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: p, h# j9 E5 \3 I. t3 {( Y+ z

/ C4 [  N0 z2 N『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)。6 ~0 h6 ]  X: `! f! ]5 ~& L* k
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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$ ~% ]* m' ~. L% _9 y% S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) R1 G; C* \+ K9 j7 E
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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 _- _; M. R! P7 k" y4 m) ?/ G
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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:+ `; X- ?! ?; F& B
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,5 C+ k" W  j3 C
等我搵下仲在吾在) n8 z; K" J3 N6 @% P( z8 I$ _

9 @, X; V5 w2 Q# w當日用左37分鐘答１２粒波子，差７分鐘才合格。
! h4 \$ g6 r9 a13.........& W3 B' ?) j4 w/ |

# V. `8 j5 o8 ~/ j( I[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
' N8 T& ?& @/ M, S5 V' r" y6 S+ ^1 ~. y3 L: g7 T7 o: r- L! p
我以前畫左個chart去答,
4 U  P; f% q. U* W& g$ @( {; ], h等我搵下...

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) E  ~4 R8 s$ t) l6 z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:( T" i! K- T+ ?3 f% b8 i
唔識隱藏...已經諗到..

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( j3 \' F- s7 O+ c0 R: Bsor !!!....e加改左% v+ \4 I7 q& P# ?; q9 A" G

4 H/ y; T, ^# r3 s1 O: J( 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:5 _0 x/ g3 Z  L: B
相信e條題目都有吾少人玩...

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! Q3 b) B7 {3 xPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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9 v7 x3 @- E$ z# YThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. w/ b2 t; D; @6 Y

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.& u7 X) p; r5 p* _
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Thanks

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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

1.1 w/ i( h! D6 U  H& Q
1-6 vs 7-12
7 _) a! _. X# ^if 1-6 = 7-12     13 is fake* W7 Q  }( S1 M! E) h

- Q9 S  X  S8 T1 [& `+ E. \if not 5 i9 ^$ _7 j3 h# f; ^$ M, |% a

0 L9 D) j  H( W+ I  bWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 9 S5 E- `4 Z( y3 a
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Then Weight the Third
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6 ?$ Z3 _/ I! nSuppose 4-6 > 1-3. e' ]( R* q" c5 ?
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Just like the first Step  L2 D9 o! I& s, ?9 J1 _6 a

: b7 I1 _: D! U) t& g: l4 vs 5
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; r/ o! h! ~8 G/ R& G! l" I2 v4 Yif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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+ @' `  c$ F6 c/ E; [" Iand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4( ]8 \' m2 U/ z$ g
Group B: 5,6,7,81 S% D9 S( `. K* s$ \5 `
Group C: 9,10,11,123 L# w* ~$ Y- F+ P* S" n" E
Group D: 13$ P' w7 d# C* P3 I
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Round 1/ J" O( W9 b- C2 X
Group A vs Group B
* r" i$ f& N: Y8 M如A and B一樣, 即較輕一粒在Group C or D/ F+ q! L- C0 ]: W
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Round 2  g# L1 Y# \! T* \% ^$ `3 G
再在Group C拆成:
9 }/ g1 z, ~. u9 @/ lGroup Ca: 9,10! I( c/ U# B6 S% R  A
Group Cb: 11,12
7 O; r, ]9 _, f然後再秤, 如一樣, 即13為較輕一粒.
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" A- q& ]# P$ M: K4 t如不同, 即較輕一組有一粒較輕波子在其中,   \3 F1 g& |$ O& C: Z+ W* i
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
' H: k+ C" P4 d/ XRound 1
9 n( z! _& E# B3 k! @) F! D1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( T8 K5 i$ c9 Y4 c9,10 vs 11,12 = 9,10 < 11,12
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; C; {9 M1 L& _0 u+ F, hRound 3
7 o  {2 t! X/ X8 x9 vs 10 = 9 > 10
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- u, }1 c( J2 G8 fThe answer is 10.
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e.g. #2 假設7為較輕的一粒
) {: L% a. g* j- _+ mRound 1
( t- V0 i- @5 A4 V6 S+ h1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ o2 V$ U* [, j' r- N! Z. w
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Round 2
9 T) H' |  b7 @! I5,6 vs 7,8 = 5,6 > 7,8
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' A8 k- {$ y) ~+ [Round 3
% |& f1 m1 K& g. E7 vs 8 = 7 < 8* e! ?) s9 Z" Y8 R8 ^* A

# e/ i+ h8 k  pThe answer is 7.$ d$ M7 c5 _, Y( [8 [5 v

7 t* \2 Z- Z, f# h+ _7 ~2 ~3 a2 je.g. #3 假設13為較輕的一粒; k- q0 R/ d1 ^8 V5 z+ {- s
Round 1( [' b: d# Z, _4 S- Q# a- @: ~# s
1,2,3,4 vs 5,6,7,8 = equal
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7 Y! S, P, k! M4 G0 v5 W) U! vRound 2: y& B$ C- i! b  E( I; R6 x, m
9,10 vs 11,12 = equal) Y* Y7 g' }$ _
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No Round 3; j" J1 n( U# g4 z

  L; j6 G. T2 qThe answer is 13.
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唔知我答得正唔正確呢?!
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' V6 ?6 |3 \' [! p, ?& G[ 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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1-6 vs 7-127 N" o! i* m/ r! B& a
if 1-6 = 7-12     13 is fake2 p/ J7 o4 r" Q, D# }! G

  M1 L/ i. J3 L9 P  Tif not 3 E) k% V! U8 j8 [* D) c9 s$ g

* V) R' Q. d% Z! KWeight the 2 time
3 x3 g/ v6 m1 D+ J/ g6 V0 o& u- b$ S. x  ]& }/ U
Suppose 1-6> 7-12
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4 Z( Q1 {" r# M' P1-3 vs 4-6
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( J; U' f9 F" \+ F# VThen Weight the Third0 k4 _9 P- l: c$ Y0 X
3.9 ^. Y7 X  w  A: u; @
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Suppose 4-6 > 1-38 E4 {- l6 y0 l5 F& u8 |
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Just like the first Step" \+ N9 p5 w0 ]& t
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4 vs 5
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4 _0 b* D( B) ]2 E1 hif 4=5 6 is the fake one
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- S9 P* |$ Z( A" L; n' ^if 4>5  4 is the fake one
- [9 ?$ F& m1 u9 k' r* wand so on......................

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" ?" x' O% Y" H5 N/ ~- U9 M8 Y+ Y問題第二步' M- D4 ]& J& L4 K( m7 I/ y
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Weight 1:  1-6> 7-12
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8 D  @  T. R/ sWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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; G% h) v1 W& W' k你第三步点去搵 7-12 边一粒???8 _3 H9 K, h/ B/ L4 J/ P

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問題第三步, Z7 i/ x& L! d/ A: Q- \

/ q5 o9 C6 L, q* ~2 pWeight 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