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7 O5 R7 x. x% [; B/ X6 \
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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)。3 \: w9 u+ u, O
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？』+ }& i4 j/ Y( g0 t3 D8 C7 k

" H6 c2 B" h& O- j) p/ ^3 P7 U注意:
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" ]+ i- V1 q( ^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/ ]6 T7 w* a. M- v( U3 G( @7 @
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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 21:34:9 k  n5 w* ?6 _0 {9 W
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,. O8 j, Q. k  K% _- ]% K
等我搵下仲在吾在1 k9 O7 F# t8 t5 X$ M  g2 V

9 S8 S1 r- I! Z6 V$ S3 b* L& l當日用左37分鐘答１２粒波子，差７分鐘才合格。) J& D4 u; i$ b+ n. y, ~
13.......... s; P( N' \4 e# Z
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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,
( m1 Z2 @$ _! G/ M% r: |  ~等我搵下...

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$ c) ?5 J2 Y# A5 m6 {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:
7 \$ M& b5 c# G+ y唔識隱藏...已經諗到..

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; K0 a, j3 ]: \( i# g2 j. esor !!!....e加改左: Y$ L3 i' b6 M! }: g$ E; p
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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# F" G, s# R0 [
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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:
2 F' _3 g6 ?# B" [+ D相信e條題目都有吾少人玩...

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: U' L9 ^9 H* j2 }, F) rPlayPlay, Let me know later who has the right answer and I will add points accordingly.9 |, P: i4 E- ^0 s2 I- z, K. ^

+ Q7 }% s' v% ]9 p! _Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: Y, a* m; }  j. L4 x, E1 y

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; P) v& R& N- d; }! aPlayPlay, Let me know later who has the right answer and I will add points accordingly.. G7 O" [( N; X$ e

3 T' B) N! j8 O( x& TThanks

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7 O; `* N% \' ^& b# N; M$ t' t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
" q6 Z9 T7 M1 T: g4 b4 Y( Kif 1-6 = 7-12     13 is fake
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Weight the 2 time
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" x: x$ ]5 i; E, y* P: d: ASuppose 1-6> 7-12" H- v6 k8 v! O  l$ S- F- H- C

0 O" h5 P  f# \1-3 vs 4-6 9 O8 b! l' ?9 t: `6 f
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Then Weight the Third* I' x$ ~' H, L+ B0 E) u: C/ z
3.
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Suppose 4-6 > 1-3
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0 o; K: m. [- c$ UJust like the first Step
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4 ^; i; e6 h1 g; c7 Z. m4 vs 5 % t4 @7 J$ V# b" x( @. u+ J& D  P: M

! q! e' s; K. yif 4=5 6 is the fake one
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if 4>5  4 is the fake one + \# V7 m  t: H; _* ~% c; q7 F$ [
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and so on......................

hello1997

分3組4隻波子秤( O1 j; x6 _4 [7 k

* C* e- x% I5 g0 GGroup A: 1,2,3,4
- w- k- W; U* x0 W2 ~Group B: 5,6,7,84 D( }6 Z3 u8 @9 f
Group C: 9,10,11,12
0 j+ I: X/ F! p* u9 FGroup D: 13
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9 ]% v2 U5 P6 t7 r* \Round 1
. ]) t* d. u8 C0 \! N  WGroup A vs Group B) m( L! i, ]+ l2 z4 d
如A and B一樣, 即較輕一粒在Group C or D9 t+ K8 ^7 y5 P3 v
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Round 26 N: R" B* T: t: A+ ~; P1 _
再在Group C拆成:
. e$ O, l2 M& P# z* AGroup Ca: 9,105 }$ ~: q& y- q  Q
Group Cb: 11,12
+ ~) Q1 N6 h3 A然後再秤, 如一樣, 即13為較輕一粒.) K; k6 R" f8 f4 W0 R  R+ v4 C8 @

( W; {; l# {: r/ @! N) Y: d如不同, 即較輕一組有一粒較輕波子在其中, - }& U, P$ z8 Y# K
要再秤, Round 3, 之後便知答案.
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2 E7 }! M; C5 m$ ]e.g. #1 假設10為較輕的一粒0 V$ @$ t8 z7 O. H* s
Round 1
7 g7 T2 v& T2 |& {: T. y1,2,3,4 vs 5,6,7,8 = equal( `, k4 ], z7 }! K

5 x- M& B: ~- y% S+ lRound 26 M3 \, Y  X$ |, R" u/ R) `
9,10 vs 11,12 = 9,10 < 11,12
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. [5 E9 l5 s& D3 l/ R* P- ?3 SRound 3
; l4 k4 ?- Y( P/ b, y9 vs 10 = 9 > 10# y2 S; k# |) @  C* X3 z+ I
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The answer is 10., ?  N+ _6 S4 `$ V1 n) F
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e.g. #2 假設7為較輕的一粒
1 o& y/ h5 F* p( ZRound 1
" g1 B4 L2 d. d$ b! r2 ^" ]( U1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 p0 R) y% Q; V, `

  h  F1 x' e' H, p* fRound 2
+ N" m: t# ^4 _7 j& @% M5,6 vs 7,8 = 5,6 > 7,8
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Round 3
) M, S" H( l& q# l0 n6 X0 ^7 vs 8 = 7 < 8
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+ y$ B6 T& b* W, I6 E4 X, [3 m3 p$ A$ H" OThe answer is 7.
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- i$ G  S8 F# C2 ze.g. #3 假設13為較輕的一粒2 O8 y% T: v& ]$ J2 W$ l
Round 1
, h7 m. s5 h: `9 W# `( z1 c1,2,3,4 vs 5,6,7,8 = equal
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Round 29 Z/ L: q6 k6 d+ R) Z2 Z. n5 E
9,10 vs 11,12 = equal
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No Round 3! L8 W5 M3 g" s( O, h, T/ C
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The answer is 13.2 r8 [- b3 H& j  ?, L4 p

) ^8 e; D7 ^8 C5 [唔知我答得正唔正確呢?! / {1 V$ M9 b# I

9 m" l8 ~8 N9 s[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:) P6 M- z0 o+ w* G
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1-6 vs 7-12
; E% w1 N/ h% ]9 cif 1-6 = 7-12     13 is fake! D0 ~# W9 v2 z9 E; y7 N
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if not : `5 ?$ f8 }% a& v
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Weight the 2 time
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Suppose 1-6> 7-12  Q5 u' Q4 Y8 w3 U% {1 I  q

9 f  g* P+ `7 @( F$ K8 R- ~1-3 vs 4-6 , e' N* A6 m+ i( E) p' o( `) K& \

; k  w  N* l. V8 e8 Q' N! VThen Weight the Third
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3 P3 @+ X8 @' ~# ]- A1 Y6 ?Suppose 4-6 > 1-3* g+ I, J' x% m! E4 i2 W9 R' t

1 W  j4 C3 ^- lJust like the first Step: _/ D4 a# {6 S- f
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4 vs 5
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, U/ A. k8 r, ~6 p" Qif 4=5 6 is the fake one : N5 [7 y, Z# o- d- |

2 u6 b) _+ E; Lif 4>5  4 is the fake one + F' w1 V/ k4 P& t' o
and so on......................

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& B& {1 U8 z- k& ]1 b) x' m問題第二步
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0 V- I9 W$ e" W; sWeight 1:  1-6> 7-12( r9 Z( A# S3 A0 D2 i* K) p' F

  }2 _/ `- N' {! }% n2 ?Weight 2:  1-3 vs 4-6 , if 1-3 = 4-67 Z/ `$ L/ T" G" i% K$ ?' M# k

8 {+ \/ C: L5 W2 m# D0 `1 {5 C你第三步点去搵 7-12 边一粒???# Q' [  t! p$ t! t$ f

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問題第三步
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2 @& Z" R; \+ |: X: qWeight 1:  1-6> 7-12# V" @( w2 ]. i$ C7 a

0 V" ~# [$ W' m, \& N0 |7 qWeight 2:  4-6 > 1-3 + g7 M4 d1 T! Z( b0 ?* o

1 q( c* N9 A4 C  P) S+ Q$ w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