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& R. t2 L3 A6 \* f' H% R
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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)。& y" R% N- K1 b  b: M- Z
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？』' u7 w% J( A; I% Z: Q. U' A& o

% K7 K" z5 Q: `) \# b. z8 h注意:
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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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2 U: @; _+ e/ I; A' z+ r& C2. 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: V; _. s2 Y" N5 f8 j) g9 |

3 D+ y% e4 B3 t[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:5 U' {- Q0 }) n4 k$ v$ i
相信e條題目都有吾少人玩...

+ h3 `. w$ H  B, d7 P我以前畫左個chart去答,
+ }3 m# r0 y% J5 |1 R7 s等我搵下仲在吾在: T, D! a9 S# d4 v7 q8 Y: T
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當日用左37分鐘答１２粒波子，差７分鐘才合格。6 B  M7 e% g% T8 q
13.........
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/ {9 y* s7 O0 U! H[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:. [  k7 }2 [* ~& B4 ^
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我以前畫左個chart去答,  |" y1 c+ t) x" M5 O; u
等我搵下...

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, R" i* P5 C# I3 N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:
; P8 j( G8 D' m: J/ ?3 ^) v唔識隱藏...已經諗到..

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' ~/ l- a5 r4 Esor !!!....e加改左
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5 a$ x/ @1 @( T# d  B2. 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4 o$ S" V( X& l6 r4 A' Y& w1 P

: q7 ?$ q* Q$ z4 h- e0 x[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: n2 L2 H# T4 ^4 o
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.' j) c/ W# |( O" P- [

' ]( G4 C( s: S* c2 kThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 `8 m( \9 G* K+ P9 _$ X1 v

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PlayPlay, Let me know later who has the right answer and I will add points accordingly./ }: [' j" J2 @. |

  ]% D9 v5 ^2 q5 A3 UThanks

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8 s. X% K# z. K9 y6 n2 X) ~不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 [. k& Z( x9 i% y9 b+ G+ L9 N8 Q1 _1-6 vs 7-12
: R7 a7 O& f5 u; w. o4 h/ Sif 1-6 = 7-12     13 is fake0 D, R9 h9 v- i  ^# w7 H( w0 h! {
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if not 0 `) A5 G0 y2 w! N7 H7 q

. i: k' z6 F- b) g, Q# O" IWeight the 2 time % B+ j/ ]6 c- t( r
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Suppose 1-6> 7-12( p7 Y( c& U' K  z- L1 \
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1-3 vs 4-6
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' R2 u6 y0 y: g, y* @Then Weight the Third
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  I% E, S: E4 PSuppose 4-6 > 1-3
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7 K, `' v' j* uJust like the first Step0 y# S6 P9 S1 f3 q

* I% c6 G" z% \( \: M4 vs 5 4 N! t7 l  X; t* U

1 J7 ]( r1 R' H1 b0 F! gif 4=5 6 is the fake one - F# r/ t1 d7 b; P9 F" W% U

; H, g5 m: [) z  r- w* Q7 Qif 4>5  4 is the fake one " E" _  b  K/ |/ ]( J3 f1 I

! P$ t3 ?' D+ }6 H! ~and so on......................

hello1997

分3組4隻波子秤
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* F# k- o% p& P" y/ zGroup A: 1,2,3,4
5 k8 N) t& z' ^' `5 F2 x5 tGroup B: 5,6,7,8  v4 ~  z9 N" z5 G6 H8 F5 X/ I8 a
Group C: 9,10,11,123 m- v) e+ j6 v/ M; r( {
Group D: 13
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$ n; w/ `% D0 q/ ]Round 12 k1 n, _, [) d$ y+ j) g/ }
Group A vs Group B
+ d/ K7 J1 S$ b! w; W! ~如A and B一樣, 即較輕一粒在Group C or D
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2 C- a- L2 \/ [/ D9 `" ]Round 29 X( V0 [* L& t- m
再在Group C拆成:
3 W& g/ r# S6 i/ u& CGroup Ca: 9,10/ f  p# U( N) t/ G. @8 P. U, K# E
Group Cb: 11,12- W6 q, h6 V  V
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, ' n; D5 m. W% J
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
) j0 \. g7 Z7 e; h; ?Round 1
3 P5 F$ Y6 y: \5 n; P1,2,3,4 vs 5,6,7,8 = equal
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Round 29 q/ j: X1 n9 R
9,10 vs 11,12 = 9,10 < 11,122 a8 D0 q2 J2 O. H  x8 B& I: ^
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Round 37 i  f% c2 w! C. u
9 vs 10 = 9 > 10
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- Q. s8 ?0 o! p/ x0 ^The answer is 10.
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- j' B0 b/ a0 |7 B  _e.g. #2 假設7為較輕的一粒0 C$ x4 t: `" Q/ |1 Q! y
Round 1
8 p# ]! x& h2 r( D2 u1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
( T- C- c7 e% h/ c1 p5,6 vs 7,8 = 5,6 > 7,8! m, C7 |4 _# i& U5 v
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Round 3
5 z! S0 }0 w9 g) B" r3 S7 vs 8 = 7 < 8
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% f1 b. u0 [/ f# kThe answer is 7.+ Y* G" s' L0 h

$ G6 q4 q7 L1 _% ze.g. #3 假設13為較輕的一粒) B% t0 g# i% H; t7 R9 h1 i" R! r5 y
Round 1
; V! b( n# F% n6 c' F4 g1,2,3,4 vs 5,6,7,8 = equal
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Round 2
, t! O* m' w0 o) i3 {9,10 vs 11,12 = equal4 o) M; K: d0 l) G3 |
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No Round 3
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The answer is 13.
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& Q" z3 b5 X8 u9 C, c1 x& G唔知我答得正唔正確呢?! ) X8 {( S* }: w: R- t1 d

; g* c) H, w; @2 [4 N$ a' R- J[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:9 W' T% k4 m3 V6 L
1.
3 y3 T7 B1 U/ G+ f5 E2 V% I' T# }1-6 vs 7-12
. C  A2 r) W8 wif 1-6 = 7-12     13 is fake- z3 ?: k0 O) _9 U2 M# U

0 U" V; B6 g+ Q) d4 ^& F% Cif not
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Weight the 2 time 1 ?; M% ]# P0 e0 c0 L8 q+ ?

0 {6 ~' i9 U: R1 D) u6 ZSuppose 1-6> 7-12
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1-3 vs 4-6 ' B6 I- d+ i  S- ]  n( o( N2 U

9 Y6 y% a9 ^6 A3 _Then Weight the Third
' p+ r8 q! K: r6 Q6 P$ @: z  t3.
# ^  D0 c5 b3 U- e, _! u1 v' d7 V4 p$ f* ?: p/ j& u
Suppose 4-6 > 1-3
5 U9 G2 [9 q( v# i, M: ^  a& }( a: @7 E. p& [: x5 T' X0 q
Just like the first Step5 L( M$ m8 l; z

8 C+ Z3 q* s$ j. Q& h/ o( v! e4 vs 5 4 M) j/ l- _# e) _4 ]7 Y

& d% O, N# k7 Z9 V  {; o, Jif 4=5 6 is the fake one ! H4 @0 c% }! }6 h, }
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if 4>5  4 is the fake one
: Q  @8 C) s+ s7 r( R5 h- vand so on......................

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問題第二步
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Weight 1:  1-6> 7-125 p& x$ M% M5 u; f+ |
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-65 o' w' b0 p3 `+ r

: r, t9 P! Z0 t" r+ h你第三步点去搵 7-12 边一粒???5 R) V3 I8 t1 V9 R5 X& ^, T
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問題第三步
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Weight 1:  1-6> 7-126 q; j. H* u& I3 [- X4 ?( d" U! i) j
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Weight 2:  4-6 > 1-3
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9 e* e+ F( N2 Z  Z2 s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