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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+ t/ V1 b, \, ^『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)。
! v* _8 p# S  `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？』  X) l) Y% L( i. {
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注意:
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- i: r% W! u( _! ~) M1. 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; e# `  i/ v* B$ K% }

$ @, e- w7 E, y2 H. d  c) a! Q2. 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, b3 w2 O9 B! _4 g
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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:
- Q2 h- }! i1 K: `7 [' Q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,3 K: `" o) G* s+ u
等我搵下仲在吾在/ e+ a( p, e+ o3 T+ q0 q
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當日用左37分鐘答１２粒波子，差７分鐘才合格。# y9 z5 v0 ?/ w# p% G* i4 O
13.........: i7 R/ Q  f* c
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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," H4 Q/ a& B, @* h1 m1 m
等我搵下...

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; w. T# _& o. }6 j# @5 Q& 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:% J% I0 I6 x. `+ z
唔識隱藏...已經諗到..

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$ C; S1 P3 X9 Q. h2 `0 r* ?
sor !!!....e加改左9 [4 _, D  C4 \

1 s( Q# Z5 M& x' j4 I$ q* q8 M2. 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% I. d) G" O: Q4 x9 U2 `
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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:+ J  C$ h; D  Z: O; t5 |
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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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3 L" c( K1 s8 G" m$ E# g% pPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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3 O9 w, ~4 l3 y* t. a0 v! YThanks

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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

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1-6 vs 7-12
: {8 J/ y  w$ Dif 1-6 = 7-12     13 is fake
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Weight the 2 time * @- V/ `1 V; S5 ~# ?. i
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Suppose 1-6> 7-12
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- u4 S+ Q, g; ^0 y  ~% v/ j! C0 ]1-3 vs 4-6 7 p* G) z8 f  s( ]) C# \
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Then Weight the Third
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Suppose 4-6 > 1-36 O4 c( K  O$ ?8 \+ @4 Z5 ^* ]

, _# `) m$ n$ a9 D# g9 i/ fJust like the first Step
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) S' T) _. i) c& ]) K1 Y& Z- l4 vs 5
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# c  V/ s# f' ~& t/ a- q! wif 4=5 6 is the fake one
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5 ]9 }. N+ F# y  cif 4>5  4 is the fake one 2 o  X5 ~3 O: g+ O# E) n$ n
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and so on......................

hello1997

分3組4隻波子秤
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' C; O+ f+ _. X5 x8 iGroup A: 1,2,3,4
; r2 K& i, N7 I3 q+ W; [Group B: 5,6,7,8" u2 D( h( j) L$ J# w
Group C: 9,10,11,12
" A0 x# N5 l% B8 @Group D: 13- i* ^: W( U. G0 G+ _0 g/ b1 p5 F* M

) C7 @: c0 y, j% w# wRound 10 U* F0 b; y% w% b' z
Group A vs Group B7 o3 L4 _2 Z" j: r% J
如A and B一樣, 即較輕一粒在Group C or D3 Q3 G" }3 a* }- l* d4 B# s

5 R, Y) G; h. t/ `; f" ERound 2" v1 h7 c' x' P  y- A. g, m, U) e
再在Group C拆成:
3 I/ B# h0 O2 A4 d8 oGroup Ca: 9,10  X# u! i4 d! m  T% m5 z; D; R% I
Group Cb: 11,12% x8 o& K7 Z& j0 J; c' D# B
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, 2 r5 E4 [* B) S& k) e. ?+ e
要再秤, Round 3, 之後便知答案.3 ~7 {9 H2 j) @) |* B! \* Q2 F

) K0 Z9 C' V8 n; I7 c. f- u8 }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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Round 2
  i  {! i6 U& z4 w2 G9 h# C$ E0 b9,10 vs 11,12 = 9,10 < 11,12, g3 v/ g& K" z; Z

# m" z/ S8 M9 I' L# }, lRound 3
6 ?' I. t/ ?+ V+ _! G. o2 l6 _2 b9 vs 10 = 9 > 10
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The answer is 10.
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. b6 J: h7 @0 r( B" ie.g. #2 假設7為較輕的一粒+ e: r5 g! ]& C' |
Round 1' {, t  T5 @9 B2 v9 F6 N: |; l
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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3 X! e$ A% Z, H, H8 w- fRound 2% h5 c- q1 D3 d  G" z' ]; b
5,6 vs 7,8 = 5,6 > 7,8
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Round 35 d& y6 Q3 @! ~% V" {3 K) T
7 vs 8 = 7 < 8
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( v5 t+ {- E& V# q. IThe answer is 7.
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e.g. #3 假設13為較輕的一粒
' i9 L4 t1 d5 b4 f* g4 Y3 c8 nRound 1  y7 s- E3 p8 E
1,2,3,4 vs 5,6,7,8 = equal; {7 Y2 H3 n! ]" m3 e% Q

: S* v5 U! T( v* u! QRound 2
* y! ~; K' l# J5 Q6 x% p9,10 vs 11,12 = equal
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No Round 34 J$ a! J3 j" X! w
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The answer is 13.0 i* l$ x2 ~+ n, @, S* m

% V. D/ ?& A& ^( q- b唔知我答得正唔正確呢?!
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[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:/ l) d3 U3 X8 P& e/ C8 x* v7 w4 E
1.
' n$ r& o6 U0 Z' }6 O6 ]1-6 vs 7-12
" h  w9 [8 d$ c/ w/ o* u4 z/ rif 1-6 = 7-12     13 is fake* ^& Y' z2 R6 Z$ J9 X
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if not
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Weight the 2 time , `% Y. v) _+ T( `2 V. a

2 W' p1 T( \& O( oSuppose 1-6> 7-121 U5 A3 H( i) z" L

( D+ ]" o8 |8 Z7 W: m: B' X1-3 vs 4-6
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6 ?3 e# ?( v, J) M% X0 X5 fThen Weight the Third6 {6 u3 ~" Y5 q! N$ Q
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Suppose 4-6 > 1-3- X5 P+ i2 `6 w- G% n

2 a( W/ H3 q& u. {2 \/ `Just like the first Step8 q4 J- `7 z) u+ I6 L
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4 vs 5 8 f/ L3 C5 p* @8 V

  D8 ~1 n2 J# w4 Cif 4=5 6 is the fake one 4 P* y, Y) [) |: h' L
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if 4>5  4 is the fake one
) X( P: Y; D9 i% k% c" [, r1 I$ Yand so on......................

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問題第二步
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$ }, A, ^1 x* R" }+ H% R- XWeight 1:  1-6> 7-12  X/ I# |7 g& u& X+ j9 _3 S6 z# m

5 Z9 ~9 s4 K+ @! v" TWeight 2:  1-3 vs 4-6 , if 1-3 = 4-61 S- ]! c# S2 T, ^4 r* ~
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你第三步点去搵 7-12 边一粒???( Q; j  _+ A- u8 x

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8 n3 `. n9 b2 p) A  b問題第三步' f- t* t: W" S2 ]1 i: m! T
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Weight 1:  1-6> 7-12  I% }  q2 C) @7 x
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Weight 2:  4-6 > 1-3 + ?- _# V/ Q# P  x/ t! @3 f0 }/ ^

" C+ g, v5 G! ?7 u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