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)。$ X4 G9 K  z, x9 q9 w$ |8 \  V" `
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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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* K1 {& S. I9 E" R6 D% {9 H8 t

- M) F% C/ A' P+ \, A/ o2. 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/ Q6 M( E0 E" w; R
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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:: z/ d& C; h" j
相信e條題目都有吾少人玩...

" x& n$ R5 u2 J( o( h. H我以前畫左個chart去答,2 k1 `* {: b0 o$ G# M
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。
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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:
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我以前畫左個chart去答,
. W% K" [7 }7 M/ D$ m" v& p2 P2 Q+ B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:0 A/ q# q3 O6 w( u- d1 m* C
唔識隱藏...已經諗到..

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: J, k1 I6 Q1 r, ~1 B$ rsor !!!....e加改左; }! d* c% ~- f4 P" A/ R  y. A+ W- 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
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; B" B0 m! C) ~& M[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:# U: A  e6 ]; I, j0 p. d! M' a
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.* f3 `# P7 \8 P- ], {
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; F( Q1 M3 ^" j  i% R9 y6 l7 r6 b/ i, K
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0 @& O' [1 e! {, Z0 t, f# t" Z  ^PlayPlay, Let me know later who has the right answer and I will add points accordingly.7 _3 \/ Z2 E# L" ?( M* ~. m8 Q
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Thanks

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- u/ S% s! T1 X8 x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 7-124 K4 ^) U. {8 D1 g$ k- A
if 1-6 = 7-12     13 is fake; S( v8 d, w( T- @
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if not
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+ G# y* T( K) `5 [Weight the 2 time , b, m3 w9 @+ D" \

. o# J: A" n9 A. y. |+ B8 wSuppose 1-6> 7-12* k( j3 Q8 ^& ?) W! T
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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/ B/ W. y# I6 d9 R/ |Just like the first Step
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4 vs 5 4 j* k8 \: G7 k# v' l

- b  f- R& |: q6 z( E( Q/ cif 4=5 6 is the fake one , `5 S8 o# P, S9 V- s4 h
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if 4>5  4 is the fake one " h2 F' Z7 _' S
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and so on......................

hello1997

分3組4隻波子秤/ C5 D* |( ]0 P" E

: r& Q& ], d( \7 T$ `Group A: 1,2,3,4+ I( J! Q+ l" w  ~. H0 W6 r8 ^
Group B: 5,6,7,8' @7 V% I  p/ j$ h4 q/ ?  N
Group C: 9,10,11,125 e, H) a" q3 R) i3 ]7 ]% T
Group D: 13$ g; `& N# J6 z1 @
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Round 1. f5 }' j; v. V, n: H/ [
Group A vs Group B
) [& k9 v( H- o: N+ N. I) |如A and B一樣, 即較輕一粒在Group C or D
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- L* P) p4 o, i0 w" KRound 2
) V) E4 U- P" ?% x6 t3 Y再在Group C拆成:
$ w9 }5 l3 j" F& N& X. ^Group Ca: 9,10
4 G! ]. {- a- n8 KGroup Cb: 11,12; l4 Q( \+ L/ q% J9 T8 W! ]% w1 U
然後再秤, 如一樣, 即13為較輕一粒.- Y4 G* d6 i2 Z6 w
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如不同, 即較輕一組有一粒較輕波子在其中, - @# G1 w) q" T3 d/ o, |4 W: |
要再秤, Round 3, 之後便知答案.
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# F" o5 C& C, t/ n  }4 Xe.g. #1 假設10為較輕的一粒
4 x- z1 v6 Q1 q' K2 B0 Z% YRound 1: Z0 W; h6 X/ R, T5 }
1,2,3,4 vs 5,6,7,8 = equal: s+ b5 i1 i" Z* o( `
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Round 2
6 y8 u5 v( Q* S; h9,10 vs 11,12 = 9,10 < 11,127 e6 |$ B' l2 j1 W' I

; p/ [2 O$ c  b9 ]! z! ORound 3
) S/ n8 J3 U. e. y. |- Z( }9 vs 10 = 9 > 10
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1 Y1 _2 f. G: v4 @The answer is 10.
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e.g. #2 假設7為較輕的一粒2 H( M9 B! q; s0 i% B' N
Round 1
1 K# w% Y! R# e2 q7 i' e1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& i, d7 P7 Y6 F

% D5 W2 y; m1 g  aRound 2: g; y  F) b) ]9 x0 |) N4 D% I
5,6 vs 7,8 = 5,6 > 7,8
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Round 32 k6 R. b0 B/ V
7 vs 8 = 7 < 8
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The answer is 7.6 o/ d7 |+ c. i7 b$ ^. t

5 y1 u- {4 V) {% ]e.g. #3 假設13為較輕的一粒0 q( G5 Z; [  H  o! \% Z4 K
Round 1, z, O1 z7 x9 Q5 B2 d7 }
1,2,3,4 vs 5,6,7,8 = equal
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Round 26 z2 ?! t# w7 M4 S/ R
9,10 vs 11,12 = equal* t  w2 J2 u& H) J' ~8 ]6 x

  t1 e' ?" w- b" U# WNo Round 3
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: i% [0 b6 c' L- W6 bThe answer is 13.* ~. t$ D: r3 f' E; O7 {

/ a* H, w" F2 Y! R! 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:) j" V  A' {2 `- R9 a9 H
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1-6 vs 7-12( B9 K0 w/ a  ?! f/ S
if 1-6 = 7-12     13 is fake7 i: a; x9 u1 F  _" f1 d$ _2 g
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if not / J  l! ~5 c5 B3 U: n
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Weight the 2 time 2 p5 k  @/ A- R2 m* X
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third2 J  }9 P4 u+ {; j# {
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% f5 o9 W: `! B: {- }* T$ O2 r: wSuppose 4-6 > 1-39 B* ~" O3 J+ Z. ~6 g
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Just like the first Step( j7 p/ Y% ]4 v5 B' j
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4 vs 5
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if 4=5 6 is the fake one
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4 O! A6 U, l$ Rif 4>5  4 is the fake one ( f0 I" x* D' b2 u7 y
and so on......................

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; [4 S; z! t" v2 z4 ^問題第二步
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7 p9 X5 j$ F4 b. Y, d6 }8 lWeight 1:  1-6> 7-12
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* |0 C& C" u' g- O$ m) WWeight 2:  1-3 vs 4-6 , if 1-3 = 4-62 o. u% g- C1 v3 S2 m2 F
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你第三步点去搵 7-12 边一粒???
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問題第三步! x# M$ k+ d( P; [: s

! V& y0 a' {8 Y! p8 S* YWeight 1:  1-6> 7-12, Q! t& l% T* A! S$ A, T
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Weight 2:  4-6 > 1-3
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  ?: \7 j- }) n$ Z7 [# G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