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7 d2 N! f1 f6 _0 d8 j' A
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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)。& P' h7 I6 ~. @& \. q5 Y9 D
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？』" h0 N1 L" F; o: C, h* r7 D( f0 V( ~

2 H- F; h8 E) i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  D, u) T  n1 C  A0 i+ u

% D/ s5 D/ P2 ?+ V, x  [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+ f  \" p& Z- o7 B+ l) H
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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:/ S$ c9 y& k. L% ^
相信e條題目都有吾少人玩...

8 W6 b( p3 }+ `: n4 f: ^' i我以前畫左個chart去答,- z; F: C" n( l4 C1 D- b/ K2 K4 ?! l# H+ a
等我搵下仲在吾在# u+ Z5 V/ N; C, f1 u
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
- [+ u  V8 a6 |& w: A: W13........., u) i; w0 g  K) k! t( K4 V5 a

: Y6 \  W5 r5 ]9 [! `; q[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% O/ [! [/ x/ L
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我以前畫左個chart去答,
& Y" i7 u! u# B2 w2 \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:
0 r+ g+ f8 z* E唔識隱藏...已經諗到..

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4 I1 g3 s1 }- j! C( nsor !!!....e加改左0 @% K! O; X; j, M9 g# O( n. W( Z

; z. \: x" E7 S! j! J3 G) C, R2. 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:" U. ?2 n  _$ |
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:5 |( ^/ a5 ]% o1 W% S6 F% r
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.  h6 T& d4 d1 F# J! u; A

; G. u8 W' I; H% Q( l% H5 bThanks

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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.
: M1 {9 `8 [: R! c& i% `5 Y1-6 vs 7-12
# s) c6 A# U1 Z+ o' t  mif 1-6 = 7-12     13 is fake) s7 ^( |3 a' b6 Q+ \- v
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if not ! l' U7 |6 U3 X) W. f

* D% l+ K6 S% z$ l7 j" F. nWeight the 2 time
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Suppose 1-6> 7-12* i0 v- v# g, E6 o
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1-3 vs 4-6 / b. j$ z0 p8 p4 g. B* M
9 @9 h8 W- W, M# ]6 j
Then Weight the Third
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7 N" ]; i. G: q3 C6 BSuppose 4-6 > 1-3) B* k9 N0 U, Y$ |

5 u4 ~; P* ?6 y- Q" U) wJust like the first Step
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4 vs 5   t& V1 h  |% K0 j% ?9 T( @
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if 4=5 6 is the fake one 7 h$ P" d- N/ _. _# C7 M, B
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if 4>5  4 is the fake one
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4 s1 ?1 c" v, sand so on......................

hello1997

分3組4隻波子秤8 W# A/ l: D% z: \

5 u$ h* @' w* c2 c* i2 z' JGroup A: 1,2,3,4
' s1 \1 v0 M9 A! v- T/ OGroup B: 5,6,7,8( [5 G5 h' o# V- `. k9 g$ u
Group C: 9,10,11,12
+ u+ v) S" d  l1 YGroup D: 13) U$ P( p; a' b  l" O7 n

  t) o* T. t9 g" D7 \! t1 ?6 uRound 1! f2 O# I- r% Y/ X
Group A vs Group B
0 L" \# r; ~6 s如A and B一樣, 即較輕一粒在Group C or D
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Round 2
( C3 E+ L9 ?6 j- U0 \再在Group C拆成:2 B9 a: S: c3 Y$ V
Group Ca: 9,10- @, t$ z  y" A4 y
Group Cb: 11,12
6 v8 u$ o# T) }然後再秤, 如一樣, 即13為較輕一粒.! ], V  ]$ l- @
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如不同, 即較輕一組有一粒較輕波子在其中,
9 t  q7 n& p' x/ d要再秤, Round 3, 之後便知答案.+ R, P0 E$ D( I# A, t( R+ n$ n. G2 }- T

. n6 z) d# `, {: J  W" [+ Me.g. #1 假設10為較輕的一粒
* X; }- B% [" |4 [! O3 [Round 1
% g5 _% u  k: V- `9 i1,2,3,4 vs 5,6,7,8 = equal2 R+ R( m, j' Z* l* H. c

3 Y, l4 U9 c* ?7 e& wRound 2
3 f! u& M* F" p: ^8 k% t9,10 vs 11,12 = 9,10 < 11,122 |1 B% A- D7 y/ K& V' [) Y6 z9 f
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Round 3' K) c2 D& G: q) Q( h. Q
9 vs 10 = 9 > 10+ j- W1 {( D0 L' l( g, {
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
- R$ @' N, L3 k" }Round 1
5 w6 |7 w3 w6 {0 Y) {1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2. D+ z/ {# M, P9 [" X) x
5,6 vs 7,8 = 5,6 > 7,8# t1 m) N  R, p; \
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Round 3+ ~1 T  m1 e8 a5 [2 e
7 vs 8 = 7 < 84 j4 ?) ~" Z6 q! t7 T& A6 }
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The answer is 7.3 v- n. x# n  X% [5 y

% L5 c& v7 H. a2 z3 le.g. #3 假設13為較輕的一粒; B7 Y' S0 E" X2 C/ K
Round 1
* o" O* k+ d: j) f. g1,2,3,4 vs 5,6,7,8 = equal
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/ T0 Q/ n7 q0 v! CRound 2
& R% g3 ^' M/ Y6 ^9,10 vs 11,12 = equal
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6 c) \- R& ~- [/ Z- WNo Round 3
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The answer is 13.
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% t! ]7 U1 y4 X! h5 O6 G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" d0 `9 g& c; g
1.
' Y0 C* [2 r3 t. D- R9 Z1-6 vs 7-12) f5 p& {7 ]; a1 ?. @
if 1-6 = 7-12     13 is fake
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, g# c& f, }5 k8 M- iif not " x$ r" i3 s! j# S" b# i" ~

  E, q# ?0 q7 mWeight the 2 time
% a3 ]4 H8 Q- C" m, d5 @- T& ~! Z2 g3 x* [( _
Suppose 1-6> 7-12. y, i/ r7 @+ B+ g1 D$ N
1 O; |8 X1 ?& w7 `: d. N
1-3 vs 4-6 ! L& E/ d4 d& c0 f7 ~
. P$ [6 y" B3 o& D& \: c/ }# `
Then Weight the Third$ J2 C1 z' s/ ]  ~% R
3.
% b- ^3 w2 }8 F) a0 }" B4 v
% @# p: R  ~* kSuppose 4-6 > 1-3  f+ i  b! E/ A

7 Q! O! a2 k% V* a) D, kJust like the first Step
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- z7 H5 K! g4 o( W/ ^: t4 vs 5
& |  `0 n1 a6 O# |" E+ y: z6 o" V3 R& M( k
if 4=5 6 is the fake one - {( Q, l7 F+ I/ q2 X' j
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if 4>5  4 is the fake one $ e2 A& G# T, x0 @) U' w
and so on......................

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問題第二步
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$ N& V! `( X1 k3 _' LWeight 1:  1-6> 7-12' w- Q' J+ {3 o% |( b# _

; c4 K; T) G- w/ E% i. \Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, u+ f: E; q  A3 s' D
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你第三步点去搵 7-12 边一粒???% N4 E- n; ?7 F5 o2 Z4 M# u

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問題第三步5 y$ d4 [0 @* U7 Y6 o  k8 \
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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