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)。
, w* M$ L6 `- b4 }* M- h3 d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？』" M0 e- l: U8 R( Y  [+ d

3 j+ O8 Y& G9 A+ A. x* [0 e注意: ( l- S, @9 K$ }. f, x( d( d7 Y! u

, c+ {3 R% ~6 L& a1. 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  C7 Y4 p% t- h# U/ h/ V

5 E- g* J! O, f. z) F+ r3 P  l. |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3 x' O) w6 x3 ~4 h
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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:% q3 |5 G" C- o5 z1 w! j
相信e條題目都有吾少人玩...

1 p( @! f* \* L5 h! L; X我以前畫左個chart去答,
) Y9 C3 A2 b  a等我搵下仲在吾在  @0 O+ V9 v: H2 s# c

, T, B9 [  T* Y1 h" Q* X當日用左37分鐘答１２粒波子，差７分鐘才合格。4 T2 H. |8 }4 s) D
13.........
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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:8 p( h  Z' a- ]7 Y8 M: P
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我以前畫左個chart去答,% Y; m- M. E  `% }: @
等我搵下...

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0 ^* M; [+ K0 {( i* o9 X. `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:. E9 ?1 m+ j8 O
唔識隱藏...已經諗到..

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sor !!!....e加改左/ H& m. n, p6 X  s

0 t6 x5 ?  o. Z% [8 @  o! 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
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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 z: `9 ^. d) O1 l% K4 [3 K, ?
相信e條題目都有吾少人玩...

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  g" P2 F4 N# \  ?1 X; EPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ C2 Z* k0 U- g+ b3 r

3 O3 x* _( m0 M" sThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  B0 L" e2 w; ~( I$ q7 C, [

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% ]8 x# n6 W$ `! r- T9 y  hPlayPlay, Let me know later who has the right answer and I will add points accordingly." q. u8 z, T' b" C

# T6 D$ h# H( r, IThanks

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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.
$ z. B6 o' D4 p: v% G1-6 vs 7-12: x* B' x9 A6 `
if 1-6 = 7-12     13 is fake- I5 \; S+ }1 c$ U
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if not 3 H6 S  h& o2 q' G' Q& O- d

1 P; U" i1 C6 l) H( f( w- lWeight the 2 time - [, C0 \- ?( W9 C
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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 Third
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" l' U- R1 o0 f7 f* G8 b5 kSuppose 4-6 > 1-3
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" k0 n7 b' _  X. m8 s  {Just like the first Step9 p% d, A+ ?  A- G' j

& K/ W5 J1 S2 p/ x$ G4 vs 5
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2 E& W; `  g6 B5 q8 i. jif 4=5 6 is the fake one
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$ r5 l# M( L9 z$ Qif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
' x4 J4 [  ^5 rGroup B: 5,6,7,8: p7 y, B; ?. C1 ?
Group C: 9,10,11,12
! e4 o: r/ q) `! L( A; M/ CGroup D: 13& R- E9 A% k9 M6 Q. W# }

2 `: l& g3 f2 u+ K9 B; oRound 1: [: p, P0 G* m! H
Group A vs Group B
( g5 M0 B/ N' Q如A and B一樣, 即較輕一粒在Group C or D
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Round 2
4 b9 ~7 n( A. H& G. v2 h, g+ M再在Group C拆成:6 e5 }* r, l% g3 s. A0 G
Group Ca: 9,109 G# {, h9 ]. l
Group Cb: 11,12
7 [$ U+ e/ s  ~3 e然後再秤, 如一樣, 即13為較輕一粒.2 V% C# n* y  W
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如不同, 即較輕一組有一粒較輕波子在其中, 4 K+ [+ @- @$ p4 Y- N
要再秤, Round 3, 之後便知答案.+ h, b5 Q7 c2 Q1 `0 B) x

% ]) _$ _* ^- j- }9 Z4 [e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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" A( b- z0 k) U$ o0 \Round 2: t9 e! D2 v  l' S7 B
9,10 vs 11,12 = 9,10 < 11,12
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2 m* Y3 w. s! _0 g: x: t4 P7 ]5 uRound 3
4 w% H4 _3 d) z& s4 D9 vs 10 = 9 > 101 j; D  O  Y, h# D% O
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The answer is 10.
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e.g. #2 假設7為較輕的一粒/ @6 N; h; I2 m' _
Round 1! Y7 i) N( m4 r, q$ o9 Y8 T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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# I' G1 V5 Q& _- v, ZRound 2
$ N  v- M# Z6 X9 T$ F5,6 vs 7,8 = 5,6 > 7,8
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1 Q. f! e2 X2 q( l8 J' ^Round 3
. @+ }9 J' L. M# ]  a7 vs 8 = 7 < 8
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The answer is 7.& U& n+ D" h) y7 b# N# E

& w8 `1 C6 t, {: J; f  Ue.g. #3 假設13為較輕的一粒- Y7 t, k# g! @3 H0 A( c9 v: `' N
Round 1& e) x. ?" B5 D- P' d& o7 z5 @) L
1,2,3,4 vs 5,6,7,8 = equal' A0 D/ ]5 |- t& P' i; H
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Round 2
) J( {, b7 N& s) s4 q2 [9,10 vs 11,12 = equal
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  n4 k) R5 p0 j# _: v) ]$ Z, ONo Round 39 h1 G& |/ U% K& P
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The answer is 13.
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唔知我答得正唔正確呢?!
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, U+ n, y) w0 z! T0 {. P9 X[ 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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9 _& J$ S+ M2 ^/ b' F1 R1-6 vs 7-12$ u9 o6 E  i  |) X
if 1-6 = 7-12     13 is fake
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if not 5 V  x5 G* V, w  W5 U

: {0 t( U: [# A1 ~: ]1 k4 [: |; _Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 0 H" p1 k8 M4 L3 e& A) D

- F5 O3 g' A7 B  E* E! R$ G; LThen Weight the Third( I) v* t7 z2 q3 J  _
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Suppose 4-6 > 1-3
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Just like the first Step
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) @2 c$ U# h/ w, o/ W/ v4 vs 5
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$ ^. T7 G' i0 u& y$ a* Iif 4=5 6 is the fake one
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if 4>5  4 is the fake one # f5 N/ `2 o) C- b# t' i
and so on......................

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- T6 p% E' O3 M" ?9 m2 q問題第二步: G" R( T2 E9 O& l9 c0 H' a
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-66 _- Q9 h5 U0 t4 U

5 `2 j& j6 p5 z你第三步点去搵 7-12 边一粒???5 ^2 I$ A& O/ m: [0 F, y

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/ [/ _& `8 \+ T, \' e9 |. w1 [7 }7 Y問題第三步
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# u" l6 ]+ ~% a) c( ]  g: {1 wWeight 1:  1-6> 7-12
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. J( X  S  u& mWeight 2:  4-6 > 1-3 ! p( I; s" [: \' L0 _6 f

  a! B, r3 D. a, H9 `* k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