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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4 e8 F7 ?  v! ^8 s/ {0 b7 b& P2 I( z『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)。
; X) L+ y1 C3 [7 c" 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？』0 j9 e7 G. d. a0 h: x8 r
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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7 \" c9 G# Q. _5 o( [% M& G3 {/ l. i

$ @6 k+ R' o. c4 s. |9 a$ F2. 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:
6 }' j: C8 h8 X; M, ?% W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,
5 `% v) ]& {" D等我搵下仲在吾在
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$ \5 J! K$ z( ?- w6 C4 @當日用左37分鐘答１２粒波子，差７分鐘才合格。
( Z1 [4 U' K. K3 a) @13.........- u% P! ^0 L% a9 Z6 J
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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:; Z. c2 `) x. X3 C/ ?

5 B, W1 |" B4 J* `6 l我以前畫左個chart去答,1 I: m6 p4 o, \/ v2 s2 I
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:
/ @! S/ l; m9 u7 q+ n唔識隱藏...已經諗到..

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sor !!!....e加改左& n0 I# w! a& X& o
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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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0 q- |2 q% F2 i& l2 t2 H[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: F6 m" m# u1 b  X- z0 o* d* M
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:: w9 n& n0 \+ K4 f! Y8 ]+ B
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  N* r) v* ?  k0 j4 ]2 S8 i, \PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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
+ N+ Q/ q7 s% f& s+ M6 {if 1-6 = 7-12     13 is fake  k, E' F4 g1 O/ w
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7 d& t4 Y0 T# S* N' A. a5 d/ kWeight the 2 time 1 Y1 p3 p- A! s5 B: `

2 C) x# p1 p7 \, nSuppose 1-6> 7-12
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1-3 vs 4-6 9 t+ p5 ^! Y% c' F% r+ S) ~
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Then Weight the Third
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: n+ G) k  J# {& S! Q# B, ?, ]Suppose 4-6 > 1-3
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Just like the first Step. }5 t1 R9 J9 b) s% }4 u; c
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4 vs 5 % L# g; Q) i* y4 ?, y
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if 4=5 6 is the fake one 0 E# ~. Z/ J$ i8 H
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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  i% P8 v9 R. `% B2 _8 z% o% `% K

3 }" V' q3 X9 l8 x3 jGroup A: 1,2,3,4
  D/ r$ p( j5 s% X: Q3 T: ~/ j( GGroup B: 5,6,7,8+ W) v: A0 y! w' w4 a
Group C: 9,10,11,12
/ i2 x/ v% t3 a! n  V3 T8 f! Y3 jGroup D: 13( h, H+ j4 E9 L: r& K3 W

- M+ |0 t* W8 C! c. q) G! gRound 1
' Z% l' M+ ~7 q7 z' u7 SGroup A vs Group B) z# P) s9 g- b$ d. A6 c" S; y: Z! D
如A and B一樣, 即較輕一粒在Group C or D6 \1 q8 `5 P6 t3 r" g- k, L

* ?! @$ X3 i0 f) v# B9 y9 IRound 2
$ l' j. h# i- Q: m- A6 B再在Group C拆成:
8 z/ q2 S0 O) W3 L* P8 `, LGroup Ca: 9,10) \1 E& q4 S: l
Group Cb: 11,12
6 E5 C+ R9 ~7 P0 w然後再秤, 如一樣, 即13為較輕一粒.! f) |) o) `7 b  u/ P7 Y  G5 B
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如不同, 即較輕一組有一粒較輕波子在其中,
1 F! K* U, n9 t2 B' Z- m要再秤, Round 3, 之後便知答案.2 U, t# u& b! J' m  O' Y* g
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e.g. #1 假設10為較輕的一粒* Q% ]3 y" l  y3 \
Round 1
' z" k" \% I; u% ^0 C1,2,3,4 vs 5,6,7,8 = equal
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4 _$ Q) [3 @2 @( j+ o2 R4 ]& pRound 2
/ D% G" H/ D1 |+ x7 r( ]9,10 vs 11,12 = 9,10 < 11,12
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Round 3% v2 x% K: \) D! B9 t' P
9 vs 10 = 9 > 10% @4 A& |3 t! [2 _6 _
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The answer is 10.. s5 r  ]0 ?6 x* t0 W: {1 s
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e.g. #2 假設7為較輕的一粒# j6 N/ ~5 @% m6 b" m! @' K
Round 1. j7 N) G% N1 y* F: Q* R
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 w% ~, X0 P% P) T

* c  _8 D3 ^/ M$ u; {, N$ `Round 2" A5 i' Y0 O. L# s$ m  p5 v% i! K
5,6 vs 7,8 = 5,6 > 7,8
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, X3 c4 l) |* [- n! j/ M& n* mRound 3
$ f) u6 N% b' ^  g, u7 vs 8 = 7 < 84 A# i( U$ {4 J! I; j* L

- d9 Y% x1 e0 I( l- Q6 ~. @The answer is 7.) c0 w- j, J8 `6 n5 \0 c
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e.g. #3 假設13為較輕的一粒! V2 y' w. V; }. k
Round 1+ q. ?+ C. v; ~6 W' P
1,2,3,4 vs 5,6,7,8 = equal- X6 Q$ R+ s: z7 w1 @3 J

1 q9 H( `$ V7 K5 s/ G/ PRound 21 _6 c& r6 c( v0 j+ F3 ~+ k
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.* f% T8 i# B0 T+ W& ?% v
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唔知我答得正唔正確呢?!
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: y- e5 }; A, d% F# E" k) e[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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1-6 vs 7-12
0 E# X& M$ b" rif 1-6 = 7-12     13 is fake7 @! p$ c2 T7 d

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+ i& j( h" q! |" C4 b* l0 jWeight the 2 time ; p* i, g$ I; ~& |

1 S; ^4 L  L3 L2 pSuppose 1-6> 7-12, p; P6 O" @' d* A

) M& I: v! |* y; P+ d4 e7 R# }1-3 vs 4-6
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5 a4 D6 Z* r" @9 fThen Weight the Third, }( K0 H; l5 q; m
3.
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1 t( ?0 u. q' r! E% z5 p0 PSuppose 4-6 > 1-3
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Just like the first Step. f3 @3 I! g- j# {5 b: I5 f; k* H

$ t0 S: {2 |2 E: a4 vs 5 : _- K# F- T* R/ Y# O
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if 4=5 6 is the fake one
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/ M/ z, ^  Y" cif 4>5  4 is the fake one
6 m5 B. v4 J" L6 D. Iand so on......................

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4 ?% b$ `. @5 X2 u0 o問題第二步. Y) V) v. A5 n$ R7 I) ~

( r$ D+ [3 d. h6 DWeight 1:  1-6> 7-12% O" `! r9 r* ~
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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2 T! [! R% e: L" R你第三步点去搵 7-12 边一粒???5 ~+ u% w% t/ C2 R0 v* `" a/ @4 c! B

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問題第三步1 H' B" K. T; O! C

0 x" Y5 ]- T- a8 j  Y7 aWeight 1:  1-6> 7-12- I# ^. ]: r. a" F2 A2 f0 Z
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Weight 2:  4-6 > 1-3 / r: a! r% t5 Z4 Q+ b9 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