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)。  G4 V' _( R- a
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: 5 D% t' P9 c3 v+ r) P6 i! M4 s2 y
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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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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  o! @9 a) |; A2 i- m# B9 L
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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:
, s7 j8 T* @- q* D* J相信e條題目都有吾少人玩...

) o( I, p* L. t/ h% j我以前畫左個chart去答,0 ^/ A4 J" \7 M) F3 F1 y- k0 E" \
等我搵下仲在吾在
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) x, M# |1 W  k3 X5 w% ?9 \3 f當日用左37分鐘答１２粒波子，差７分鐘才合格。2 I! T" R! ^1 c7 b
13........." ?% y; `5 s; ~  [+ l& X
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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:& A; k1 @: x5 y

' k/ P. b: a$ K; e5 `$ e% i8 [2 n我以前畫左個chart去答,3 D, N/ n' ^4 u6 s! e2 f  @% D+ y
等我搵下...

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: w5 a) X% R! J: t* S2 S; }  K1 b2 k+ O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:
% t' F7 o; @% ^& a! Q0 X1 }1 b唔識隱藏...已經諗到..

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0 l2 y: O' \- q3 Q6 J1 Rsor !!!....e加改左+ w6 ]7 C. D  o2 o

; @" g( i$ K; K7 I& i5 R3 Q2. 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2 Z/ E! E$ P% [% n
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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:7 n8 b# m/ Z- P; b7 ~7 D
相信e條題目都有吾少人玩...

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( B  n" z4 C) v- kPlayPlay, Let me know later who has the right answer and I will add points accordingly." `) R! l: h8 {6 l3 x- I6 R

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:4 H* Y6 p+ h/ O' s0 t

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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

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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.
, k/ k+ e3 S6 B1 J; E& n1-6 vs 7-12# n; ]( S3 e' }  x
if 1-6 = 7-12     13 is fake
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if not ! K" L5 M5 }0 c4 I1 F

: g: R) U4 ?/ U& H; F5 U9 z) b3 ^! qWeight the 2 time " }6 i' p' L) U. F2 ?- W

2 _1 `3 M7 \: @" B) b) pSuppose 1-6> 7-12) S$ h4 ]# i5 `" E
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1-3 vs 4-6 , K  c4 `, }: z5 h/ }

( R0 W3 N2 ~0 i5 [Then Weight the Third
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Suppose 4-6 > 1-3+ d1 g/ o% K  ~9 {* E

) W, H: K3 L. _Just like the first Step
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* B, L, u8 P! |+ d9 v4 vs 5 + ^( b0 J# ?( x* x( k# p4 X
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if 4=5 6 is the fake one 5 u2 P. r$ d& }3 a* j0 h
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if 4>5  4 is the fake one 7 M" Y7 O  G8 R3 i$ |, [: N4 b

. X. [2 I- R7 E  I- O9 y! {3 f3 Zand so on......................

hello1997

分3組4隻波子秤
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1 a) H: [- a; h! xGroup A: 1,2,3,4
2 S+ E& p; ?/ F: m- s1 S; S# _Group B: 5,6,7,8" M- b/ h  ]" S
Group C: 9,10,11,124 ?; u' M' c  }
Group D: 13( M; C9 Z7 C  E* a
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Round 1
$ {8 A0 w  h, l8 sGroup A vs Group B8 M! T1 m- G6 W
如A and B一樣, 即較輕一粒在Group C or D4 ]2 ]9 a0 ^. g4 [& g

# {1 v; l& }+ p; ?9 wRound 2
. J- Q& x4 r8 C5 i+ @/ x再在Group C拆成:
: ^2 l( f' G# x, h6 }Group Ca: 9,10
7 r; ]6 h+ z9 t' F# L# n0 jGroup Cb: 11,12% I. {1 A$ i' n; n8 d. E
然後再秤, 如一樣, 即13為較輕一粒.# `* T  U% O: i4 h" a  d) N2 \
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如不同, 即較輕一組有一粒較輕波子在其中, & a  a2 E' }# U) W. K: u
要再秤, Round 3, 之後便知答案.) C) E9 y* t" A; R
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e.g. #1 假設10為較輕的一粒
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: L& z1 I  b5 c* T% T1,2,3,4 vs 5,6,7,8 = equal
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Round 22 x) q) K" q2 M! b
9,10 vs 11,12 = 9,10 < 11,12+ y, M0 @6 x& P4 K1 H. S" D2 s

' V: a: f, s% Y# T. m& KRound 3
2 S/ t% A( _$ W8 \3 L4 c6 E9 vs 10 = 9 > 10
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; H$ H$ X6 H5 N7 i/ y/ W+ m# tThe answer is 10.
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e.g. #2 假設7為較輕的一粒& Z# U& n% o1 P
Round 1
5 x7 _8 ?( l2 G8 x1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
( J  j+ n. H6 v5,6 vs 7,8 = 5,6 > 7,8
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Round 3& m2 q. z. T% h
7 vs 8 = 7 < 88 e: G' e9 F* Q$ A( g

8 f5 w5 H1 ~1 H) m( WThe answer is 7.
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e.g. #3 假設13為較輕的一粒) O5 O& f$ _2 m" O8 B
Round 1
* z! K% b& u; ^1,2,3,4 vs 5,6,7,8 = equal; V5 h) \, T* \8 c5 U& z; m
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Round 20 R- m+ i2 P1 a6 M5 ]
9,10 vs 11,12 = equal; V1 y6 c; Q/ m" _- u8 ?

1 }$ _. Y" `/ B! ~4 r0 xNo Round 3
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" L2 x& _5 S" ^: F1 C  r) ]The answer is 13.5 E7 U0 U/ P1 I" v
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唔知我答得正唔正確呢?! , a2 d5 @8 T* [- _1 W6 I

' T: ^$ j$ h) N6 D( d; ~; _: ^$ _[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:, `" C6 r8 m- Y4 t5 D
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1-6 vs 7-12
7 @6 y; G, T" g) x6 {8 T) G1 Tif 1-6 = 7-12     13 is fake. X1 z1 @3 L9 y& e
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if not
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Weight the 2 time 6 }4 h6 e; b4 `; x7 m% W, _
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Suppose 1-6> 7-129 ]$ O0 v$ Q* Q# A) [

$ {" H) t6 _9 N; v3 h1-3 vs 4-6 - l! F6 J8 G6 j0 h# t# h5 Z
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Then Weight the Third' D. u0 U/ S/ T% o4 A) W4 C* |
3.' G; c  \9 M( i* ^6 g

1 T/ `$ T8 i; p" M1 uSuppose 4-6 > 1-3: ^9 b. V" Z  j, B) g

! I. y6 N1 a' s5 N9 nJust like the first Step' K0 ^6 y! R: b7 O$ m
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4 vs 5 0 v. [& `/ H3 J1 f* L& Z1 g$ u' Y
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if 4=5 6 is the fake one ( u* j0 o* c  V& h  r1 {. H
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if 4>5  4 is the fake one 7 n' I% g7 P. V' R
and so on......................

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5 V1 L! r( n8 T問題第二步. I2 `+ {8 M" ]( z  c
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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% u; F6 N8 B: _/ l/ M  P

. I3 e2 {) a. d; l* a. ?. H你第三步点去搵 7-12 边一粒???. Z9 u" S8 X( w0 u) I& H; ?, p

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問題第三步
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! h+ J) ~. y5 z. |( ~9 @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