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
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% ^+ r' v; y6 _5 p! S『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 h& I" M6 n$ N6 Q; c8 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？』
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0 b4 h4 n! }5 g注意:
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' Z! M. `. B' T# I  D1. 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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: u; E1 V9 t1 y2 _9 q- V0 B& Z2. 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4 m- m' @! n' \7 X5 ?. t+ I- T

) n: C; i. f2 l3 M. G% h[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
- l9 \  U# o9 c, x* E: g相信e條題目都有吾少人玩...

' a# \2 _: u3 N1 A* g我以前畫左個chart去答,. [0 Q& E  R- x: L! E% y7 x
等我搵下仲在吾在
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2 L5 W9 j9 i$ d* O6 ~5 g, a當日用左37分鐘答１２粒波子，差７分鐘才合格。4 L: V% T2 `. V) b$ a! D  Z
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:3 \9 B' j9 r; R7 C

2 B3 N' }5 s, z8 b2 s7 c" I# ^3 V我以前畫左個chart去答,
* ]- m6 Y; N" w8 F. D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 z# X1 H9 X' E( h% y5 _0 m
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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
4 T4 o) y) P4 K# k. s3 ^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.$ k8 k9 ^: S3 w# ^

5 g- V0 z: H. Z7 S& v4 y7 o: ~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.# [- i& o( g  Z- W5 q/ u% n
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Thanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
& b: F3 _5 z% y9 Z  Q. ^3 ?1-6 vs 7-12/ L) M/ X1 T3 M7 \* n9 ]  T
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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% `# z1 R8 |1 U, w/ m& X$ @$ y6 [$ q9 LSuppose 1-6> 7-12
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- H0 L8 O* ~1 h% F9 n1-3 vs 4-6
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Then Weight the Third3 G5 W$ ]. B% g, `% E
3.
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Suppose 4-6 > 1-3
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Just like the first Step8 ?6 U. }3 F  g4 J9 k, M, g
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4 vs 5
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+ Q0 p" `' o( s8 iif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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$ T, t( z% b/ \! ~# `* _( nand so on......................

hello1997

分3組4隻波子秤, E0 c% g, t! U3 O$ y8 a

8 ^/ R- M4 \) S. L# oGroup A: 1,2,3,4
4 r+ s7 ]1 ~1 b( l9 VGroup B: 5,6,7,8
0 |) g4 k+ W$ R# k3 vGroup C: 9,10,11,12
9 Z4 b- W; m4 h; rGroup D: 13
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. a. r( D2 n- A1 cRound 18 l6 R# V4 G) w9 \. e
Group A vs Group B! o$ D# p, R4 Z, n8 I8 j6 [2 h
如A and B一樣, 即較輕一粒在Group C or D7 u0 l$ o# l6 ]. ?! j$ X

$ |1 i  M* o9 V, Y8 SRound 26 V/ _4 i0 H$ G& I0 p3 x& [
再在Group C拆成:1 s. G  v3 n$ I! h
Group Ca: 9,10, l2 Y* X$ }& m  \! z+ D( }
Group Cb: 11,12
/ j7 @$ O4 W  o) P然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, $ X6 M  u/ ]( x: M* i" _
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
5 |! \1 M# z& |% f, G8 H0 W/ m: KRound 1
9 k& l) g: ^/ i9 \; @1,2,3,4 vs 5,6,7,8 = equal( N0 i9 ]9 X; W3 P
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Round 2
- F, y" O& ]! X" Q9,10 vs 11,12 = 9,10 < 11,12
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Round 3
* V, j1 e0 F$ \9 vs 10 = 9 > 10
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The answer is 10.
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6 |# `) M3 N% y  de.g. #2 假設7為較輕的一粒5 T/ J6 x5 A; U: B9 Y. a
Round 1
4 a; @+ a$ n: {$ a" l1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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' R! {& _, `, j+ Q5 U4 s" ?Round 27 o4 m: ^7 D( ^$ w' H
5,6 vs 7,8 = 5,6 > 7,8
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Round 3$ S( m* f5 X- G/ ?
7 vs 8 = 7 < 8& @5 Z2 I+ n; P+ B" e

" F; C/ R( l6 H* s! G% jThe answer is 7.
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal0 Z3 d! o. I( b7 }! \
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Round 2$ H: Z) n! J8 l' |) u5 j  z% s
9,10 vs 11,12 = equal
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/ m6 @  H, M4 h: mNo Round 3& G+ ^. ~7 L8 t, {0 O
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The answer is 13.
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唔知我答得正唔正確呢?! . |' ]- ^) q& f$ X- U
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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:1 {8 m  T$ W4 ^/ u, Q- T) n
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1-6 vs 7-12! {( r  N) v: @# [
if 1-6 = 7-12     13 is fake
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9 n, F1 I0 s, q& G6 i* XWeight the 2 time
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. k5 l* @2 v* e, R/ N% v5 H9 ~4 jSuppose 1-6> 7-12
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1-3 vs 4-6 6 z4 D1 h! ]( M8 `
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Then Weight the Third
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, I6 A! C+ z1 U$ xSuppose 4-6 > 1-37 ~5 J$ ~& A& G: `# e* D$ L  }7 \
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Just like the first Step, j& c+ e$ i' U. O4 O& ?; q' V

+ p" a- W# a3 y* z4 vs 5
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# ]6 e. n5 g# ?3 l+ ]0 h; B4 \if 4=5 6 is the fake one   S( o7 K: e9 X. B5 S" G

- x2 d& q' o! i  k. }3 Uif 4>5  4 is the fake one
* [' E0 L* `! G, K7 M: Fand so on......................

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0 l+ W8 u8 @8 ]2 F3 ]7 x* ?問題第二步
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: F7 t& [- p2 w  DWeight 1:  1-6> 7-12% H) m+ S( W% y* h5 R/ j' D

; o2 i: N; G& |" I- E" D9 _Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ w, K' v3 R: ^% ^3 Z# n

- T' _4 {: p' L5 G你第三步点去搵 7-12 边一粒???
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" D6 N) i- Q9 O% L8 D+ q! n========================================# b6 j/ n  y2 p# |2 `

/ b  t- }* r& v問題第三步2 j& \' h( j: }8 t3 u- z3 c" ~
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 3 T# ^% p$ p/ f1 w

/ B4 W/ l* h8 r% C& v1 D. G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