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. d1 I) j) d1 R) s! i% z3 e, Y( u
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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)。
2 ]1 D8 B) z) @1 x& S/ i& ]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？』( N" Z& `, k( C$ v
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注意:
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! y7 f( X) v, y4 h2 J0 U1. 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, T) p; M: Z; Y, N/ I$ X7 |

9 N: s. }# Y' r. ^8 L8 z2. 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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. c; q, y' F  z9 q$ K[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:3 \+ `1 S  y+ z( Y- @( ?& s
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,, N. [) p4 u1 P! M" x
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。
: \' p: d* {  d! l: Y1 d7 E13.........
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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:- P* u/ H- W5 ?! `. m# x: {$ V9 g

& w+ G' ?  Y/ n1 W7 w' o  C我以前畫左個chart去答,! u  C8 W( G1 Y% [' F
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 a1 e! G. Q+ M
唔識隱藏...已經諗到..

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sor !!!....e加改左
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
$ T% H4 f: I5 P' x相信e條題目都有吾少人玩...

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3 J3 m$ r7 {( J7 R( R* C) Z6 E: ?- |PlayPlay, Let me know later who has the right answer and I will add points accordingly.  X8 e  Y. F1 f4 S

0 Q/ L8 c7 I5 z: J3 n! ~+ RThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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) v5 I  A" F! m1 G1 @PlayPlay, Let me know later who has the right answer and I will add points accordingly.$ g- d4 ]* ]) c
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Thanks

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) P( p& j1 J$ Y! a$ c+ s% K% V不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
* |/ n" _" `% w2 l5 G1-6 vs 7-120 O) u$ t4 n' ^$ L* v& a
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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" N, P* q) ~/ a; z! l& MThen Weight the Third, T" G4 V; h+ X& |! n" h" B
3.0 [6 x- I# x4 P( i
0 ^4 Z+ b. N( |8 |  x6 ~
Suppose 4-6 > 1-3
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& z2 l3 H+ n5 \9 }Just like the first Step
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# D& j/ D" v, i& p$ x4 vs 5 8 k" X5 f9 p* S5 @, q
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if 4=5 6 is the fake one
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$ {. m' r3 _+ n: N) Z2 Q3 oif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤) d! ~9 z# _$ G7 t: |! `& D) R

' v) f/ x' G; K; V. L2 h8 \Group A: 1,2,3,4
) c9 K1 T- ]+ A! A. b! b% QGroup B: 5,6,7,8
- ]9 p6 q1 [0 l" t/ b. @6 lGroup C: 9,10,11,12! w, S: k; P% b0 S: j9 s8 [
Group D: 13! z8 k% I' v- `1 Z
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Round 1, Y3 ]8 c  _$ I+ O  ^( A0 M# I
Group A vs Group B3 ]% k% _5 s+ W! Z
如A and B一樣, 即較輕一粒在Group C or D
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Round 2) T3 K5 R/ v, t, e6 {0 K
再在Group C拆成:) |( |, C4 ]& \9 r
Group Ca: 9,10
0 Q) P0 }; d. q6 GGroup Cb: 11,12
  H0 f) W: s) a. ~: Y然後再秤, 如一樣, 即13為較輕一粒.- q3 u# y+ z1 r4 A5 z9 N0 S& ?

1 r7 q  M. Y5 i如不同, 即較輕一組有一粒較輕波子在其中, % [$ V5 h5 ~. k. F$ d0 w- u& l) ~/ e
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
( l( I' j; V8 h2 E$ d5 N8 CRound 13 R3 u- s) H1 D, Q7 g0 @' }
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
1 N$ q0 a' f2 N, H* p0 c- }' o9,10 vs 11,12 = 9,10 < 11,12
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" P6 b3 C* D; J6 x3 S; IRound 3
( q! a  h1 {, J: i' ]9 vs 10 = 9 > 10' O6 @' a( a' [% k" C( p

& z  n% S3 I0 \0 S0 e1 {' |6 {3 jThe answer is 10.
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* r" J5 k. {# z

. `; I0 t5 s  R9 h8 j' Q; FRound 2
2 _+ n3 q1 n1 e" u7 o. n5,6 vs 7,8 = 5,6 > 7,8
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" _6 X" w4 ?1 F# ]# IRound 3: C+ p8 I+ [1 B) B( M2 ~
7 vs 8 = 7 < 8
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6 o# U' G" Z, A" _! @' z0 \The answer is 7.
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" A$ U! ]+ Y  @6 ce.g. #3 假設13為較輕的一粒" U0 O. U' C* v# u1 u5 w' c& R& g3 T' a
Round 1  V) G# a. H2 {" c4 r- W3 b  f
1,2,3,4 vs 5,6,7,8 = equal9 _7 X; S* D: G+ r
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Round 2
( p" f! }1 \' q/ y$ n; M4 m& T9,10 vs 11,12 = equal
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No Round 3/ ]$ c5 f- ~$ K6 j/ L$ Z& \
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The answer is 13.8 |& ^. X; L( {; h/ I# }- C
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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:
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0 T6 c$ C: M0 n# k1-6 vs 7-12
' j- |' U/ Q  ]if 1-6 = 7-12     13 is fake4 u) `" n& L% k, a
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if not
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Weight the 2 time ) V: a8 d: Q) F! J, y# q8 r8 n2 P

3 V4 |) d, Z' HSuppose 1-6> 7-120 \1 [, g$ p9 d

( _' r4 T1 C9 C) Y8 s9 v1-3 vs 4-6 % J8 C! z9 X: B, M
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Then Weight the Third" X6 `' @/ b! X* {/ D% y; M- k
3.& r. J0 _/ z4 T& L- Z* m
8 h+ L' c" i0 u) z
Suppose 4-6 > 1-3
: b/ c) A( ^0 k( u9 E" I; r
0 w4 z3 ^+ G2 VJust like the first Step
  |7 V0 ]% n4 J% v
% f8 K+ I2 \) q9 {! t+ U3 P4 vs 5
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5 f# W9 m/ l2 ]' t$ fif 4=5 6 is the fake one ) s( t* k/ u& C3 {

2 j+ H7 ^5 a% N! `if 4>5  4 is the fake one
5 ~3 ]; p+ r" b; K- n( p" Gand so on......................

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. A; {% V. U4 G問題第二步
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  y" z9 ?  O1 _( \  T0 N1 u7 |7 PWeight 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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$ ]: R5 w# U5 B, I你第三步点去搵 7-12 边一粒???
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$ q# \; k$ s0 ^, T, ^' x問題第三步
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Weight 1:  1-6> 7-12
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4 L1 |3 G+ ~3 V# u% SWeight 2:  4-6 > 1-3
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5 b( n9 Z  N8 r3 ]1 A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