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)。7 H& ?# J6 z$ [
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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注意:
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' k& d1 l: P" E' A1. 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- I$ g5 d% {. F$ F8 Z, ]
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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) A8 C6 S( o- A  @5 g# m  W

4 ^5 C! X1 Z$ D2 Q6 X3 m[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' P+ G- p2 S* U, T# E0 r; z相信e條題目都有吾少人玩...

) j$ I6 ^2 F& j$ n1 m* J6 g我以前畫左個chart去答,
& s( F2 g: N7 `" J等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
9 \, l. _( Q+ |) k13.........
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  b& i7 \/ u0 n[ 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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0 X3 Z6 z: T- R+ {1 W& S7 H  C我以前畫左個chart去答,
" y% ^+ u( g3 L! s- V$ h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:
7 o7 E, m6 w4 K$ S& N% `唔識隱藏...已經諗到..

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sor !!!....e加改左
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0 |4 H4 I, c7 |& w) K* s2. 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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& c0 ?7 `9 `# y8 P8 c[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- [5 B; |" v) K: 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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 |8 N0 t2 W, v- Z
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: U: v* T9 [& h: I7 ~" EPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ R* ?& F- I% g* G

% y% x2 E6 n( y2 O  G, u; cThanks

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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

1.4 ~2 d" n1 G) Y1 O; F& Y, q
1-6 vs 7-12! Y5 x" I0 c% W
if 1-6 = 7-12     13 is fake& Q3 Q$ V% F( j4 w4 i% M6 j% P

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' Z! |- c; }* T0 i2 ?% kWeight the 2 time ) P( k- f# G4 _( I5 X: y% {

& n' O8 G% q7 pSuppose 1-6> 7-128 k" [9 f/ |7 O/ Y1 M7 B* Y4 U

1 N  t) A5 b0 G2 ~+ m9 y+ t/ K% d+ I/ ?1-3 vs 4-6
* W! a2 G6 x; C' C' l% u8 m  H# [$ x
5 h/ B) [6 c/ @8 U; E3 t5 l( CThen Weight the Third
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3 w* ?5 T7 a$ s& v+ ~9 Q; oSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one 7 C9 E- f2 t; j, f- r
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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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: G6 C) p. u9 c! M& pGroup A: 1,2,3,4
1 o6 |- R" o5 I! wGroup B: 5,6,7,8
; T; u9 ^8 L# d3 tGroup C: 9,10,11,12( P! q& T2 e- M2 g1 D
Group D: 13
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Round 1& Z; w. R  j1 N# A6 U8 p
Group A vs Group B- \( A: a  R  g2 a- t4 Z
如A and B一樣, 即較輕一粒在Group C or D
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Round 2, w; k. u9 ~% w- p  e8 s
再在Group C拆成:
" U! N  d  N/ {7 hGroup Ca: 9,10
/ d* Q- s; v! eGroup Cb: 11,127 {6 i$ h% a: S! x
然後再秤, 如一樣, 即13為較輕一粒.9 |: u. V- t% g# N

% a( x$ V) v( S* D6 ^, h如不同, 即較輕一組有一粒較輕波子在其中, 7 v  ]9 D1 N% y  F
要再秤, Round 3, 之後便知答案.. `! e( B0 y% r4 G6 ~, |* I

3 A6 Y4 I! Y$ ~  {e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal( S0 w0 F7 [, `3 S9 M( J  x8 t

' R3 \6 g1 n5 d+ u' |6 t% mRound 2
4 t  k2 z( p) l, y' {+ x6 H, Z/ o9,10 vs 11,12 = 9,10 < 11,127 f6 Y8 X. V/ t  C1 s% a

4 }+ e) t! O5 M' ARound 3; u. o' h' F: m8 U9 l
9 vs 10 = 9 > 10- l5 L  p" N7 ^# f- p6 P% j
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The answer is 10.: ?7 O! d6 W3 G9 ]
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e.g. #2 假設7為較輕的一粒
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9 p. u& u+ K+ I& N, K* a: N1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; w. n/ y$ Q  ~" _! B$ g+ ?
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Round 2* v: Z) a& T2 q9 F  p# n
5,6 vs 7,8 = 5,6 > 7,8
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% p! P+ |9 D1 F- jRound 37 X) ~4 i/ p% y
7 vs 8 = 7 < 8
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# r$ z9 e9 ^% ?& M) J4 D* \0 ?The answer is 7.1 \2 P. _6 Y! j5 Y( e' r( |
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e.g. #3 假設13為較輕的一粒
/ }2 p$ g% X% L$ _/ |. s1 WRound 1
' l' }* L1 O5 @* c$ p' f" z1,2,3,4 vs 5,6,7,8 = equal$ f: g0 Q) ?3 w8 A3 M$ Y
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Round 2
' r4 p  i7 {: i/ c: V6 W6 c9,10 vs 11,12 = equal$ P: c; e4 d2 f8 Q; {6 G* v

  ~9 l( k/ F/ sNo Round 34 ~' D% a7 R1 ?8 w- [6 |. k

6 n& l. z% ~5 I( I/ `$ MThe answer is 13.0 h# Q, ?" U" N: @$ K1 K) D7 ~
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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:/ [" r# L) ]7 u6 Q0 @& S% j" `
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1-6 vs 7-12! |! m  k# ^% V3 Q* Y7 Z2 G3 B
if 1-6 = 7-12     13 is fake& [1 Q% j4 o# c% K

4 J) q* y7 N6 nif not
  O% `" W! T  l! ?7 B* L( t$ A, Y. N
Weight the 2 time
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1 I: k5 L6 [+ r3 H: W: r& Y9 ^Suppose 1-6> 7-12
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1-3 vs 4-6 " B3 k# E1 D2 A0 b# @. c5 N
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Then Weight the Third# I( _2 X* `" e0 s8 {% s
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* q& `, ~' t) USuppose 4-6 > 1-3, p; @) C) V  h3 ]2 t
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Just like the first Step
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4 vs 5 * t0 A: ]/ v- ]  R3 E& L( X
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if 4=5 6 is the fake one $ s4 W" `4 A3 x1 g# ]
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if 4>5  4 is the fake one
! h! P/ k0 j' u+ N3 V+ Hand so on......................

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4 Q+ a" H3 E2 ^4 V問題第二步1 h5 a( S. I5 k; u4 T3 i! H
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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4 |5 y0 L2 V, q6 }9 |5 T9 ~你第三步点去搵 7-12 边一粒???
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========================================
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4 u  [% e! L4 ~2 d! o問題第三步
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Weight 1:  1-6> 7-12
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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