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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7 j; Z2 D; {* M! z『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)。! n$ y9 a! o: y& N' j
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: 5 T4 x: t) A1 {; g/ c
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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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, d7 i- v. Y6 ^# m8 {: ~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+ N2 Z1 E$ J! ^% a

0 y" M1 e# G2 i& l  W! Y8 Z# s[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
; _4 i9 n+ c1 H6 w. u& M# V' L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,' {: `! z4 }. O8 Z! H# Q5 G
等我搵下仲在吾在+ D. @( M) c( ~8 o
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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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. G4 B( a. k) V* Y+ i[ 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 J4 Y! ^0 N( f5 a$ h
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我以前畫左個chart去答,1 {& w8 \3 R" B+ a& ~8 F0 i
等我搵下...

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, ~6 ?4 i. s; G) k1 L9 x( S5 o, E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:1 h3 t3 L3 _' D  n9 i  O
唔識隱藏...已經諗到..

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sor !!!....e加改左
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- y! g& T8 \: X2 d: H) 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
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9 ?$ q9 W: F5 R- h[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
: T" D. i$ ^) @& g3 I4 n1 A' B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.3 O6 `/ M$ ]" M. R
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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' m6 \3 x) V: WPlayPlay, Let me know later who has the right answer and I will add points accordingly.9 E% O+ e/ m, R  @
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Thanks

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/ M8 f4 X* ~6 T5 M! ^/ T0 |' _不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
! I) I- ]  {! W" o8 O# H* n$ }1-6 vs 7-12
; k. x' @' E% ]) b; ]9 F$ ^if 1-6 = 7-12     13 is fake
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if not
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* q7 x2 h: O. L4 |Weight the 2 time
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0 `3 Q  N8 s  d5 H9 W6 y* t0 sSuppose 1-6> 7-12- Z  F) n4 }/ }. k* w, I

# o; t% g% Z2 P1 ]4 w  [5 C1-3 vs 4-6
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9 t3 d, p1 d: u& @Then Weight the Third; i' Y1 m7 i2 T3 ?- K& m
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Suppose 4-6 > 1-3
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1 g/ \  g" h8 b5 J9 g  k/ R6 bJust like the first Step! J& I/ V' ^! M8 |

# ~" l6 D7 S/ w2 I, ^4 vs 5 ' E4 P$ `1 ^5 T% T

+ g, L: G' Y5 x. |7 Eif 4=5 6 is the fake one ' Y3 W. l7 _1 ?3 b+ _  Y: `
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤( F# s! o' Z! }! a9 ?( d
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Group A: 1,2,3,4# O  g8 }* o; E1 f4 E0 H/ r
Group B: 5,6,7,8: Y2 J& @6 h: T/ g% F' c: e
Group C: 9,10,11,124 Y' u/ i; h: a5 v- l
Group D: 13# s/ ^% V- w9 }, Z0 Q. m

8 _) K4 V4 b" [! o- v  _Round 1
7 Y, n3 [8 m! h. U1 ?% ^* u- N: L% q" F0 UGroup A vs Group B
2 M" H$ `1 @  i+ r- W8 |8 T$ N如A and B一樣, 即較輕一粒在Group C or D0 r* l8 E( O& ~$ o6 A
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Round 2
2 z; r% g/ y6 m1 i0 d  j再在Group C拆成:+ C+ N) h3 X8 U4 P
Group Ca: 9,10& ?( t, }# O. {8 g
Group Cb: 11,12
! e9 `2 ^6 f5 C, p  Z8 _然後再秤, 如一樣, 即13為較輕一粒.& Z& \9 p, F5 J3 R3 L
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如不同, 即較輕一組有一粒較輕波子在其中,
7 d1 b% q: g5 ^4 o' F" Z1 V$ H, i0 G* l要再秤, Round 3, 之後便知答案.
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9 q1 p7 u/ F# v7 l; l+ ^e.g. #1 假設10為較輕的一粒6 U# Q9 m0 Y' I7 c
Round 1* o4 S1 u8 t, `3 V6 i3 D' N
1,2,3,4 vs 5,6,7,8 = equal
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2 e$ V' Z& }! r6 bRound 2' O& {: v. O- P; S) ~
9,10 vs 11,12 = 9,10 < 11,12) m1 c2 q6 R% d8 E/ q' A4 F

4 w% C" x: n; [5 Z4 `Round 30 k5 y8 B. X) T# M
9 vs 10 = 9 > 10
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. R4 P6 |8 ^+ S! R. OThe answer is 10.; Z# s& _3 J4 p# I9 I$ u

* l+ ?/ G/ z7 {. Ne.g. #2 假設7為較輕的一粒
% f5 C/ O( v1 ^+ [8 A+ iRound 10 I+ w  M) v3 n0 v
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# K% [2 Q$ p. C4 @4 T7 g

$ g1 c: `5 j8 [! a2 T5 HRound 26 P+ y7 V: c- S& n
5,6 vs 7,8 = 5,6 > 7,8) E7 s( U) m+ V  e6 A, ~. x

5 ~4 l4 w: J% _. @6 u4 DRound 3
% a( x" ?% u# X& W& F+ P, e7 vs 8 = 7 < 8; d1 ]! ]/ W8 q! g$ g3 `+ I

: E1 _" w6 M6 ~5 j, q5 e% GThe answer is 7.( c6 A6 _# `/ h5 g' Y' f

% I8 |5 [5 B# c  s# A0 k; ge.g. #3 假設13為較輕的一粒3 s. s' ?% g% @3 B
Round 1
, V& _  l1 @! a1 B( T& P7 V1,2,3,4 vs 5,6,7,8 = equal2 \! v1 a( Y  u
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Round 2
6 H3 M( X9 j1 T1 |# ~( w9,10 vs 11,12 = equal4 P* n9 E# ^1 h
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No Round 3
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The answer is 13.+ B- A3 j; C  s1 W

4 a% v( p3 ]3 `' j' D0 h唔知我答得正唔正確呢?! 0 R; g: X: F6 R  L6 W

6 w9 c* G, ~* g  N  v5 r[ 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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6 \9 f* t4 ?, u; l2 F) y! g1-6 vs 7-12
/ m5 k; B8 ~8 e6 eif 1-6 = 7-12     13 is fake
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Weight the 2 time $ s+ k  |' U+ ]0 R3 G8 `
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Suppose 1-6> 7-12
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  {7 d1 Y  ?' Z2 r1-3 vs 4-6
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Then Weight the Third# ~! W* d- D2 J5 B( F7 b( o
3.
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2 g1 P! y+ }$ |- t% Q1 }1 VSuppose 4-6 > 1-3! c) ~! z  `2 s) Y( U; u
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Just like the first Step
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% a6 K* b" T! H9 e! u+ e! ]0 s) bif 4=5 6 is the fake one
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if 4>5  4 is the fake one : Z" I, R  B5 X2 N; C
and so on......................

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* w. h5 K$ F+ z- [問題第二步
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Weight 1:  1-6> 7-12
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) M$ P& @  |) t9 O& MWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6- t: [8 |, \- }; _8 p/ g

( X  N& M, z# ]% b9 X) y" ]你第三步点去搵 7-12 边一粒???0 T4 B. H7 f% u+ u1 j3 a
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========================================
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# P* x2 x0 ]4 D8 u問題第三步( y% }+ H$ K+ R: c. x; R8 u
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Weight 1:  1-6> 7-12
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- |1 W) }4 {; u$ y) ^: tWeight 2:  4-6 > 1-3 $ y  x) G. O, N. u

+ `7 b4 d7 A$ _. B5 P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