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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- F# `' i2 D2 {『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)。
- s! q, @  h( Y* 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？』" }: _! @) ~0 N
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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! _8 f' _0 u# E1 m% O% R0 E$ k
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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8 l6 y; y+ V( _6 v7 e
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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:- F8 W9 i) R6 D5 `, i: X8 Y
相信e條題目都有吾少人玩...

5 V/ p6 Q* L9 i! G- b4 _我以前畫左個chart去答,
: Y$ f9 d& N) x3 Y' _9 e. X等我搵下仲在吾在& u9 S2 c2 c' ^/ T

" Z1 @5 Q7 R7 i7 F) t4 R  o當日用左37分鐘答１２粒波子，差７分鐘才合格。4 m8 v, |! `/ s& Z( X/ f2 Q
13.........
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6 s; l7 }! B- Y, \1 \, o[ 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: N9 g+ [# ~0 T我以前畫左個chart去答,' m8 l+ q. p4 ?3 O* R
等我搵下...

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6 }& k& |  h/ \5 }0 D& i, f* ?- k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:
+ s) j  Z8 Z; I) _* L; d8 `唔識隱藏...已經諗到..

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% _3 Q7 S1 M# s! C+ Nsor !!!....e加改左
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3 N  b8 e$ l! @  y2 o2 C2. 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:: p1 y. L, Y4 M" m
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:' z& v6 z( C( q6 z" ]& ^
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.9 ?+ b, [1 s5 Q2 `1 v
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Thanks

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7 D& B; J6 a/ [9 m3 \3 F不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
- B- {' h4 N4 J& r. f/ o1-6 vs 7-12
! u2 }/ ?% K/ C5 L: M7 qif 1-6 = 7-12     13 is fake
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if not . \/ }% G- ~' A6 [
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Weight the 2 time 0 _/ w- G6 V% k8 }

; v4 K1 t  e2 m6 @5 C7 {Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third, M; J1 Y4 t- P* r- q' w
3.
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/ \9 U, S/ I! S+ YSuppose 4-6 > 1-3
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* E. S  T! }0 i$ HJust like the first Step
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, W# G4 s9 P% a" n8 x9 [0 t" k4 vs 5
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) M6 H4 f: R* w' r: H; _+ B, zif 4=5 6 is the fake one ; r( H* H2 I$ A

5 W# ~! C7 T0 h' z' s0 z# e# mif 4>5  4 is the fake one 0 \8 v6 c8 j' [
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and so on......................

hello1997

分3組4隻波子秤
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: Z: r3 z' ?/ f/ j4 d# U* HGroup A: 1,2,3,4
* j7 k4 i1 G$ q% M. f( \4 L* _6 gGroup B: 5,6,7,8
4 B1 P6 R; j  F+ }$ `8 m/ nGroup C: 9,10,11,12; X7 r7 Q$ Q' p2 \: O; l
Group D: 13
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9 Q+ a- T- w. y5 a6 pRound 1& V( J$ ^& ~4 L+ `0 p
Group A vs Group B* U7 O- Q) c/ w: ]- ~+ z2 P
如A and B一樣, 即較輕一粒在Group C or D- ]2 Q! e3 Z/ |. J- d" g0 a
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Round 28 Y$ q, W* [# g, _$ l
再在Group C拆成:
  p5 ]) w  n2 I$ ^Group Ca: 9,10( e% Z+ ~3 u2 L3 T' g$ {
Group Cb: 11,12" Z8 |; L" C8 w$ f2 C
然後再秤, 如一樣, 即13為較輕一粒.
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8 O$ B" @- E) Z/ Z' }/ B% ~( X+ l* ?% c如不同, 即較輕一組有一粒較輕波子在其中, ! i  b! \* x% W& M
要再秤, Round 3, 之後便知答案.
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5 Z3 z6 _: C- Y2 ^e.g. #1 假設10為較輕的一粒0 N. x9 L0 K. h: k% e4 e" u# g: c
Round 1
; W0 _1 B+ x7 \2 j6 e, ~% O1,2,3,4 vs 5,6,7,8 = equal
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Round 2
) n) V/ x, h6 L9,10 vs 11,12 = 9,10 < 11,12. d1 Y! G5 m) x5 |0 {; u

1 u: Q/ g4 b5 i! m6 {& ZRound 3
4 t) p) ?( ?; T* s9 vs 10 = 9 > 10
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The answer is 10.
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! ~& T3 g( _: i( u2 re.g. #2 假設7為較輕的一粒
. i4 K& v5 ~( k; [1 B: H. Z1 T& h. |Round 1' g: ^( `* ~5 Q) x7 E5 W/ W
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8' H0 F6 d% N( \' X& b, S% j

( I: ^4 n- Q: ]7 b' MRound 2
0 {) Q# `" y+ R! `% I1 `5,6 vs 7,8 = 5,6 > 7,8: ]" t. n- T6 J1 |( j+ A) G

1 m0 K7 X) u' S+ F+ o# vRound 3. \* A  W/ H) [9 t  n
7 vs 8 = 7 < 8% m) `5 P7 w% I4 E& i0 P/ S
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
2 H. x  K" @+ U! V8 ?) fRound 14 p+ W; P; T9 O# v1 E( {5 _
1,2,3,4 vs 5,6,7,8 = equal3 ?$ \! n0 R( g: V! i7 ]
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Round 2
; T; P8 l2 Y7 ?2 I" F% A: J9,10 vs 11,12 = equal
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No Round 3; Q" E2 h1 |3 B% c! d* i

% l. y# r) u7 P+ w# |The answer is 13., ^, D/ d4 s5 J4 s7 E! X

0 x; y  `, m4 X) o9 {- v! L. P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:3 J  y$ }6 t$ E; m. c
1.
# m; K: \4 p$ S3 E! P1-6 vs 7-12- k4 l7 Y6 X& [) v; Y9 i) E
if 1-6 = 7-12     13 is fake
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if not 3 _, `! o8 s. z' c) R% D  f

' R- p8 H3 n* vWeight the 2 time 7 t2 Y7 P& a& U

; U0 m; R5 @2 a  E# o  N5 sSuppose 1-6> 7-12
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/ k0 L) P: Z4 ]! h3 n7 s" a9 W* ?9 |1-3 vs 4-6
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Then Weight the Third
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$ x5 j$ m8 V- G# r+ ]5 _Suppose 4-6 > 1-3! t( R8 G4 R2 d1 d, z1 A

) M, ^2 }" \* z  t( o! q- vJust like the first Step1 L# k3 M; v/ L

  D# G8 z- c4 }  C4 vs 5
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if 4=5 6 is the fake one * F" Q: C/ g3 `* ^+ `- Z3 x1 |
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if 4>5  4 is the fake one + h. x, K9 J5 S2 O  A
and so on......................

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+ c8 q/ c4 H  ?0 ]( O- h4 H' ~問題第二步
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Weight 1:  1-6> 7-12
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  g7 Q: n1 c4 E9 A: @- ZWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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5 e7 r( n/ }+ o你第三步点去搵 7-12 边一粒???
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========================================
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' k. d: Q; P+ T問題第三步" N) [: F2 `" G- j  M6 e

; t+ f! P  F' _6 TWeight 1:  1-6> 7-12' ]( T. G4 t  |$ B* h1 r

' e9 ?2 X1 e% ]1 [5 d9 DWeight 2:  4-6 > 1-3 3 d( I' a+ S0 y( _* B) e3 f
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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