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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+ D5 m; C& C. n, {# s7 P2 g# ^『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)。! E- ?" p- j/ b. @" Y4 }8 E" A+ V# f
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:   d+ e/ {" X+ o
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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) c; P7 J& m, Z% t" ]( f+ j& ]
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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:
9 O+ O! z* ]! K( x! f! g/ D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,
& ^* _2 d2 ?7 f等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。2 s" t9 y5 {8 y5 P6 u
13.........2 F" t7 y3 ]+ A. @, y& j

& ~% e0 h2 Q! z& @8 L2 N[ 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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' f" K5 p# e* ]. l" U: w我以前畫左個chart去答,
3 z0 W! \( W: X# C" }5 e等我搵下...

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2 e" I* N: M, f, z" c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:% n+ i2 N" u, T5 n" I
唔識隱藏...已經諗到..

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sor !!!....e加改左8 F( X- z7 O. i7 g& a

( a9 j: N/ f  ?! 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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
- r2 v" m, C- ^  X# Y相信e條題目都有吾少人玩...

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/ Y2 f% @( a- ?+ c- FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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, d2 j- U1 Z( m  c+ qThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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: a  x7 n1 l, @, n" ]PlayPlay, Let me know later who has the right answer and I will add points accordingly.9 j  s) |+ N6 ~* B5 L8 ]& V
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Thanks

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4 j% _8 e2 E/ @4 |, u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  C3 P( N# r5 J* L9 Y$ ^6 y
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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* i  u0 k1 v1 {+ A4 tSuppose 1-6> 7-12# T; |1 `, b$ X' l) |
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1-3 vs 4-6
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Then Weight the Third8 L: s0 _  C/ [5 ~# x
3.
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+ e. J: U7 L7 @1 S0 G& FSuppose 4-6 > 1-3
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Just like the first Step8 m. n' [2 m7 Q) c! b

. O# _% J0 C- [0 x' W7 J+ d4 vs 5 4 @( c/ h; |% \3 k

3 s" o* k. a) x/ P! aif 4=5 6 is the fake one
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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+ [( ^5 q  W; {8 `) q/ D3 R
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Group A: 1,2,3,4
+ e& {  r. N) h! t, IGroup B: 5,6,7,8$ J* {* ~5 {8 z; L" V3 A$ G# j
Group C: 9,10,11,12# ~5 v0 E7 Z+ i0 M* F8 V5 I
Group D: 13# E8 C( i/ ]# v
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Round 1
+ Z/ Y3 C/ N" ]Group A vs Group B# U5 ^" j5 g0 {# B" W, w
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
- v$ l% W" o( c8 j% o/ `1 l再在Group C拆成:1 m: {4 L% z$ l1 R. z
Group Ca: 9,10
& q- P1 I! F* _; h. f- h: e1 |Group Cb: 11,12
4 ]3 O4 l1 r% x7 X8 K然後再秤, 如一樣, 即13為較輕一粒.  P" _; O2 m5 B2 ~. y* n9 r

) j) L& d! L/ K/ H- q如不同, 即較輕一組有一粒較輕波子在其中, 8 t0 r! C- P: o" v
要再秤, Round 3, 之後便知答案., x8 i, q$ C- Z4 I" _
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e.g. #1 假設10為較輕的一粒
3 q) |+ U. U8 XRound 1/ d" D$ `" C8 x0 ]* V
1,2,3,4 vs 5,6,7,8 = equal; B2 s5 K0 v6 h* N& W
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Round 2% A6 t; t0 J+ ?4 Y/ `
9,10 vs 11,12 = 9,10 < 11,12
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Round 30 j; p, ?4 b. d5 d: ^! N- \
9 vs 10 = 9 > 10
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The answer is 10.
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& b6 \# k% n' j2 b3 Fe.g. #2 假設7為較輕的一粒0 F; L2 R. f- ^4 W3 W! g
Round 1
" J. b0 @4 b+ z. H; k; H& e5 k1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2) l4 Q( V. H. m. G/ Q
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
2 h) b. |/ l9 o7 vs 8 = 7 < 8/ D1 @+ P7 p( m. V- B- v5 G* T( e

, X3 d' z1 j2 Q8 I! G& jThe answer is 7.* ^2 H" H2 O* m! t3 d% Y" x
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e.g. #3 假設13為較輕的一粒
4 p) J( D/ q; A- g" R7 x1 s) \& d4 e: qRound 1' Y$ u' ^; q% \" c/ {+ w/ a
1,2,3,4 vs 5,6,7,8 = equal6 V! s- @$ P, [  x! g

3 A4 B* T' d6 n$ m. I* [Round 2
4 {/ D* l2 b: r- ]# C9,10 vs 11,12 = equal. D7 W' a1 _* E9 I% x# V- H

6 N  \' D( u# O* l3 [' d6 ANo Round 39 }8 `( q% Q1 w$ K
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The answer is 13.
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唔知我答得正唔正確呢?! 2 m5 Q: `' e$ ]+ g' N& d/ a7 R
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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:2 J- O9 M/ A6 F9 U
1.
: a0 D( M7 f' h2 [# l& ^1-6 vs 7-128 e% f  C/ e+ S  V8 u: P* o1 }
if 1-6 = 7-12     13 is fake
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if not + b+ y+ d# b$ O/ ?$ j2 m6 U

; {! F/ H, ^$ n' H/ p. V5 tWeight the 2 time
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Suppose 1-6> 7-124 L; X8 \1 C" L- [6 u

& X! }. d+ r% [% Z+ Q1-3 vs 4-6 ; n  h  E' G0 \% S2 h! }

0 u; U/ m4 D! Z% kThen Weight the Third. n/ [( z; f/ k. m5 M4 Y4 T
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. E& _* c" ^- m0 HSuppose 4-6 > 1-3
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9 v* a1 R1 q. s" N( S4 `) tJust like the first Step
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. l; P, J6 u- p4 vs 5
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4 B+ u7 V1 u1 w' a' Z! oif 4=5 6 is the fake one
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; s6 z# J/ S  j  U# |# hif 4>5  4 is the fake one / M8 P& H+ Y* m" Y
and so on......................

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問題第二步& C0 M( \. V3 L' J4 m8 i7 B8 O' J
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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% t2 R1 b) U9 @你第三步点去搵 7-12 边一粒???' c4 M( j7 h! Z, A) e8 S

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問題第三步+ \9 W- T* S9 |

4 T) z# ]* P0 G" I, ?9 N: yWeight 1:  1-6> 7-12
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, ^6 k$ L4 }! Q) K8 L; q3 \  IWeight 2:  4-6 > 1-3 + p$ ~4 E9 g* B0 l- f* L& ]) w
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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