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  c* r& l; s5 q3 m3 }
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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)。: w: A# D, q5 F$ E# s5 G
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？』0 R8 h6 |3 I/ j- I, l

0 k& D( v2 _% X0 V% Y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. 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
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! b) U# v, F. f( D1 T! s! d: }[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:1 B1 B0 W( C1 H1 n
相信e條題目都有吾少人玩...

% k0 r0 J2 A! Y: n5 S' @+ a我以前畫左個chart去答,9 q6 D4 }: `5 k( P( F) F
等我搵下仲在吾在" [" N5 w: ]" u( X+ m1 y

7 i9 e" q& y: x. f! K$ X* ]1 I當日用左37分鐘答１２粒波子，差７分鐘才合格。8 N; T* k* L, e& k
13.........
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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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! p# k) \5 _% _. M我以前畫左個chart去答,; _; L" X6 v- A+ [
等我搵下...

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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:
' K5 j2 v+ r7 B; T# h唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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3 o% w) q6 V0 C+ I[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:3 Q1 ?3 l: ^; z, W9 E- E0 _1 I
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.6 |! e6 i, u$ r4 @6 J* \: h
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:) b2 v% \1 x) k* f) K) E# G; B

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.5 p' Y0 y% J3 S

0 P( L. E7 W/ P; _5 H2 t5 z" ^6 cThanks

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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

1.
+ B; Q& D" Z) @( X) M# M: i# F  j( @1-6 vs 7-12
/ t, P4 z; N1 i7 e0 a4 J/ eif 1-6 = 7-12     13 is fake3 h8 G3 A9 Q! [0 t) X$ v: b. a

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& b8 D: o7 P1 qWeight the 2 time ' ]8 a; \: J* C; {

' E2 @$ L2 Q2 i( C' }Suppose 1-6> 7-12
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1-3 vs 4-6
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" ^5 b5 }4 \7 w( H3 p: sThen Weight the Third/ ~! U) l" }6 S# l$ A7 C& t8 S
3.& b6 b; ?; O$ \- M; a

/ i9 X- F0 s3 i3 Y+ TSuppose 4-6 > 1-3
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Just like the first Step! }2 D( Y1 W. o1 |
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4 vs 5
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if 4=5 6 is the fake one 9 c% m7 i6 B& h1 G, o
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if 4>5  4 is the fake one ! l% s. d: l* ~; F/ s
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and so on......................

hello1997

分3組4隻波子秤$ @) ^5 v; r+ J- h. L- s

+ |" E% a2 i+ tGroup A: 1,2,3,4
& H1 `' M+ @) o6 mGroup B: 5,6,7,8
( N9 G+ p' M& \8 V2 sGroup C: 9,10,11,12
" _9 L2 ^8 d: t( [- M, K  i6 VGroup D: 13& U9 D2 ~  B& x' Z0 q
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Round 1' i, w+ p+ d. q1 J( d7 W# p8 @$ H
Group A vs Group B
2 o9 H# {3 R& o" F, S- e8 n/ E! N如A and B一樣, 即較輕一粒在Group C or D7 G  N+ |& w9 t6 D3 ^% M! |1 n8 o. O8 c
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Round 2- m9 \; g! j3 i1 {
再在Group C拆成:
' \+ G1 n% K. y( P- @# SGroup Ca: 9,10
* o8 ?" c; y/ }% |" U$ ?' nGroup Cb: 11,12
) g( m2 f9 B! c) H, K- K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, , s) W+ I* [, W- x& m% Q/ g$ h  N
要再秤, Round 3, 之後便知答案.9 X" U+ ^5 J, u" N4 j* m0 C
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e.g. #1 假設10為較輕的一粒7 w1 C3 h* t- d( g
Round 1
+ ?1 W, _; X  N: E$ l* V0 F1,2,3,4 vs 5,6,7,8 = equal( l% b5 p5 [5 X' F

/ ~; ?8 H4 u7 K, n7 PRound 2, j, ?6 u* P5 S( I- j9 s
9,10 vs 11,12 = 9,10 < 11,12- t8 N5 I* `- P# ]0 n

- ]' G$ D2 {& x: l! GRound 3
5 @  l6 F* X" j  }9 Y2 k9 vs 10 = 9 > 10- I3 ^" t$ L) w. l+ b
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The answer is 10.
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& d- x% U4 {* Q: L1 f$ p5 Z% \e.g. #2 假設7為較輕的一粒# B$ r& B# r7 S& Q# g6 o
Round 1
3 n) l& q/ u4 D$ a  r. P8 P1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2; u: B$ O8 F% M( q
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
' D4 t+ ?4 j: z4 E  P7 vs 8 = 7 < 87 \0 O( ^& v! t5 p0 G

6 ~+ b' a2 M7 e4 N3 k. O3 e) ^$ cThe answer is 7.8 z( t6 Q- M: \5 i7 K1 ^
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e.g. #3 假設13為較輕的一粒' w4 o* z2 ]( O. B3 K* P
Round 1
4 n0 ^( _, O: T  b# l/ m& F1,2,3,4 vs 5,6,7,8 = equal
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4 ~1 y3 A& x7 Z1 BRound 2
6 [: l0 t$ H" ?4 b$ ]3 k( U9,10 vs 11,12 = equal1 g: Z: a1 q+ N, A! a
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No Round 3
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- @+ p( q+ h/ s  T5 `& jThe answer is 13.9 `3 x/ t' X0 @7 U: x

+ y: ?) F, r+ b唔知我答得正唔正確呢?!
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5 s3 d/ }3 i* [% z- `8 ~$ U# t2 N[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:8 Q) {5 y5 @) D" i1 J. |( Y' _
1.: j0 S) \2 z3 k% D* k) h, d: V
1-6 vs 7-12
+ |0 j. h% U7 J6 X6 g3 O% N# [/ Nif 1-6 = 7-12     13 is fake
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; J7 Z; {  S' ?* _5 q1 vWeight the 2 time 7 {% m7 c. w3 @5 ~6 X* A* _

! T9 e2 a, c/ v, ZSuppose 1-6> 7-124 n3 G% ]6 v" U5 z- U- e# l9 c
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1-3 vs 4-6
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Then Weight the Third/ J6 s9 [- F' L/ m! {" E
3.7 Q  ^( T# T+ |' ~

. V- n( w6 @8 S+ J  P6 zSuppose 4-6 > 1-3& t0 ]. ?# y) T: [3 F$ o
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Just like the first Step3 X7 `$ E  b6 M) c1 T
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4 vs 5
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; H" f& Z. [& N% e6 pif 4=5 6 is the fake one
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* q& O! L2 v2 K0 Uif 4>5  4 is the fake one
# J; c, B2 o; G! Q* sand so on......................

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& c( |: `; t. A" W. k- S問題第二步
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Weight 1:  1-6> 7-12
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7 @' O4 w; V! R" r& iWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6) ?2 [8 k$ \' f

( l4 ]6 Z0 P2 g你第三步点去搵 7-12 边一粒???3 Q1 _2 V- \' k& v8 x" }
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問題第三步
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Weight 1:  1-6> 7-12
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4 s# S) l5 \7 ]) L; @Weight 2:  4-6 > 1-3
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7 f' D' ^3 U+ `& t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