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)。
2 y/ A; w7 ?# w7 w$ I( b" c5 z3 _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？』, B6 S8 A9 f, F( O
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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: s, Z7 q# x- z; s

, z' ?7 C% w9 f% |5 n, @1 i2. 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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: \& O# a! `+ p1 ?[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
, H$ _  O$ g" r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,
! ~* M8 m: i6 |等我搵下仲在吾在/ z) c. m0 |6 i  o2 O- }

( U9 l( m, ^+ o5 B! a/ q# m當日用左37分鐘答１２粒波子，差７分鐘才合格。. W, ~$ z+ m9 h* T# h. h
13.........
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8 n1 `" }" v9 v2 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:/ ]  {; e# @+ G
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我以前畫左個chart去答,* e% m7 f; S2 b0 @1 v+ 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:
6 G! e3 W$ h% Y4 b0 i唔識隱藏...已經諗到..

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sor !!!....e加改左  Y  ?2 |" I2 V8 I
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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% |/ i+ I9 c" T( k+ K6 @8 n

' G6 O$ N: _) K! s[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' e: V7 u2 e1 s; I
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.4 |, e/ z! p  S8 O9 n  R! Q

* V, l' {3 K3 M$ YThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- k! A+ s( ^; m/ S

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.; ~4 ~( k4 k; m5 Q* E& m
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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

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1-6 vs 7-12
! q" L/ {3 F. G1 u) \if 1-6 = 7-12     13 is fake0 T- v7 Z: b" B8 o3 w' i, t
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if not ; U) V; g- G# c: l9 n

! b/ F4 l: s. z) S0 XWeight the 2 time ; G" E; X, `- L% s
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Suppose 1-6> 7-12) c7 `* V7 y; x, b: i+ q
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1-3 vs 4-6 ( f; ]! N- Y( I  e1 R" |

5 N! W8 H- h! {) zThen Weight the Third
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  c/ R6 b6 \9 }9 C9 i" H( fSuppose 4-6 > 1-3
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Just like the first Step' k* J4 b& ^* X2 K* L: _5 j. i4 `
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4 vs 5 5 @, U( q& n6 t! [0 Y; i, Z- T) @

( m( R% Q8 s- R" C5 O( {if 4=5 6 is the fake one ( a2 r  P' y( T4 D" j

& M+ @/ `% z  W# b1 T9 d$ C2 p; X4 fif 4>5  4 is the fake one 2 T* s# f. l6 l/ _/ ?3 c2 q. u' I1 H
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and so on......................

hello1997

分3組4隻波子秤
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! @% u1 p+ l% s- `& uGroup A: 1,2,3,4
2 b/ H1 R/ {$ ?Group B: 5,6,7,8/ G. u9 K+ Q7 y  e5 @) n! Q4 Q
Group C: 9,10,11,12/ M7 t# E* \, S" ]& {9 R) D2 f
Group D: 13& p8 W/ R- W% k: _
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Round 1# H9 x. B" ]  a2 c/ G; |
Group A vs Group B" c( a) z' |  c! a. _8 O* S$ ^
如A and B一樣, 即較輕一粒在Group C or D
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. p0 c& g; c4 Z9 T8 E3 M/ oRound 2
" _3 e# Z) a0 H0 a- i. W: {再在Group C拆成:
9 i, {- D9 K: ]0 RGroup Ca: 9,109 [0 V# }& _. X) [1 R. p
Group Cb: 11,12
+ ~7 j. I) K+ K, f7 @: P. X然後再秤, 如一樣, 即13為較輕一粒.
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: f8 p/ ^* D" K6 V如不同, 即較輕一組有一粒較輕波子在其中,
" x2 `+ `' y9 p# v( Q2 u要再秤, Round 3, 之後便知答案.
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; R( ?! U# a0 Q9 @) T& W2 \/ p5 ^e.g. #1 假設10為較輕的一粒
* s7 Z2 `, ]* p: NRound 1
& m9 f) O1 D; j% _8 u1,2,3,4 vs 5,6,7,8 = equal. i# V5 Q$ d8 m8 Z
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Round 2
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Round 3. t7 C. |* z" D+ \
9 vs 10 = 9 > 10
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The answer is 10.
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$ C. J7 p$ I. U  s+ J" q4 e+ ee.g. #2 假設7為較輕的一粒% l) v( u7 V  b; o3 I. Y' A4 N1 V
Round 1- K8 c% P! _  @6 w
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
) |6 w& d( Z5 ~. b5,6 vs 7,8 = 5,6 > 7,8
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# D& W; [' f0 i2 A' h5 b$ LRound 3
; y9 T4 n/ r0 ~7 vs 8 = 7 < 8# S  I2 e3 x4 g( R( L2 c& O
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The answer is 7./ x/ f1 f. g1 h: d
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e.g. #3 假設13為較輕的一粒
8 f" o3 \, x( m# kRound 1, E+ s( A* S  R& ]
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
; o, v( G- l& c9,10 vs 11,12 = equal" y$ G1 X  Y4 `* q0 g2 P5 U

& r$ W. e/ h8 B( ?) z3 |& T+ ^No Round 3% o6 [3 W  n* k; {  ?2 t" E
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The answer is 13.
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- F0 i( A+ K) D1 {! a: n唔知我答得正唔正確呢?! , f# p3 v8 I! q) h

6 H1 R0 r, ?- X* w. L[ 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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" H" W% H" x* X4 _& g1 r1-6 vs 7-125 z% w9 X: a! S. ?
if 1-6 = 7-12     13 is fake
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if not
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5 h0 B$ ~9 z9 i/ k& |/ ]4 x4 k! zWeight the 2 time
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1 f: R, c$ h% [; f" _Suppose 1-6> 7-12
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/ M0 M0 p% P5 K8 {2 s  q2 D- g1-3 vs 4-6
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Then Weight the Third- {6 e7 \' w- y- x& w
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9 E. m, X2 ^) wSuppose 4-6 > 1-3
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5 l5 a5 |: _+ b- zJust like the first Step
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4 vs 5 ! W# s  F0 Z) f0 n5 L
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if 4=5 6 is the fake one + }1 H& L7 G' ]3 r  P" {

$ w: K" c. s) T& o  S7 o4 dif 4>5  4 is the fake one
- P( c8 k/ Y+ c5 r; `, R& ~and so on......................

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問題第二步6 e; x/ R. @  p7 C3 f

" X: F: v9 q+ _: FWeight 1:  1-6> 7-12( ~+ v9 S+ {: K9 T

7 w" N- Q, K0 t  T% N$ UWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6% l; Z0 ]& Y) ]8 X# t

( L: a3 a( ?6 g$ p$ d; n你第三步点去搵 7-12 边一粒???1 b/ B. a$ D* u8 b2 [8 A; f

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* y; c9 k% H0 t2 H1 B! B5 W問題第三步7 U1 F7 S" n# ?5 R5 \4 R+ ~

( R' H% i  D& b1 BWeight 1:  1-6> 7-12
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2 r5 h. n1 a! ^! m# q6 q# uWeight 2:  4-6 > 1-3
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& E1 h' X" [  p9 e5 x1 ]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