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! n0 H& I: @; [' w  k, h5 t) D8 X: N
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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)。: Y! L( o% l2 Q& _9 x1 u# X- q
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？』& ~3 ^  A4 y5 Q5 b( m! I0 E' z- C
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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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' _, k" Y" m8 q+ e2 h4 X5 _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# b7 O5 d7 V& C. g9 ]. K6 |5 \

0 [3 M) o- h) s" l3 \5 J[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:3 k1 ]7 X  ?( q% ~) F. Z1 ?
相信e條題目都有吾少人玩...

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我以前畫左個chart去答,
. ^7 G4 f8 C8 d) I等我搵下仲在吾在" k( x, a0 j$ |
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當日用左37分鐘答１２粒波子，差７分鐘才合格。* o6 k- X. h$ i
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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! E- F  p/ O# R* q, E2 S我以前畫左個chart去答,) |# o% N( x7 X2 y6 c- P+ u8 @
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:3 E6 p' m3 t, {
唔識隱藏...已經諗到..

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4 E7 A2 i/ `( i3 Y6 O$ W  wsor !!!....e加改左- {* K9 u- J3 v( `3 i3 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
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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:2 _' V' W( @8 }( M( M& K' e
相信e條題目都有吾少人玩...

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, V5 G- ~, d! R( I& ^* BPlayPlay, Let me know later who has the right answer and I will add points accordingly., U& o* V0 d8 w$ C8 z

0 y1 s6 k* [  O3 O' n6 L, FThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:, ?6 L* n7 O& l, \- S" T0 y4 S
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8 _, ~: I4 Y1 OPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ t) e6 M: m) a: r, f: v
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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.# ^) N! W1 Z% \3 N3 Q& Z
1-6 vs 7-12/ W7 u. `* _" @7 u2 [) A5 c" l5 q
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-125 T  s/ G0 M. M8 I, c% G- S3 ^
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1-3 vs 4-6
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Then Weight the Third
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( Q/ q( F: ?( k0 o5 u0 lSuppose 4-6 > 1-34 G, q: R, s" r1 ?
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Just like the first Step
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4 vs 5   `( u8 L' V6 Y% {
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if 4=5 6 is the fake one 2 L1 l) ?- J. |

4 D$ Q8 p% Q( u$ j: Y6 zif 4>5  4 is the fake one
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+ n& X3 p7 z  v% O& }and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4% n0 a5 g: C& |% P- \6 d
Group B: 5,6,7,8
4 K$ K5 c4 d, U8 r4 WGroup C: 9,10,11,12- V; b; ^4 i+ u) O
Group D: 13- ]/ L. r2 L  o; k6 O: }

2 S: x- A& }7 m0 I" y! B" RRound 1( q# k9 t; T+ J  x
Group A vs Group B
+ h2 F' Q! x4 p6 v如A and B一樣, 即較輕一粒在Group C or D
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9 V8 [0 Z; n& v, Z0 wRound 2
4 G; {" s& T$ p; {/ j' q, K再在Group C拆成:" M& K' g) M$ n
Group Ca: 9,109 D0 t  F& w9 @
Group Cb: 11,12
9 Z* {* i0 l' x8 a7 y然後再秤, 如一樣, 即13為較輕一粒.! f0 l. j& [. A2 h/ Z4 L

! Y' j$ G7 T6 G# ?# @3 M/ a  k9 \如不同, 即較輕一組有一粒較輕波子在其中, % \. L3 i2 l; h7 `
要再秤, Round 3, 之後便知答案.; H& J# {2 K' y) a; l5 Q
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e.g. #1 假設10為較輕的一粒
+ a' M9 c+ E) A# qRound 1
/ `- R2 S( c8 B, w1,2,3,4 vs 5,6,7,8 = equal
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( u( f0 [" l5 X7 G2 {+ ^% FRound 2- m' d8 ]' d1 p  O( q2 `
9,10 vs 11,12 = 9,10 < 11,12' V( E! a' S: m4 K( U, h

  B6 i5 l, |/ T8 yRound 3
  A7 t9 L. y) x7 {, i0 M5 A9 vs 10 = 9 > 10
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The answer is 10.9 B+ d, `% D5 H" T1 z
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e.g. #2 假設7為較輕的一粒  R. i5 ?+ Z9 k) t9 Z
Round 1
5 k2 i1 A3 \3 e  T1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8' Q1 t1 `) z# g7 v) J2 ~* Y
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Round 21 g7 P% j) U- Z6 p# d" Q
5,6 vs 7,8 = 5,6 > 7,8
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% W: u0 i% E9 W/ B9 _6 NRound 35 }" W0 @) L4 t9 j& E/ d( c( Y
7 vs 8 = 7 < 8
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The answer is 7.
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9 X0 N. [* W6 }' }) I9 `# Re.g. #3 假設13為較輕的一粒
( k8 X% o2 D4 s2 u; VRound 1
/ V8 m5 F4 i, K  @( k3 h! ]6 n1,2,3,4 vs 5,6,7,8 = equal
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" V7 i# ?4 y( [' x3 cRound 2
4 ~) _  E/ |/ ~+ K. H, l9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! & l6 |4 G. ?; ?4 {5 Y" N

$ ]. F9 t1 J8 u$ d9 _. E/ E+ n[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:- z; k/ }2 G8 m5 Y) x4 u
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1-6 vs 7-12
% c' h7 d# ]9 N5 j9 t* |if 1-6 = 7-12     13 is fake% c2 ~* V2 f$ X. S2 {& I

# T# V3 |# W- d4 @1 [3 X9 bif not
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0 Q# W! ~# e* L1 [9 pWeight the 2 time $ t$ f1 q* o' C5 V0 h
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Suppose 1-6> 7-12. s+ F: j3 j! w  A7 w$ W9 K% Z2 s( @

0 J" h* C' C: ]- P! O2 V$ _4 V1-3 vs 4-6 $ M7 j; ~$ t3 d5 C  v& v

9 l2 g, Q: {/ p- \Then Weight the Third0 B7 F' ^5 Y3 H- x9 j; s
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' d6 i2 _; D) }6 [1 @Suppose 4-6 > 1-3
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0 Z& i! V; B( ~, g( ]8 f, x3 vJust like the first Step9 ]9 B; Z$ K; S- L( l

( t( ^: H7 C0 V& y0 C3 g6 k* P4 vs 5 $ l- n. T1 J: M5 x2 R4 `

7 f! k7 c. T4 c; e) r5 gif 4=5 6 is the fake one ! x! t4 \8 S' M6 y- \+ j& a
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if 4>5  4 is the fake one * u6 J1 F! d8 G% e/ |6 h* \
and so on......................

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0 v. |  }2 X* e7 [問題第二步
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, g4 z8 V, Z) n1 s5 g/ P9 @4 M! @Weight 1:  1-6> 7-12
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# C  ]# B. O9 d2 [' ]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???
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========================================, n9 h3 D" i4 E. C* B( Y

8 m9 G. S* `& L  [: g4 s) d問題第三步, f: _# X# k7 e8 M. M& L7 x1 e5 q

! f9 m, o4 ~5 I  p% @Weight 1:  1-6> 7-12( C1 [) l2 `% ]9 _
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Weight 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