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; A: W$ M- Q/ @
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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)。7 b6 t; U" a9 E/ N/ H
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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注意:   E( d) e& ^$ [% {" i1 h

& h* m$ H4 Q3 `4 Y- ?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$ s4 k3 E) o( B- U
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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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9 ]) P7 X  D6 a+ {- y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
# T: v, \! H" K# m6 X9 r相信e條題目都有吾少人玩...

" ?7 r; r' I2 j8 u* I$ |我以前畫左個chart去答,& a2 [% L4 h4 T2 u+ n) M
等我搵下仲在吾在' W) r1 w7 ~8 n) F' N4 e

; g" j* o9 T3 M4 R/ {當日用左37分鐘答１２粒波子，差７分鐘才合格。
( D# E5 n+ D" |* R7 ^" m2 Y13.........
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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:! A1 ~% Q  X/ `# W! v7 X7 Q* S+ A+ ^
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我以前畫左個chart去答,
: ?5 [5 ?0 c8 o" S4 q6 _% e4 o; g等我搵下...

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# J; a5 i- z8 C' n9 X* E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:$ z$ [, ?. {1 r- P$ H( d
唔識隱藏...已經諗到..

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( f7 U3 p: J# \* g. `0 asor !!!....e加改左/ A5 l- e; u: N% t( m9 b
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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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+ V! }8 {8 I% B& J+ e1 m[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:0 `0 A1 p& p" B2 l
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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: s2 l; m- d( r. x- d: _+ mThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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( P9 B+ Z7 w8 F- h, f4 L! D4 ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.7 B' G8 f) l0 I

& f5 z7 {. p8 i4 [0 VThanks

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  [/ W5 ~; k! [6 r' \7 b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' t* H9 J, v3 p
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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. K5 d% ?' g% ^: ]1 J4 OSuppose 1-6> 7-122 i, C/ p$ p. n3 U  O' s

9 ?! m; _# ~8 F6 W* |4 f/ t1-3 vs 4-6 * i% _- O' L: S7 z: R) m
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Then Weight the Third& B7 G9 U* s2 d
3.
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" {/ K! J) ^* lSuppose 4-6 > 1-3
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. I3 F2 B$ G( d$ ?: N. MJust like the first Step
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4 vs 5 3 J: Z  r7 i- O* ^4 C: e
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if 4=5 6 is the fake one ; _# m0 y6 k+ h' C, Z# L. F3 n
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if 4>5  4 is the fake one / a3 m8 x/ W1 q' H
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and so on......................

hello1997

分3組4隻波子秤$ K  |7 v5 ]; P+ U- }$ B

( S! v/ U/ U! Q# T' R. RGroup A: 1,2,3,4
8 Q1 q4 o) h1 E2 pGroup B: 5,6,7,8
* \: S8 U7 B7 A) Y$ U- DGroup C: 9,10,11,12
3 H& c# g8 E) y8 SGroup D: 131 ?: |# _  V; O. n. J

9 [  W0 Q4 b& zRound 1
5 c5 g' p  C/ vGroup A vs Group B
  i$ ^! [2 s" g0 ^( W- z6 t/ @& A9 {如A and B一樣, 即較輕一粒在Group C or D. l& b- U& q& N7 L" \& d! a3 H6 T
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Round 2
  R- q# G: H5 m6 S. k再在Group C拆成:
% o/ r: f! v1 w- W7 E* DGroup Ca: 9,10
( j6 D9 r5 J& _' f- J/ g- {( G7 yGroup Cb: 11,12& _) J. _( h. e2 P" \7 t: d
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,
( o% v7 a. Y5 _  F' l  l/ F: o要再秤, Round 3, 之後便知答案.
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8 [: J% E7 U, h2 \1 Re.g. #1 假設10為較輕的一粒
: ~5 c& K& H6 ]/ k! HRound 1/ {0 S$ R# `' O  R
1,2,3,4 vs 5,6,7,8 = equal
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3 Q  \) H# y' j8 }Round 2* a( o5 X0 \6 E- M0 }+ Q
9,10 vs 11,12 = 9,10 < 11,12( f  A: }, ?) j# C- f- x
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Round 3
! H  f6 s' G; _  p5 D: `, [9 vs 10 = 9 > 109 J( I5 s" H" U% N' n. F
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
+ B- n8 E) w3 s6 M# c/ B$ pRound 1
- M1 z5 |& q/ |1 O1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* V4 B9 Y) \: ?& r" K4 N" w
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Round 2
5 O5 D! O9 o" N2 D5,6 vs 7,8 = 5,6 > 7,8
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Round 3+ F! r- s' Q; |0 @6 G/ b5 D! P
7 vs 8 = 7 < 81 t- C. ~$ W, y  h- @
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The answer is 7.
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1 ], j' s& Q* D4 h. {" p( ue.g. #3 假設13為較輕的一粒7 D9 Y* y- Q6 R4 g
Round 1
- F. w4 {" z" ^. G" e% S9 H1,2,3,4 vs 5,6,7,8 = equal# k$ H$ x( X* f  j' a
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Round 2& T% f1 }- N; q2 k/ I- q, @
9,10 vs 11,12 = equal
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No Round 3
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( T% R* E6 V( U0 V! h' \$ {; dThe answer is 13., `' m& ]) g) n5 d2 J
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唔知我答得正唔正確呢?! $ q5 t8 h0 e* T0 g

# ^, t/ s. I: I4 q, A[ 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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' i& B9 l) U& I5 z1-6 vs 7-120 n( P3 A/ f( G1 S& V" x
if 1-6 = 7-12     13 is fake
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if not # Q/ O2 d3 f6 J2 Z6 R! g& ^# i! {
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Weight the 2 time
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Suppose 1-6> 7-12% ]; @) e: H% R( H1 W1 l0 Z
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1-3 vs 4-6 5 L9 T1 N# x- P0 ^! [- m

* `& t0 Z4 x+ I" P" mThen Weight the Third% j( J( p/ r; w  p/ d7 N$ L
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+ G% r) o, v% VSuppose 4-6 > 1-3" x. ~5 C* H0 S, f0 u/ p
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Just like the first Step
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; ^1 u  X+ Z  v/ y7 e4 vs 5
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7 [/ Z1 K# v- H6 cif 4=5 6 is the fake one
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if 4>5  4 is the fake one
, J/ R' z0 s0 E) a! Kand so on......................

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問題第二步% M$ y: y$ s- {; A7 V; X5 X

+ r" b! \* d8 A' G* t- y3 ?Weight 1:  1-6> 7-12
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  C" r$ \" n7 m' jWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6# h8 `( O" x2 P. z8 Y. z. R; G

2 Y: N( ]- k. |6 X2 a- z6 `1 i& j你第三步点去搵 7-12 边一粒???
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  n, t9 w- ?7 M' C4 \$ x========================================
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! t, x3 K# |7 d) u/ G問題第三步4 G+ ^, Z) S, h+ w

( d4 G0 n' ?2 c& S) R1 G/ PWeight 1:  1-6> 7-12
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4 t3 m( ]: n! W5 J$ S8 E: g' b" ~6 t" }Weight 2:  4-6 > 1-3 7 A: g+ P" C- F: G% G( V+ g

$ r! w, }* g) N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