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)。- E' \! o3 i  X/ A: 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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2 i6 ^. |. {3 g1 I+ y. t注意:
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$ T) L6 `8 Y* {% W) ]1 p1. 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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3 e- w, d0 h; d1 q2 ~[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:8 B. ^, P- g% U5 G5 W- p
相信e條題目都有吾少人玩...

# e* b% X- r. s( A& j我以前畫左個chart去答,
( O1 Z3 v- K2 V& V- h  n' `等我搵下仲在吾在1 H  H1 F. t& |4 e' T! j5 a0 X9 F

5 y- C% Z+ j! o4 y! \3 N, |當日用左37分鐘答１２粒波子，差７分鐘才合格。
; v0 \+ a( H' h( J8 @. @% W+ U13.........
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% Q% z, g) m! v' 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:
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) z; p! P# _1 m5 Q8 j$ k我以前畫左個chart去答,
0 J5 r% k1 J9 G0 n3 x) L5 S( D  V等我搵下...

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. \7 x$ b, W& }% J$ P: ~* L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:
% r& h" r9 a1 I' }- I; f唔識隱藏...已經諗到..

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sor !!!....e加改左2 K3 j- y0 X( `! q, q

8 P/ ~9 E! d# k6 e6 L$ G2. 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+ J6 |' h, v* D. {" a; T* P

" m( F  j7 o" K" L/ b3 u& }0 z[ 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; p& c2 V& Z7 l& G5 ?0 }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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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4 x8 m8 h5 m* J% K' ZPlayPlay, 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.
, w$ q+ r( P0 v6 `1-6 vs 7-12: x7 R' [+ @& o1 m
if 1-6 = 7-12     13 is fake  q/ k7 Y( i% j1 U9 q

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Weight the 2 time + E1 \( M! u! p1 y
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Suppose 1-6> 7-123 A% b1 U- H  @7 Q: ~
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1-3 vs 4-6 / l% v. A: J4 M, R* r$ O; F0 T. `
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Then Weight the Third6 p' f/ d+ `, s' a3 D  M
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Suppose 4-6 > 1-3( z- L" I; A+ @& o
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Just like the first Step
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% C- ^/ ^8 N: E7 V4 R4 vs 5
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4 [* g) \& p1 [8 r9 qif 4=5 6 is the fake one
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8 @  e$ p  A! h. `9 Sif 4>5  4 is the fake one # t7 g) ^, |3 l3 _$ R: f

- _5 G. _7 N+ `8 @$ ?# Fand so on......................

hello1997

分3組4隻波子秤+ k( U% j3 }1 i4 S0 N
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Group A: 1,2,3,44 `# p$ |5 @- r5 I
Group B: 5,6,7,8
6 k) l6 x, Y$ E0 JGroup C: 9,10,11,12
7 y% x6 K5 z) E% }+ ^4 HGroup D: 13
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Round 1' r4 K7 M* k4 z9 D
Group A vs Group B
2 F% p, w5 Z/ r' I/ K$ A* {如A and B一樣, 即較輕一粒在Group C or D
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Round 2/ S+ H* q+ o- A8 C# ~
再在Group C拆成:4 u3 T0 @) m4 Z
Group Ca: 9,10* B$ ]/ K+ M1 A$ B2 ^
Group Cb: 11,12
# A/ o/ p( `5 d, o然後再秤, 如一樣, 即13為較輕一粒.# ^6 o/ W# n7 {! u
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如不同, 即較輕一組有一粒較輕波子在其中,
$ c* a0 r) u3 Y, T8 J要再秤, Round 3, 之後便知答案.3 p$ [. p8 d( g) C
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e.g. #1 假設10為較輕的一粒
: r2 q7 n1 i* N# B: Z" pRound 1
, ~- J! X+ D7 c% b( A& W( D1,2,3,4 vs 5,6,7,8 = equal9 d9 D9 t- f4 q) v4 W4 G  ^

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9,10 vs 11,12 = 9,10 < 11,12
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Round 3" N1 V0 R( s/ r
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
/ Y2 X) w' V1 P4 r4 H+ y8 ]% H" ]Round 1% l! v) a* _5 [0 Q! P% q) l
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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, l( [; }6 S; F! C. WRound 2' H0 B# o+ }4 B/ }' k
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
9 K& E( f; v+ b; T5 O) F% @( G7 vs 8 = 7 < 8
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The answer is 7.2 b; b2 S: l3 H
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e.g. #3 假設13為較輕的一粒
9 t, `/ ?3 C* @Round 1
" m* Y' Z1 Z) n# h% l# L6 [1,2,3,4 vs 5,6,7,8 = equal
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Round 2
9 D* Z; _3 ~0 W) e+ u# y0 H/ E9,10 vs 11,12 = equal
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- Y( X3 w" ~* p8 J, f0 o9 w4 qNo Round 3
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The answer is 13.
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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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' F0 o9 z" z8 {6 W3 O. ~! b2 f. O1-6 vs 7-12
6 f! _' f8 W3 q, z! ~  h# Mif 1-6 = 7-12     13 is fake
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if not 1 J/ w' z/ _# |5 ]2 J/ @

( U* A- ^, {: p" D% sWeight 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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Then Weight the Third! S. k9 U/ [* D( M2 {6 g( J
3.
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Suppose 4-6 > 1-3
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Just like the first Step/ r7 U9 ^3 B& G6 S
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4 vs 5
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$ Y7 ?" A  ?3 p: m; cif 4=5 6 is the fake one - c4 F) ]8 P( c2 [% k
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if 4>5  4 is the fake one 1 J& z, C( w. b* b, T4 S2 W
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12* P/ S: Q4 Y5 o" `6 n, h. C1 H( A

5 c# b: S5 h, PWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6( n+ c" Y8 F& d1 ~1 A: g

8 b% ]# R- o* u: D你第三步点去搵 7-12 边一粒???0 g3 [+ @7 N% g" W
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7 E1 Z' Q. b. ?  S' A6 [, {問題第三步' `0 P6 y2 ]6 Y$ ]  x! _5 _" n9 D

% D# w7 ]! q2 `8 D3 b3 xWeight 1:  1-6> 7-120 S$ c* E1 W* s; E

* ]. M" f; e( X, f: @Weight 2:  4-6 > 1-3
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" l1 `6 L2 G0 T% u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