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: E) `) W2 X  n  E/ b; H! r8 q7 B
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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)。
; j+ f; Q# x1 L$ W9 g- 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？』
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2 t, N. L9 f  j2 P. r( b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% }& m  x: C! j% ~  t& l$ j
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:" `8 g/ Y/ H9 d5 n
相信e條題目都有吾少人玩...

, s% z+ }8 y. O* d我以前畫左個chart去答,; o: f) S* h1 b1 V: x& T) R( U2 n& E$ ]
等我搵下仲在吾在/ Z% W, I# ]( k/ w) E/ D+ B( U

+ V" R+ `1 N3 s1 r當日用左37分鐘答１２粒波子，差７分鐘才合格。' j# w5 J8 M* U% f) L
13.........
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4 v4 V5 j7 `7 ?& P! V$ |3 k5 O[ 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,6 Q/ t! f) N( H0 @
等我搵下...

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% a: J, R) [4 t6 O0 O7 l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:
* a0 X' m, j( M8 E  ^. T/ W唔識隱藏...已經諗到..

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sor !!!....e加改左
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- v8 E  W0 Z1 Q0 o- {, r, D2 O) ]9 i2. 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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+ e" _. m0 Y/ v1 \% H8 A5 e[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:. b1 z  n3 \2 H5 G2 u4 N
相信e條題目都有吾少人玩...

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" t1 e# Z3 W  [PlayPlay, Let me know later who has the right answer and I will add points accordingly.4 [% R; }( V3 Y" C3 _) V

! v9 Z# q+ h1 J6 B- u, s1 E- aThanks

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.- f9 u8 `# i/ \# W$ u8 L& d& G
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Thanks

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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. k; W' H1 ?4 @( w5 O
if 1-6 = 7-12     13 is fake5 n: L  x2 ?1 ]" [# u4 I9 k
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if not
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Weight the 2 time
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" U0 D, a$ z8 u. oSuppose 1-6> 7-12- ~8 I' w. ]4 p$ g; [. i& Z9 e

- {0 Q% l( X3 F# o: E$ T+ j1-3 vs 4-6 ; Y) r6 p$ H4 D  a! {4 [, r9 D, N
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Then Weight the Third) E6 i# q3 b9 P; e1 F0 W7 y( N! O
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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; v$ o+ |3 Q; k' M+ q0 H/ Zif 4=5 6 is the fake one
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if 4>5  4 is the fake one & ]7 C' H. w0 L6 o5 K4 X" W4 t
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and so on......................

hello1997

分3組4隻波子秤) Y% G' U: ?. H7 g3 H
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Group A: 1,2,3,4
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0 w6 \6 e4 L0 L& k: QGroup C: 9,10,11,122 k' b6 h4 r) H/ A: n
Group D: 13
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1 i5 C: c4 n. y  oGroup A vs Group B3 G, n0 d  F+ H: ]
如A and B一樣, 即較輕一粒在Group C or D4 y0 r6 G3 [# p# y+ \- \
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Round 2' W9 M6 r# P( o
再在Group C拆成:
% U6 [# B# b7 yGroup Ca: 9,10# ?1 E) T7 }, D1 ^& q
Group Cb: 11,12+ l0 L" g$ ]; |. Z7 O) ~6 i* \: V8 g
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, 8 x! {4 z+ N+ o' b4 i
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, Y3 v( N; S% G+ v/ ^" U( N
Round 1
$ O% i; s! S. q0 m& V' o1,2,3,4 vs 5,6,7,8 = equal
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% g0 F! z$ f+ }2 D( DRound 2
' Q1 e4 m6 S3 i8 D  P9,10 vs 11,12 = 9,10 < 11,12
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Round 3) u( p5 N7 v2 [5 w: K  u
9 vs 10 = 9 > 10
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The answer is 10." m; c; C% g  K

2 a$ ?/ H. }8 I! G3 J* d" Oe.g. #2 假設7為較輕的一粒% O) e/ R: J" j6 B
Round 1
; K" U: y' r2 a! `1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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! n+ }# e; W& t* g2 e& a+ t; HRound 2  s/ T( q1 g6 e0 T. B
5,6 vs 7,8 = 5,6 > 7,8
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Round 3( `4 v% ]  D( _& }
7 vs 8 = 7 < 8
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The answer is 7.' H( k1 I  s! ]7 p  \, v
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e.g. #3 假設13為較輕的一粒
" z: x$ \+ A# e/ ]Round 10 L! _6 F& Y" Z+ G; B' |; J! C. S9 m" u
1,2,3,4 vs 5,6,7,8 = equal5 V% }  q! i* o0 J5 S# W
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Round 20 X7 c( _! m! d6 I5 _$ Z- O' j
9,10 vs 11,12 = equal
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No Round 30 ^6 B" U/ |0 k* W7 r
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The answer is 13.; U/ q$ [* v. A

% n2 g6 y: B8 r8 L' Y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:$ V; X+ @, w7 Q6 {( g8 s; n1 \7 `: t
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1-6 vs 7-126 G" P6 H3 Q7 u" r7 L; ]
if 1-6 = 7-12     13 is fake, w9 F6 M' b: k- E- l
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if not
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- s0 _- o: k) _Weight the 2 time
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Suppose 1-6> 7-128 W5 f( @1 Y3 `# T0 P) ^$ j. ~( r

6 v9 y/ L& s) K2 A1 J3 D' e1-3 vs 4-6 1 m- M2 u( E* V) K% |" n7 Z
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Then Weight the Third" }, b% X/ |0 u8 c6 X
3.
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  b# ], y6 R+ Q8 j! D- Q# H7 _3 d( dSuppose 4-6 > 1-3
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Just like the first Step4 H2 M8 Y# a- ?5 O
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4 vs 5
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if 4=5 6 is the fake one 2 d- J3 x  k2 H7 l- T9 M4 o

1 D" g+ I% Y$ h) ?: X, q0 |if 4>5  4 is the fake one
. X3 h. r5 _) s& a) Mand so on......................

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問題第二步3 X3 h! [" Q5 \2 w3 g
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Weight 1:  1-6> 7-12$ f( Z1 t' `- ]

/ P+ [0 b. H+ [" P) dWeight 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???/ O4 y0 N6 w5 _2 X4 L
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========================================
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3 {6 E7 F* A% j, d3 d問題第三步, c* t9 E# T. @& L, S* q# w

* d$ w4 P0 v' D, KWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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  n% Q/ R# @. k* X' y- {* a7 o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