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 n" ^/ s1 C: ~( Q

' D1 r) j6 R' U- ~( }- [  j『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)。7 G4 }) A- t) 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？』5 f/ q) |1 E7 y/ _1 e1 ]! v! [! D7 M

& y$ F0 E" F; @6 e8 d注意: ; Y* k9 h' n. \9 E: g
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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/ g+ v$ x' L' M3 @6 u0 M( C6 q1 k

; t: d$ F: r4 H# U7 e% e# n6 [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# E+ F& G* f: n( v5 l

, C( _" E% L5 W! M1 }$ \5 e[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 R- Z) z2 a% Q8 |6 Q6 v# a! r相信e條題目都有吾少人玩...

# K1 X! L& U1 Z9 x  U2 Z我以前畫左個chart去答,
) T9 r5 f6 L- h等我搵下仲在吾在1 X* b/ `/ [' Y" e7 E  R! f
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當日用左37分鐘答１２粒波子，差７分鐘才合格。; o; B& ^4 |* R
13.........- a5 G. m+ Q0 N6 [
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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:& h7 }% d& L  }' f7 r" B' L

0 [" }8 o4 }  B& W& M. C我以前畫左個chart去答,
4 z7 s6 h( O- G8 x等我搵下...

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& u  |6 s( \& g. Q; s  R5 W/ K% M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 `. s/ m4 n9 p& E7 `) {: [
唔識隱藏...已經諗到..

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; n4 T$ p$ D$ l% c" K0 S2 l; Psor !!!....e加改左
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9 o! }: ?3 _' r' M( u2 z. w2. 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:* E8 _' s( H: l7 X5 X3 c& u* q; 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.
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6 G+ C) C# }4 w( z4 A4 bThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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' Q' `; \, p0 uThanks

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1 ^0 ~! k/ t* ?不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.2 l7 b4 y% J, f$ Z* V. R
1-6 vs 7-12
6 n+ q, X5 f7 ]( ?+ iif 1-6 = 7-12     13 is fake
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3 R' V0 J1 s+ {4 s0 [- c+ }Weight the 2 time
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Suppose 1-6> 7-122 l( m, T9 P4 {; o7 u

5 @6 A# M2 [4 o$ t$ }+ D3 r1-3 vs 4-6 . K1 F9 e6 ~" |7 t% n" I

$ e2 G8 @! I3 L7 P! s( Z% c, q8 G! E& eThen Weight the Third
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Suppose 4-6 > 1-3" L& }4 j3 p6 ]& r
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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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
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( P) G  Y& s$ T9 J% j8 U$ NGroup A: 1,2,3,4
0 I! p* U5 [3 N, i- d5 uGroup B: 5,6,7,8! h  J, I) o" q# l$ F
Group C: 9,10,11,12
# `0 Z( n. [! r& j  U. K# A! CGroup D: 13: y: N3 w1 ~' r( i# a8 D0 ~
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Round 16 v& s& l9 H1 T; T
Group A vs Group B
; r6 y/ E* D* b9 {$ V% U" D! O6 U$ i/ }如A and B一樣, 即較輕一粒在Group C or D5 ]- H! t$ S1 G  c3 i; H# T, ]

5 K) x/ E1 T4 ^5 s: d; WRound 2
9 U# B, p' U0 ~1 J, L0 W再在Group C拆成:9 S9 Y' O. }' j, b) t* I
Group Ca: 9,10. V& f& T/ g# q4 g3 i, B* t: {2 X
Group Cb: 11,12# t' o6 ~6 |6 G/ ~$ d/ R
然後再秤, 如一樣, 即13為較輕一粒.0 ?+ u+ y1 w3 o7 N+ l) i
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如不同, 即較輕一組有一粒較輕波子在其中,
* u% A6 @. E7 j$ B& Z要再秤, Round 3, 之後便知答案.+ A4 V, R' Q$ }8 u
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e.g. #1 假設10為較輕的一粒
$ [/ j$ w9 ?; p' g7 bRound 1
' `7 x, D: f6 l7 {9 |1,2,3,4 vs 5,6,7,8 = equal
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Round 2
- D7 ?  C) N! k9,10 vs 11,12 = 9,10 < 11,120 b( C3 T- C! v% L2 x/ M

" [+ }( ~5 |" t: w) eRound 37 y3 r# O6 I: I& H( n2 q
9 vs 10 = 9 > 105 y; ]! r* i' L  L

/ P9 [9 X: ^( `4 H/ Y6 B- u0 N  IThe answer is 10.8 }/ d8 B" x( \& \6 w: W

. u3 V7 e2 k2 [# V, M7 ]! ye.g. #2 假設7為較輕的一粒
, E( X$ g( \  |$ wRound 1: W# r7 a! ?. ^# w
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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( Q+ a* h  w. X1 B* ]Round 2
. \4 o+ F1 z, f' b7 X' x. K6 U- q5,6 vs 7,8 = 5,6 > 7,8
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! Q! d7 R3 Y3 `( Q) {% v2 S, v$ V. P( sRound 3
& ~( V: t2 `# U7 g0 L7 vs 8 = 7 < 8
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. |; @; H) L% `+ Q. s% `The answer is 7.
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e.g. #3 假設13為較輕的一粒
$ S  H& z+ @, N$ r  QRound 15 T: X% N, w' i+ y0 |% J
1,2,3,4 vs 5,6,7,8 = equal
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" P0 k6 m# t  k5 f% mRound 2: I6 f' M7 S  K4 L
9,10 vs 11,12 = equal
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No Round 3+ x  _7 q. l: G. @

8 Y, z$ j, [8 {9 J/ V, j( ^The answer is 13.
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唔知我答得正唔正確呢?!
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" ]) I. u6 b6 o[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:! O- S$ e0 O' O3 n2 T9 j& K/ i+ s; @
1.
+ ]; F/ ?' @* y3 C$ S1-6 vs 7-12) ^6 V3 z1 c1 h$ D
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12" z' n( M8 g8 P5 ~) u# V

8 z( k5 C4 V" i. \! i3 {5 ]8 @1-3 vs 4-6
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Then Weight the Third5 X) {- o) u% D
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, I# J5 Y- K; [- _Suppose 4-6 > 1-3
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) z2 F& g& {- k3 YJust like the first Step
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& ?' L+ m6 I" y# K( ^4 vs 5
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5 D2 R, @" Y7 [0 G8 i8 eif 4=5 6 is the fake one & H& d5 f: s) p% z

. w0 {; M+ O: t( H4 tif 4>5  4 is the fake one
, {1 ]0 R6 s$ N& O% E' ]' @and so on......................

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問題第二步% f  u0 _) f' {. Y* d

4 q, F- B5 V2 M! E: |5 k0 A4 hWeight 1:  1-6> 7-12: v6 y( u! W) |+ c

6 u$ N; F2 Q) _Weight 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???
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2 q& x: z5 g: {5 u========================================( A8 _' R$ L/ f% S6 n# h) k) [

2 p8 y2 }+ P( V: O問題第三步( v) r4 Q- H1 X  [
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Weight 1:  1-6> 7-126 g0 b2 \% u5 I2 O/ m
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Weight 2:  4-6 > 1-3 1 V2 g  T4 I! T& |  B/ @2 U
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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