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) Y' G5 t% V" r

* h6 k, K. j4 ?7 @『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)。/ a3 ]( V' y; f/ M2 k' M
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？』0 X; B/ r$ H; y' i

! V1 J; g' K1 v. P) i+ f注意:
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" q, c5 k5 F3 {% m1. 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" X& R" z; G+ S/ B% ~+ B# V, t: u

, {0 B/ Z. Q' K, e6 f2. 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8 I8 R% _* ^! A( h; h2 `" s4 `

1 F6 Q8 F" t5 _  z1 g" a: Y, L[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:- q9 n# h7 B( m) M
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,
2 ~5 Y: g$ E( }; F/ 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。" p. R% O+ u) q& Z
13.........! R' [  C& z% V8 r9 u3 N0 H

$ y; x! V% h2 u# S' }) y3 {2 O8 B[ 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; p, J- p- A
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我以前畫左個chart去答,
5 d- {; o# Y* u, H- u7 |3 l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:5 l& `% N- z1 \( O* s: O2 p1 P
唔識隱藏...已經諗到..

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sor !!!....e加改左5 v" r7 z+ d+ L' |3 U" F: h

  L& q, f/ h3 F$ 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/ V, c- P2 T# i. c' D! y& M
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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:5 [. b6 {( a1 f$ ?* z. v
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.- g( v* l2 s5 }

! n2 ^8 U) E) F8 F. }# OThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:) }  ?; C" F- Z' t
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.4 J% h# W6 S, K+ x

& k! f1 V( p. B, bThanks

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$ g$ a% u( x3 B/ d8 @5 U0 j不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
: k+ t7 [0 ?$ x1-6 vs 7-12  r6 D* v0 J% P  {6 i# B2 {
if 1-6 = 7-12     13 is fake1 f6 ^  A4 c# @
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if not
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1 x5 ?% ~( Q. J% V+ zWeight the 2 time
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2 Y% g8 g0 Y& c3 `& s5 xSuppose 1-6> 7-120 z4 l: g1 J" x7 {1 Y

* G/ ^: s6 |* T  B! v# O1-3 vs 4-6 ; {9 s4 |/ Z- z
  G5 l" i5 @: C% a, z: M& [+ \5 h
Then Weight the Third0 m5 a2 e' s' n5 i
3.
2 f( h5 ^$ O+ _2 }
0 w4 N6 H7 h0 I- [  lSuppose 4-6 > 1-39 [' K; G% Z. p- T6 i
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Just like the first Step
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4 vs 5
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" m: G! B0 A9 \if 4=5 6 is the fake one ( D; ?# d6 i# B' }& p& H6 J0 N% b& [

) ^1 F# E! n- ~) aif 4>5  4 is the fake one
9 @0 n2 O7 w$ i" A4 _8 {2 W7 Z8 D/ M4 t5 b. q! ~+ x* m
and so on......................

hello1997

分3組4隻波子秤
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3 I! d3 t0 I6 Q8 T" Y3 o9 WGroup A: 1,2,3,47 ~) N- e+ u$ P8 `! K
Group B: 5,6,7,89 h4 T( x, c$ r) O( i
Group C: 9,10,11,12* h+ e( `, h) t' K
Group D: 13
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Round 1
$ `  Q" W7 ^( ~- w% C' N, X% ZGroup A vs Group B
9 G: O2 M) K# O0 s/ Q' G如A and B一樣, 即較輕一粒在Group C or D
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Round 2! o& x. Y; W# M( L/ Q" d
再在Group C拆成:
, B8 J$ l+ [. e- e  Q# T0 o* W. cGroup Ca: 9,10
  Y& i# I0 ^. vGroup Cb: 11,12
& M" Q* Y+ G$ F9 b4 x) w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, 1 p6 Z3 H+ t/ k; N! s) r( S
要再秤, Round 3, 之後便知答案.
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/ q# ~* {7 t; g. be.g. #1 假設10為較輕的一粒
! y+ q4 ^, C! \6 d% u' mRound 1" Q8 U# b  i* v
1,2,3,4 vs 5,6,7,8 = equal/ ^3 d, O8 v2 [/ w

* k5 l% p. J7 S2 e7 hRound 2
3 m6 k3 g4 o! Y: Z: O& z" p. E9,10 vs 11,12 = 9,10 < 11,12
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2 \0 a7 Y+ P+ J& m( X% L8 URound 3
/ |4 D- \' y$ a) I3 E% S9 vs 10 = 9 > 10
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The answer is 10.( a* G$ S( ?. F4 \; y: O

! K' `; ?3 g) f% fe.g. #2 假設7為較輕的一粒
/ `. r  [8 V) q5 ERound 1
6 t/ [. T6 T$ X+ P* y& J" B1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2$ E% b0 }) M/ `$ e+ O# `* S( d
5,6 vs 7,8 = 5,6 > 7,8
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. \0 l& N7 s) g) TRound 3( u7 c  G; n% J. c% v
7 vs 8 = 7 < 8
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The answer is 7.
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3 p* y7 m  c7 I. qe.g. #3 假設13為較輕的一粒+ p7 M: d0 H9 e$ H+ J* U
Round 1& E# V3 t  n8 N
1,2,3,4 vs 5,6,7,8 = equal9 a( z- r% \7 @3 @
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Round 2# a/ d& E! D2 U" O( G% v$ [8 D
9,10 vs 11,12 = equal2 k( a8 T5 t; b- m+ e# V. ~4 J( G

9 i$ i+ G5 e5 B: q4 m4 ~& c& x( SNo Round 3  l, m  t0 z) j! [' n) A

6 y0 o4 {, M6 o7 h/ G7 y1 o8 m' hThe answer is 13.( h" S; k4 f' [& Z1 u$ f
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唔知我答得正唔正確呢?!
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; ^. O2 i* }9 m1 Z3 `0 c[ 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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) N. B, {" \: |3 J0 Q3 d1-6 vs 7-12
7 m$ D% \) Z3 Q% iif 1-6 = 7-12     13 is fake
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4 N% Q3 Z  }3 O/ O% ?6 e, T8 w7 bif not 3 {% n; c. s; H( M: o0 y" b$ H

: R: Q- T* h/ Z# J' w; [Weight the 2 time
) x1 ?& e* W4 W6 L% O: ?7 {2 S# i
( p# ]/ K. \' l3 c1 c" BSuppose 1-6> 7-12( a) w" q" s; Z6 l1 n6 L. _6 n
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1-3 vs 4-6
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4 j$ e: J3 V) @6 }8 Z1 EThen Weight the Third
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3 h- Y; ^- Q* `$ c4 Q" rSuppose 4-6 > 1-3
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Just like the first Step) L" Y9 c* X* j  }/ {' M3 _# h
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4 vs 5
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6 C+ e! I" ~6 k5 aif 4=5 6 is the fake one
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* M+ P# T) ^" g$ bif 4>5  4 is the fake one 2 z" ?5 X8 f  P% W6 o
and so on......................

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( J! P$ G% i( m$ f& \2 F問題第二步
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Weight 1:  1-6> 7-12
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4 f5 u. y3 p: `9 TWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???% h- n5 G& t! o$ [

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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