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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9 d& d! G7 J+ ?  Q1 |" ?  Z『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)。1 M; T: k( }+ P5 r
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？』& S% n. A& R' ^3 `+ T- A
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注意: 2 Y6 ]5 F# E  q) G# H

  B$ V! H8 [; x9 X1 J& n  O1. 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:# w9 A, H& N& m. N8 Q
相信e條題目都有吾少人玩...

. ?( ^2 ^- c1 J5 U我以前畫左個chart去答,3 B8 {2 i: Q6 B, i3 E
等我搵下仲在吾在) m3 q+ ]6 H$ U5 E; \/ r3 M2 ^
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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:
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, t( q- R: d+ X: {. x我以前畫左個chart去答,9 P  M& [8 I, o0 Y4 h
等我搵下...

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) H- t; U* _6 E3 v8 b/ ]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:
# ^) ?8 W% ^- K( g$ g# s( v唔識隱藏...已經諗到..

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4 k* @1 T; {- a9 p0 |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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9 v8 |1 J; m0 r. t% ^- m[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
; j% f  Z1 V$ N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.- u1 \" M0 u- S% N" ]9 r
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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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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
: S) u1 a5 n8 z* H0 K* W+ k: F1-6 vs 7-12$ t5 z& B$ k3 s6 {, n# @. t; K
if 1-6 = 7-12     13 is fake
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if not
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2 k0 I3 ?# L# S4 ~Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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6 X7 T, W, t$ E) B+ H7 D) h4 uThen Weight the Third0 S0 v9 H, S! U) n, q* Y7 s
3.
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/ t% h) z# K- ESuppose 4-6 > 1-3
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Just like the first Step4 q' h8 R3 d% |6 `1 Q7 ^

: F  ]9 |) @1 f3 M# U/ _+ H4 vs 5
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/ ]1 w. i& F' Eif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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+ _4 S8 y- q1 D% mGroup A: 1,2,3,4
: C: p3 a( K% t) v4 t1 q2 }Group B: 5,6,7,8
. o' ?  n: K( u4 ]  i# {7 O! d+ H1 VGroup C: 9,10,11,12
" f4 e% ~6 O  F8 h% UGroup D: 133 J3 \6 v& {, [+ B0 s
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Round 1
7 b: Y* e- e8 t( U3 b: @+ `Group A vs Group B
1 D, ^6 ?/ x! d+ c4 ]$ O" Q8 q1 J  r如A and B一樣, 即較輕一粒在Group C or D% u% r! ]) D+ I% z

. B7 W- K' M! z, \. `7 fRound 2
7 ~1 [6 Q8 M5 C再在Group C拆成:7 l5 V- p4 w4 o. H1 n
Group Ca: 9,10
9 \: a/ R) }9 t5 G4 {& p8 kGroup Cb: 11,12, \5 ^7 @( `5 S0 H
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, 8 g! t. B! g8 W; |, C
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
9 }! {$ p# E8 `+ LRound 1% q* c1 w8 w! T8 i; h) b* R1 @
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
2 Q0 O' d' [! F9,10 vs 11,12 = 9,10 < 11,12
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9 vs 10 = 9 > 108 q$ ]/ ]. z+ e/ d" V. f5 N
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The answer is 10.7 ^# R$ m, g7 u
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e.g. #2 假設7為較輕的一粒5 r: D! K; X) z) q! X$ i
Round 1
/ q- R$ ]7 a3 ]" Q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8) i6 X1 A8 Q0 t. G# T" }

4 f* C9 w3 G* Z8 n! \2 |5 w# cRound 2
6 p( \! o$ i* X3 f5,6 vs 7,8 = 5,6 > 7,8
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Round 3! I- ^: _' X3 D5 [: L
7 vs 8 = 7 < 8( W: Q7 B# p! U, Z! u; H
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The answer is 7.
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" u/ r/ n( ^6 v: c8 Z, ee.g. #3 假設13為較輕的一粒* s- ?, X/ W3 X* b
Round 11 e. h3 `* W- P- t! C
1,2,3,4 vs 5,6,7,8 = equal
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/ f" l7 u5 `, @# S+ M; R* S, ERound 2
3 U' q8 z; o5 n* S" W9,10 vs 11,12 = equal% A6 j- c- h* _
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No Round 39 m1 e9 b+ [2 @! z, R9 B/ {) i
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The answer is 13." y" o6 D; e. n- g3 `$ \- j8 [

  W: N! x% @  T# g2 t2 y- d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 |+ y6 f; J9 V9 }& ?# }2 Z$ R1-6 vs 7-12( U4 d+ |: U+ }, ~# H
if 1-6 = 7-12     13 is fake: N5 z7 a+ y- t/ Q& C2 O2 m8 X

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Weight the 2 time ' W, `$ I3 c8 T, X

' r3 b6 j- Z$ B6 ]Suppose 1-6> 7-12
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5 r3 ^) U% N: P, ]1-3 vs 4-6 / _' f4 M' s* W8 a, Q# `- ~5 X) m
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Then Weight the Third( |# p; V$ G1 Y
3.
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Suppose 4-6 > 1-3
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Just like the first Step9 r# d0 r+ L1 m$ S9 A. I

5 r4 e; q# L1 |0 {( J4 vs 5
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& ~5 a7 z  `$ @- X4 e/ D& v+ qif 4=5 6 is the fake one ) C0 [0 M* E; x  |) H4 j

7 p) J( w% Y$ ~% k! h* E5 zif 4>5  4 is the fake one
9 c, R$ R( j3 M# A8 Y; f( Y9 Iand so on......................

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問題第二步# y4 |% _/ K; ~3 w! e6 `, U- S

  A& m* U  m9 Y3 RWeight 1:  1-6> 7-12
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  N/ R; T/ {0 S0 ]$ e6 y* eWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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9 ?  f6 V. E* N你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12% _& }3 S( `' E' S, s/ t4 q
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Weight 2:  4-6 > 1-3 ! {4 C" ^* H/ E5 ~2 ~
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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