 2
) H. o8 t/ j' @再在Group C拆成:
7 ]# {. z- {  J. ~6 xGroup Ca: 9,100 b9 u- B' \# y, h9 H9 p
Group Cb: 11,12
1 m, n7 P$ r( @! T6 j" Q然後再秤, 如一樣, 即13為較輕一粒.
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7 ^+ r% ~. Z, L- \5 K4 D% Q  L如不同, 即較輕一組有一粒較輕波子在其中, ! |8 B" }9 K$ A, I8 L$ r8 y
要再秤, Round 3, 之後便知答案.) ~9 K3 W2 y/ s$ e! Y, x5 i5 M

* W' `3 C: X( i$ \4 ^, P) Q* W) Fe.g. #1 假設10為較輕的一粒
" i9 B; {6 |6 d+ JRound 1
* ?2 i2 v7 O& p, ~5 G1,2,3,4 vs 5,6,7,8 = equal3 w- u4 \( z" L3 _5 ]

4 o, C. i0 v8 p6 w, @. ]9 yRound 2/ F! p- _  }" a8 v
9,10 vs 11,12 = 9,10 < 11,12
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Round 3, D% Z( ]1 z) R% L
9 vs 10 = 9 > 10
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The answer is 10.
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% M/ f. d9 L! f6 B" r3 He.g. #2 假設7為較輕的一粒
3 w: O" S5 Y5 y- j! dRound 1
* a1 p" Y8 W8 [# W8 A1 Y4 P- _1 H1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 20 B1 f1 X! d1 _
5,6 vs 7,8 = 5,6 > 7,8$ O7 O/ \( N1 K  G& B  ^. Z0 \
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Round 3
: l2 J. ]( }0 [+ S! P( |2 q7 vs 8 = 7 < 8& O1 S/ ]/ A% @) k

) w7 ~3 b3 V1 j& X; MThe answer is 7.
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e.g. #3 假設13為較輕的一粒0 c# Z) z' w/ M# j4 r, F# t
Round 1. ?, g9 j5 U) J( p
1,2,3,4 vs 5,6,7,8 = equal
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" j! t% m. W! S( vRound 2& W6 n/ M5 K6 Z- K# v
9,10 vs 11,12 = equal; P. Z( @1 s2 ]$ h1 m
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No Round 38 h, x2 b8 M3 s3 W% ~* s

% t$ e# N* L) w3 UThe answer is 13.
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  q* b2 V; z, ?: v1 e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
: r7 O- g* S" @9 K2 X, x; C, K3 ~if 1-6 = 7-12     13 is fake( A! K3 U( Y6 {
- k4 M) |3 Z. a" \# b
if not - R3 R. D1 X" N( C6 d

$ u; }: p! r3 c6 ^0 e; r& wWeight the 2 time
( Y8 d/ J9 N/ o! w/ m" i
- A( e( m8 X% @Suppose 1-6> 7-124 B  F0 q: n0 V, m! q% ^

+ r& g$ w+ X% Y1-3 vs 4-6
3 _5 A  z* |7 i+ s  \% E
9 `( Y4 _8 L1 x6 s/ kThen Weight the Third
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+ F5 y* x' s, Q+ R4 V: D8 `Suppose 4-6 > 1-3
1 J2 l& b3 B/ w! Z+ q
0 `1 \% g, H2 X: n0 Y$ |Just like the first Step- h" U: v( f( M8 c0 [' j( s" {

) ~3 S" L3 Z) q6 }  H- r5 e4 vs 5 4 a  ^+ m6 ]6 n0 @' \" Q0 Y. \

$ Y6 w  A, r; s# Gif 4=5 6 is the fake one
1 B) j3 y7 B+ {0 {: O# c/ k3 A( n" t/ N" g2 Y% J6 K7 T, j! Q
if 4>5  4 is the fake one 4 V$ v2 P. V8 U5 M; F
and so on......................

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: z+ t% o. v/ @5 j8 H8 f5 e3 [問題第二步
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Weight 1:  1-6> 7-12( j( i% N5 Q# f; w
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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???4 S2 L2 q+ ~3 f
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問題第三步
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: G2 q5 X0 P0 w% T! d% t. hWeight 1:  1-6> 7-12
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$ j* {0 O) m$ f- s$ h" ]2 _( OWeight 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