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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# |2 ]: K, F5 e7 Y『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)。5 [8 l! }) P  e: N2 T
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？』8 s1 M" V9 M+ @' @( }  D, z4 P$ G

. }+ Y/ O$ |% b% n注意:
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; [1 h$ @( t. d2 w8 S% o5 [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 F+ b- v/ v2 V4 T6 N5 N

) j) \' i0 X, Z, h4 _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- Q) S: l6 ?* A! ]& T; T

9 {2 d# {$ G- s; u+ J[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ P9 O% R2 g9 y3 t# N0 e' b' C
相信e條題目都有吾少人玩...

: a) f" Z, [3 z2 |我以前畫左個chart去答,
# Z$ g  W4 p: \  @9 }等我搵下仲在吾在  u2 y1 E' x& q5 S6 g7 T8 B

. W. R# ~5 C+ m& ]$ f8 A1 W當日用左37分鐘答１２粒波子，差７分鐘才合格。# x, U* U, A7 m% ~
13.........
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3 p' g* M+ \# @6 r7 S[ 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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) y5 [1 ?# \' T; s2 ^* c" l我以前畫左個chart去答," Z" D0 J! \7 x2 g  n4 T
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:
! X9 ?( |: Y5 s- w- T- `; q唔識隱藏...已經諗到..

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4 Z* n$ y1 D/ K0 F' \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:2 _) d% k0 c' s3 ?% X
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:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.3 t* R' V  z3 ?& U
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Thanks

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0 \! c7 B9 W" a; V" E' O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
! M1 R/ n* w6 p. Pif 1-6 = 7-12     13 is fake% n0 I# e, [5 ~6 k1 ?7 c

0 J1 [2 g; s3 A, r0 Yif not ) \2 n& M4 W- R6 a. Q' @! \" R

3 f; Q5 k+ D5 s# Q1 bWeight the 2 time 2 Q; s2 p  t, u( P) ]" k

! s+ z% x$ c; Z$ j6 s" eSuppose 1-6> 7-12
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1-3 vs 4-6 5 y1 X7 }) `5 r: i: [

# c1 {! ]% c  l/ I' l2 ]& rThen Weight the Third' |. k% H# N  j- k
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Suppose 4-6 > 1-3
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# {8 y' K( A& ~* l9 s3 JJust like the first Step0 P5 o6 z2 U, I0 C8 b. V
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4 vs 5 2 i( V( y% ]2 e7 x

9 C  b; i2 ?; U- j' [; Gif 4=5 6 is the fake one * D/ ?5 Q, ~2 U, s- b! f
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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
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Group A: 1,2,3,4
. j% e& _5 [$ eGroup B: 5,6,7,8- A" g2 G* G0 J, {5 Q0 p
Group C: 9,10,11,12$ W# k+ R$ ~0 g. e  z# @* O+ @
Group D: 13
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" {% I! B, j) d4 A9 I9 c( pRound 1& T$ H( b# N( c
Group A vs Group B
" [  U. v) t* O如A and B一樣, 即較輕一粒在Group C or D
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Round 2
* c2 |: {8 Q$ s4 w* m  M; }9 i再在Group C拆成:+ Y: d4 E. j& Z
Group Ca: 9,10
7 S& }% f  K1 V' k9 ]Group Cb: 11,12# I$ S" G8 i) h* _+ y! C
然後再秤, 如一樣, 即13為較輕一粒.: `9 n6 r/ ^& n. N
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如不同, 即較輕一組有一粒較輕波子在其中,
% e6 c5 Z2 P! Q, X要再秤, Round 3, 之後便知答案.
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, @# m9 \% W2 m2 |7 se.g. #1 假設10為較輕的一粒' `" _* Y% ?* A) X. [
Round 1# V7 [. u6 j* U2 u
1,2,3,4 vs 5,6,7,8 = equal6 f; U7 i. |, ~# g7 U
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Round 2
( a# E7 O  i& H7 _* J8 J. {$ H0 B9,10 vs 11,12 = 9,10 < 11,12
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Round 32 h9 M% P( ?+ y* a! ^8 \7 E
9 vs 10 = 9 > 10
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The answer is 10.- P4 Z8 G4 ~" R

0 ]: \$ t* I( Oe.g. #2 假設7為較輕的一粒
  o. V1 o8 c0 ?Round 18 f4 e3 B4 }% T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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: S9 Y) g: T, v2 ERound 2
( y# }: P, P8 A6 Q% e# c7 E5,6 vs 7,8 = 5,6 > 7,8
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: U. r; I% ~9 V8 [& @4 z0 |, wRound 3& c# F# e9 h! P0 @8 d$ u: B0 B
7 vs 8 = 7 < 8& ~; M8 E3 @0 x! [

1 ]7 h! H: D4 T; o8 i. kThe answer is 7.$ S1 \( T+ D" v- Q4 [# r1 w+ i' Q
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e.g. #3 假設13為較輕的一粒0 [/ \: u, p) j) v! a
Round 17 X$ ]# Z/ Q1 L1 l
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
+ A2 T0 a1 z2 B, _6 \8 p( x; J( G% g9,10 vs 11,12 = equal
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No Round 3. a+ ]% N7 q( _0 G
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The answer is 13.
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唔知我答得正唔正確呢?! & Q4 ^" u+ m3 J9 R# D4 b0 I1 q

/ G4 q- Q) _. D8 e8 I- N[ 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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+ G3 [! p0 O7 u" i9 u1-6 vs 7-12
* K1 Z( t6 U) ^% Rif 1-6 = 7-12     13 is fake
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if not
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; g0 o2 Z' f4 z5 b) a; vWeight the 2 time
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  ^9 v. v0 k, }2 K( I: d/ j  uSuppose 1-6> 7-12* m* o9 p! R5 ^3 Q9 ~5 X

" H7 U1 C6 W+ S8 R1-3 vs 4-6 5 m9 b9 T$ F$ @+ @0 x$ ^% g
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Then Weight the Third
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Suppose 4-6 > 1-3' I4 Y9 j. ^+ Z$ H* D4 A" v

! \4 A$ G# v8 v2 y" v+ K; |6 dJust like the first Step
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4 vs 5
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& ~" _* [4 y* l+ \+ N. jif 4=5 6 is the fake one
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if 4>5  4 is the fake one
. R, r0 K+ f) y( Fand so on......................

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3 |# r) A( v5 _+ W% M2 R4 s問題第二步
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$ L. N) Y( E% c6 ^# ZWeight 1:  1-6> 7-12) V& i7 \0 L/ L0 w+ ]; _

: ^! r" \" q; y. ~3 W) ]- SWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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! y8 J9 c# }. _5 _: A問題第三步, {9 v) [& u. w7 ]6 g9 F

# _- O: i) u# B' VWeight 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