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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『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)。
$ a8 C) s( H7 u  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？』2 O8 N( ~# U  D: ]$ ^6 `% h

0 M( i4 Q2 N7 Z+ Q/ L( s, Y, L* E+ t注意:
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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; `* K$ c5 Q; O* S+ ~! ^! D9 L! N
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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 21:34:0 T' `  V! A7 Y  e# X/ B
相信e條題目都有吾少人玩...

+ ~! C$ H9 u1 U3 J# K: u1 O我以前畫左個chart去答,
2 {- ^) w# C0 a$ M5 y) v6 B等我搵下仲在吾在( R3 i4 b* ]* E) f5 [& H' h
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當日用左37分鐘答１２粒波子，差７分鐘才合格。# t% l. m+ R& P' N
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:
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& u0 A5 s% V& [我以前畫左個chart去答,# x9 q- ]) u' g
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:" N6 s7 H; e. u* d1 W9 ?  p, t
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& f1 m$ \% W) n

2 I0 A% Q+ |3 D: @% @5 R2 A0 v[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
7 L: w& g5 ^  x/ d5 w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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2 Y5 c! ?9 X% K, |+ ]2 hThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. w1 z) A5 h, b) R9 G! K1 C

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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.( `. ^* c" u2 D+ g
1-6 vs 7-12& b+ J5 U8 `. G, J
if 1-6 = 7-12     13 is fake) [/ B, A8 E1 J" W

: w1 ^. D1 q7 t0 C8 Wif not ) M8 ^6 `) ?* x5 [8 `

& O, q6 i& p: K, F+ nWeight the 2 time ; q' p+ t% f( _% W5 h$ o

2 b0 ?/ R0 `" C" j  jSuppose 1-6> 7-12( w4 C" I( Y3 Y8 H8 V) k

+ A0 M+ u+ ~1 n/ w( l& ]1-3 vs 4-6
" y7 u! q( f9 L& g. y: {% F* j9 H2 U+ F. ]+ c# b0 e  W, a9 \! e, \
Then Weight the Third6 Z2 i& \3 K7 o1 l$ ?: k
3.
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Suppose 4-6 > 1-3
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Just like the first Step1 c0 R2 j* _8 z! ]! B" J' W  ?  ?) X2 z
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4 vs 5
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5 P7 A. |9 i; }# U) W9 Z7 Cif 4=5 6 is the fake one & b$ K; X) M! o" C

* Z* l' M& k9 O2 _8 Gif 4>5  4 is the fake one 5 e5 h) D5 L* L: {5 Z

! D% R, x8 w0 T* [and so on......................

hello1997

分3組4隻波子秤# U/ H$ T7 {8 i3 a5 Q: ^) Z0 A
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Group A: 1,2,3,47 T; T9 k; H% x, w3 }
Group B: 5,6,7,8
! J$ f! {$ s, |2 g1 S9 r# b, Z: CGroup C: 9,10,11,126 [, `  D% C0 T3 p' X2 R- A
Group D: 13
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Round 1' p. x# i6 d$ @* E
Group A vs Group B
7 h3 v2 c- i" \/ l8 l1 D: w" W如A and B一樣, 即較輕一粒在Group C or D$ F0 b& D+ K! s+ i
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Round 2
" f7 u3 U# R. w再在Group C拆成:0 Y) ^: F4 S( z/ Y5 X, F- h3 g
Group Ca: 9,10" r- Q) B) c5 _4 n& s! V$ g
Group Cb: 11,123 C$ w; ^6 q% z7 k' o
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, $ ?: g( D! N) X5 e
要再秤, Round 3, 之後便知答案.6 i& E) D% h/ S8 l: _
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e.g. #1 假設10為較輕的一粒
3 W5 O2 S+ ~5 JRound 1
* A' B; l0 _7 z: L' T$ P1,2,3,4 vs 5,6,7,8 = equal
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Round 2( F+ k# E  P* M5 a! I5 ^1 K! K
9,10 vs 11,12 = 9,10 < 11,12
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0 m- [- b! `+ M9 O8 a7 Q# lRound 3
" @6 n7 a8 P8 \) c# s0 [9 vs 10 = 9 > 10- R/ e+ g/ S  y; u$ a
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The answer is 10.5 o# A) p: m2 s5 {4 e  o+ m
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e.g. #2 假設7為較輕的一粒
1 U5 I$ G& l  C/ Y& e, _/ }Round 1
3 t4 q/ X7 l. \. D& N' I1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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. p& F2 ^- e4 g; _; O. B% x) ARound 2; L# ^) C) h& c, p* h- Z
5,6 vs 7,8 = 5,6 > 7,8
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" s+ f# B% I! c% [6 U. aRound 37 g, l( u* Y4 d# C
7 vs 8 = 7 < 8* r9 E# c. E3 ]- M* L& k) a

  i' F5 I6 t& k+ |The answer is 7.& [* G7 g) x( u1 D: T
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e.g. #3 假設13為較輕的一粒
9 c( v( T/ h, L# s+ @. rRound 11 P. O, A4 |, a4 v" q3 [! ^
1,2,3,4 vs 5,6,7,8 = equal$ a! d7 w* i# ?

- [" l6 @2 k: O# _* i. b; R  ?& l: uRound 2
4 ?( p+ s, Q+ X6 x# P6 W9,10 vs 11,12 = equal+ E! b! D0 ]" a9 t) N/ e

8 u. N/ H( |/ bNo Round 3# {& t# Y/ g/ L" R1 Y
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The answer is 13.
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唔知我答得正唔正確呢?!   H; o: c( s! K: ]

2 C' ^! U4 }/ A& [[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:! g% g8 T/ D# q3 a. ?+ J% s
1.# y5 R( R, S! C/ t$ |! c( c& ]1 h9 h
1-6 vs 7-12
. M% \, o9 ^/ A  \# mif 1-6 = 7-12     13 is fake5 K9 \; F& F- X4 _7 e$ t$ K

1 I, a0 @) x: w% E: y4 {if not
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8 m. M4 [. `2 Q& Q* P4 E, z' r% fWeight the 2 time
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& o& ?% }# X4 ~Suppose 1-6> 7-12* I- @0 A6 F) r3 s) V" L* z
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step0 V( F! m, H3 h6 ?# S2 o. J

" j  t: `; M* z0 a! {0 C4 vs 5 1 A) r) I  u: Q
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if 4=5 6 is the fake one 8 R. P  S% Q6 Q# Z1 u# M

1 i( f( `! X( ~# U9 aif 4>5  4 is the fake one
/ @4 _; U! e& i9 W6 eand so on......................

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/ L5 g, G% G2 _1 N6 O8 [問題第二步
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# c/ [/ U1 Y: A8 H$ b3 G" B. EWeight 1:  1-6> 7-12
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1 V$ l! C: u! qWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6" X2 K! L9 Q$ [

* g% g- C' t: l/ W# u- {你第三步点去搵 7-12 边一粒???
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2 T' @  V" {% @. o/ ^5 C; H5 {# {========================================* J1 \- V$ [" L/ ^# U2 h6 G

6 B, g( }0 Z. {8 I1 b問題第三步: n, n2 O2 W6 p7 F7 }4 p3 t

5 _, t/ o! y( r- j' X* }  rWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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' ?$ d; v$ d. q8 V4 v! E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