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 s! c  O5 ~- C3 _『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)。
! i( d9 }- x5 x  o9 @& 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？』+ a, L! X: }8 f
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注意: ' S# d1 K( ?( g! l2 Q4 x
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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' h1 @5 S3 R6 D( ^9 |& Y* W9 ~
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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2 R0 P+ ~: Q2 G( k1 N

4 P( C# l# Q& K! }6 Q! B* f1 s' y& ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
9 `3 I! L% Z( S% o4 G9 j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,. ?) |4 x: a2 T1 M$ D; {# d
等我搵下仲在吾在
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; G+ w; P3 b2 A( J: q& [當日用左37分鐘答１２粒波子，差７分鐘才合格。* K' A& v7 Q/ ]: L6 x" U
13.........
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$ ]5 @' W( o  w$ d( A( x' p# [) o[ 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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, q- @3 d1 d9 P我以前畫左個chart去答,
# `6 q8 y, I5 |' |2 x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:) b8 q7 s2 z" ]' E, W( s7 n) D
唔識隱藏...已經諗到..

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8 I) ~" `! `) }- P) \$ Isor !!!....e加改左7 y( h& m  n5 R2 h' u) Z
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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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" R  U$ g( ?# b' ]$ `' [2 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:: |1 A; H9 f- C. P
相信e條題目都有吾少人玩...

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( a$ q; W- z6 KPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 d# i; a9 M& @7 r$ p
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; U" c9 H' R) Z4 S3 I
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% h0 c0 Y4 v& R3 u, Z( hPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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! w1 m5 W' }3 \/ {3 aThanks

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% A7 [2 Y. S( C* _' ]' C( ^不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.  R8 ^& ]9 l  O# T/ `$ j" x' `
1-6 vs 7-124 j; M) q: N# A+ x" T. W
if 1-6 = 7-12     13 is fake
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if not
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! Y! ^! j1 X8 xWeight the 2 time
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, x8 z7 y5 V1 u9 FSuppose 1-6> 7-120 T9 d+ P5 p7 R4 H+ i- d# K

. `. K5 U  Q8 V( a& z0 H5 \$ d; N1-3 vs 4-6
7 e4 h( w8 n) X) k8 r( q1 k4 Q3 ?- Q$ k1 i, K7 u( D: g# P7 ]7 B
Then Weight the Third3 t! i) R* M5 g/ l$ O) L( ?
3.* _4 Z3 @2 |/ o% S/ K, f9 S7 H
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Suppose 4-6 > 1-3
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7 m5 ], A! W; T& Y+ NJust like the first Step
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4 vs 5
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% p+ a' A' K& h9 g2 eif 4=5 6 is the fake one 8 E# |( \4 y/ O3 I2 `
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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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% W  ?, M$ p9 b1 s1 n0 O# iGroup A: 1,2,3,4
% \) U& o; q, Q* y! XGroup B: 5,6,7,8
" j4 S( c3 C% w& T: c6 jGroup C: 9,10,11,12
* v$ \( _/ z' |" dGroup D: 13
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Round 1
3 _) U+ ^. a- I. G/ {% ~Group A vs Group B/ l& p. g9 o, X' [% ]
如A and B一樣, 即較輕一粒在Group C or D
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; r1 P: K/ z, ~  e1 z5 vRound 2; e" \4 l( M$ H1 N1 q( U
再在Group C拆成:
; z0 L( b  {& r0 R! e8 HGroup Ca: 9,10% F2 R4 f% F6 V# E. d
Group Cb: 11,123 B) z& M$ s: [4 p7 q3 \
然後再秤, 如一樣, 即13為較輕一粒.0 q" b- E/ L+ N
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如不同, 即較輕一組有一粒較輕波子在其中, 7 D0 a: Y/ |0 ]/ a
要再秤, Round 3, 之後便知答案.
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) W. C$ K+ Y2 l4 h! T3 je.g. #1 假設10為較輕的一粒/ U# `* W  d- g9 @& G" [
Round 1
0 ]% E  Q. _1 R: T, q1,2,3,4 vs 5,6,7,8 = equal
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Round 2
* d) v! W# e( C6 \9,10 vs 11,12 = 9,10 < 11,126 J# R8 A: k1 R! v4 k

  {/ e- w" Z3 N% g3 G5 A) S% XRound 3" }5 [! J- q8 f' E8 `
9 vs 10 = 9 > 108 F7 b( O; T  W2 ]7 g% }
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The answer is 10.7 Q( {+ ~1 m; p* L) w
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e.g. #2 假設7為較輕的一粒8 A! \$ u4 Y% U4 s* v+ u
Round 1
9 e+ M$ f& r: R. [1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" W: a, K2 q+ D
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Round 2
1 r; d% V8 y+ b0 [0 Z. l5,6 vs 7,8 = 5,6 > 7,85 W( Z8 q. G* M4 I2 F4 h

9 L) D- X& y% c' o) {1 R4 J! TRound 3
7 s0 O. Z8 @# l1 D7 vs 8 = 7 < 8. a, K- a4 w2 S1 j* u# K
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The answer is 7.: O: J# ?" F* M% M+ D$ x
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e.g. #3 假設13為較輕的一粒
/ a6 q! p9 P4 {" \9 W6 H, ~Round 1
% O  t0 \+ {. j, g1,2,3,4 vs 5,6,7,8 = equal
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Round 2
2 S- l+ }+ O6 l( j. [# _% [# S9,10 vs 11,12 = equal: |% Q% \* N( k( h7 K

7 i6 ]. s7 ?. jNo Round 37 q- o, u( I% j' `) \3 `. s
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The answer is 13.
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唔知我答得正唔正確呢?! 7 l0 W# d- l# L0 U  W8 I" Y' i
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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:
% f' a* W/ X- ^" O1.3 L$ O( M' G/ h2 A2 e4 y( Y
1-6 vs 7-128 i0 \5 {& b9 s2 G
if 1-6 = 7-12     13 is fake
, x" {( Y" ^6 M9 i* J, W' K  ~2 L7 {0 Z  h8 ^. m! I3 j% Q- A$ j
if not $ t8 f; U& _+ l: S
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Weight the 2 time $ |' ]! z8 L- H+ Y! ^

5 e2 y$ U. b$ a& k# `/ p8 ySuppose 1-6> 7-12
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1-3 vs 4-6 1 v. I' _, r3 d2 J$ q; {" s) T
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Then Weight the Third
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7 S) e: c1 f; w4 B9 C5 h4 y3 X- O$ l( v) L! u/ C$ f& N
Suppose 4-6 > 1-3
2 S# I& q3 d7 i& `1 M! |1 F. Z! m" O: X" o  z# o/ A% u
Just like the first Step
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4 vs 5 $ |3 Q: q6 U- x  P$ T

+ |7 j/ X$ X9 V$ b+ U: yif 4=5 6 is the fake one - {$ P- i; r$ s; o3 ]% l
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if 4>5  4 is the fake one
& W/ `  W2 X7 M6 iand so on......................

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. p9 Q+ H6 Y" G/ w問題第二步7 K: e: q% e& M  J% Q. V; x

) F' `  ]8 G8 fWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ s  d3 r1 i& y+ F" E. N( h( M

$ c: ^& t7 R2 o9 D4 \3 y5 O你第三步点去搵 7-12 边一粒???
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8 {& U) @3 @( L問題第三步
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, D" z5 _3 E- x5 rWeight 1:  1-6> 7-125 t. c$ N3 E$ {( b; D6 r+ s' r
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Weight 2:  4-6 > 1-3 , U5 p3 R" B$ T, |9 ^% C( x3 L" q
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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