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) @% c* H8 |( k* u0 d7 e  u7 Y2 R9 z% s

5 P( D0 e3 O3 S( P( t! O『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)。) Q! D3 t+ t( b: c7 A1 \
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？』. J5 ]* Y6 K0 O, G0 a3 ^& a

* F& M, g9 l3 V7 x; ^注意: 7 M5 @" @0 p8 H. O" P  O
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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
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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:
& }# d1 x  z; \7 S9 s相信e條題目都有吾少人玩...

/ V6 E6 r% M" f1 }2 Z我以前畫左個chart去答,
6 N# |' O4 N4 G. I等我搵下仲在吾在; m4 Q: t# q5 ?

4 O) n- r/ S% r/ u% X當日用左37分鐘答１２粒波子，差７分鐘才合格。9 A5 z4 K8 e! Y. d& s
13.......... l, u6 \! j% }% C

. N  k( Y$ U, C; T[ 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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8 @* T/ p1 j. g+ G8 h* s" O4 |1 i我以前畫左個chart去答,
/ b5 V- K" `3 O7 F5 N( R) K% {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:
; W  c( M7 q/ o! L唔識隱藏...已經諗到..

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1 s" {5 ?/ |& _; lsor !!!....e加改左
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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' A; L) s9 F6 k0 Z: j# o+ 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:( e8 ?# g  m$ y6 p) r) M/ f' A: s
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:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly." V( S( h  }$ m$ I/ ~+ S0 h4 j

  O4 I$ ^/ `1 ]  pThanks

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( \4 ~5 K" p4 w: D7 L0 {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! ~. l6 {* {& z6 G" _8 W% f; f
if 1-6 = 7-12     13 is fake- d5 K8 F: E0 c: s0 ]7 @$ |- C

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Weight the 2 time $ G) _0 p- a4 R. H9 C
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Suppose 1-6> 7-12% v5 Y9 J6 P: r8 s. s; }, b

% _- Y' K7 n- p/ w1 m! h1-3 vs 4-6
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Then Weight the Third9 i, {/ [( |: v7 ^: s2 {3 W; V0 P& U$ L
3.9 m3 i8 ]0 G4 }: N) ]! t
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Suppose 4-6 > 1-3& {) A" v* c# I; @4 I# @* _9 e

: z! _# {, Y, q2 T- W; TJust like the first Step( p1 k* K8 h' l3 u
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
9 Y2 _! Q" I! g1 a4 d
* d* v7 `9 Z* Zand so on......................

hello1997

分3組4隻波子秤  a# |  }. G. l4 w1 \! g& h5 h$ a; H

/ J4 G' f- n7 w% Z) tGroup A: 1,2,3,4
" \5 j3 e4 Z% \( q$ }Group B: 5,6,7,8: D' E2 E  |+ r2 u& ~' U0 g
Group C: 9,10,11,12% }" V& B1 {# C9 c7 ?& s5 Y' I
Group D: 13
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Round 19 y2 t( e& b# o7 k6 B
Group A vs Group B
5 ~" I4 q( ]6 D  H; I4 k如A and B一樣, 即較輕一粒在Group C or D
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Round 2
& @1 ]$ z" o, T7 P& K8 k再在Group C拆成:
: `0 T& x; ^: M. V) y( cGroup Ca: 9,104 s8 o& L5 }8 k' A, V2 t2 f
Group Cb: 11,123 A& p3 F, L; }
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
! B$ |1 ^" C! D* c0 Y  }要再秤, Round 3, 之後便知答案.6 U: X" z' t$ F: n8 p

6 ?: i- l+ d+ ~: I4 c& @e.g. #1 假設10為較輕的一粒
% h/ K8 I8 j' ]9 r! URound 1
5 b6 W0 Z. }/ n5 w$ x2 w, k: T1,2,3,4 vs 5,6,7,8 = equal
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! n. a6 {7 z( F3 I( k& C* SRound 2
& s. }4 b% |0 B$ O9,10 vs 11,12 = 9,10 < 11,12  x, C- e: g2 A) Z. A

7 F! x1 e! e! ?7 URound 3
$ T- v% c% s! L0 G/ @& e% w  T, w9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
, ?; B2 l# ~' V' W# vRound 18 v/ k) G7 k0 H
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8- T7 X2 p1 B5 T! L! a& D1 q0 H

6 m% q3 V+ _5 B/ C+ q3 J/ S7 Z$ qRound 20 {; p+ p( P$ Z# y8 z* F" }, Q
5,6 vs 7,8 = 5,6 > 7,8
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7 \' ]. k3 w' P- F% o4 mRound 3  Y, v) U) K& z* c) _6 L4 v' Y
7 vs 8 = 7 < 8) q( |# u# {& e

$ p% C3 ?# k' P: c( PThe answer is 7.
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% g7 a2 n7 X, k. L3 K; Le.g. #3 假設13為較輕的一粒( [, j0 p4 ~% ~
Round 1! L; \  a# X* n, X, l8 E9 z
1,2,3,4 vs 5,6,7,8 = equal0 q1 I6 A- ^5 v7 s2 r
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Round 2
, h; `4 t6 @! X1 K% f/ t9,10 vs 11,12 = equal
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No Round 3: R" h7 D! T. u3 K* [

2 h" D, G6 _& h( m8 \The answer is 13.
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唔知我答得正唔正確呢?! : Q: ]1 w" V/ M: M6 b

0 L2 X+ o9 K2 s$ {$ H( t6 I[ 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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1-6 vs 7-12
( d9 {; m' K5 y7 X, h& ~4 rif 1-6 = 7-12     13 is fake
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; X4 u) K. s( V: u: Dif not 8 k, D6 D5 p. N4 f* I2 T$ J) g8 w5 @

( g* k7 P: O# ]0 gWeight the 2 time
* B3 b4 t" x& U! i, z5 p& e. S2 M0 t8 b5 W% b( P: w% N$ C
Suppose 1-6> 7-12" Q3 G5 B4 d: t
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1-3 vs 4-6 - I7 m8 C  X+ @1 c3 ?1 G( b/ B
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Then Weight the Third5 ?/ a; b! V, C  X' N5 }
3.
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Suppose 4-6 > 1-32 m5 q5 z0 F7 ~: L' }& G

! K  d+ F7 Z2 M4 IJust like the first Step8 D* X; S5 {( v1 i) l: n3 a6 }# e# P# h
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4 vs 5 * Y* J) g3 H# W0 e
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if 4=5 6 is the fake one
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3 W: S7 r: v7 {; Z, B8 cif 4>5  4 is the fake one
1 o, e5 W' R; u* L/ [# N5 O$ aand so on......................

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) h& M2 F1 V. s+ b1 O! F問題第二步: A4 ~6 c  V5 P5 C' ]
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Weight 1:  1-6> 7-12
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0 \; K0 B8 G/ |) f9 ]6 a2 \. [Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6( S0 r; U) Q6 [* @% A
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你第三步点去搵 7-12 边一粒???, w2 a  g: F9 F+ n# u4 y7 Y
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========================================
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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