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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『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 z. Y5 ?: S- r. @$ P' 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？』0 R, c2 G) \8 P5 x1 q) K& C1 Q
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注意:
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! }6 u7 ^3 q  F; y( B9 m( `8 Z1. 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2 a9 }  T* K$ u5 G
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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
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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:( S0 F" @* c" X1 v; E9 V1 h5 x6 `
相信e條題目都有吾少人玩...

) }* S. S! r9 G& K3 g我以前畫左個chart去答,( f. S: y" Q# X/ `0 [3 d3 |2 J8 O
等我搵下仲在吾在9 P4 r* U/ D0 [. C

# L  S1 f& `7 m* e當日用左37分鐘答１２粒波子，差７分鐘才合格。
% d" y" b4 G; l, D13.........
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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:
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/ N  n. R; i' y# x3 q8 ?" m: c& @6 h我以前畫左個chart去答,* m* X" w/ @3 ~$ H, G
等我搵下...

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6 E  M7 ^) |/ e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:
/ u3 C  Y0 ~! m7 W$ i唔識隱藏...已經諗到..

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) |/ I9 q1 W# U2 f# hsor !!!....e加改左- k1 Q8 O4 G! \, R% Z) `

# d  f8 S  q4 t+ V6 m- v2. 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3 ?& P& e8 E4 b) X+ X4 t  N! P
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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:' h% B8 r( }1 u! q# M- y
相信e條題目都有吾少人玩...

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/ L- X% P3 n6 @" E# CPlayPlay, Let me know later who has the right answer and I will add points accordingly.5 U7 S1 y# k8 F5 T# l4 r  \7 F
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- `1 H6 B2 e- ^" M/ U& M* L

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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* l% l3 l' a- n! ?$ A: l4 vThanks

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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.
; x+ z% g7 p* X% C* V& a1-6 vs 7-12
  r& Q& f- u$ lif 1-6 = 7-12     13 is fake* B! g. p* E9 w" S5 S# Q4 y1 J/ E, n7 W
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if not
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9 S: d4 c9 P5 u( hWeight the 2 time 0 }9 D, O; U  E% w3 v

6 D, ~/ \7 y( C- Z$ P- J3 eSuppose 1-6> 7-12# ^2 a- g$ `* G) r& K5 b
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1-3 vs 4-6
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Then Weight the Third8 ]$ h6 Y( b- ^& ~
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Suppose 4-6 > 1-3( k+ V" @7 {: x4 v
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Just like the first Step  x$ V# M: Y! t. `) `. W
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4 vs 5
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if 4=5 6 is the fake one % L$ q$ [: i/ l$ n. L
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if 4>5  4 is the fake one
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0 e" ]1 |0 H+ Q. band so on......................

hello1997

分3組4隻波子秤+ y* K6 L" I2 Y) K! @! M

5 z! u7 X+ G( V7 L, v* d6 O9 [Group A: 1,2,3,4# K, c/ a  X: f
Group B: 5,6,7,8
# K1 D) o: }6 W6 y% I" n% N2 U7 [" ^Group C: 9,10,11,123 g: ~8 t5 Q  C4 ~% r1 P
Group D: 13
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* p% ^/ n4 A( u& o: ~& O# cRound 19 g- z/ c8 U: k% W5 _
Group A vs Group B2 A4 r, f# l9 O8 \2 Z) v
如A and B一樣, 即較輕一粒在Group C or D; D1 b. O3 t0 ^+ Z& P' g

  S# `! ~& _7 P; iRound 2
9 [: S7 [$ s& @1 ]# V+ ]/ _$ t4 Q再在Group C拆成:
( r" w' C. L9 H- k# `3 s" ?Group Ca: 9,10! M: P) w( i. b- ^/ m+ e
Group Cb: 11,12
; p9 O& }; U* z  A# |2 R然後再秤, 如一樣, 即13為較輕一粒.
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& |4 I2 ?# h& v2 A& U- y; O& e如不同, 即較輕一組有一粒較輕波子在其中,
1 H: D. U! Y! V7 d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- A# ^( m- E) r3 H3 f$ Y
Round 1. G( w1 o, x  T' Y
1,2,3,4 vs 5,6,7,8 = equal* E' j* x% ?5 Q; }# K+ i# [
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Round 2* h# \& Y2 E; S6 ]$ a
9,10 vs 11,12 = 9,10 < 11,12% g2 k: P  L. m5 N

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9 vs 10 = 9 > 10- a1 X; |- U/ }: v! B. q- x$ }

6 g5 Q5 H& ^, l! p: B% cThe answer is 10.
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e.g. #2 假設7為較輕的一粒0 I5 L/ _& ^8 l9 p# W6 ?
Round 1- W! {* ?4 K( X- I& Z! |' \
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* d' z3 q( B/ ]" h" W9 ^
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Round 2; g3 m! D  i4 c% [2 ?
5,6 vs 7,8 = 5,6 > 7,89 H& i9 a8 h+ p1 h% F2 K

0 X! U! @6 E: k1 a7 {Round 39 v1 O4 Z* n  {. }
7 vs 8 = 7 < 8$ E+ I6 J: N/ |5 K  i' a

% E- [  A( v& M& L& fThe answer is 7.3 b5 Z' F' i' r% u

7 h' v) b# X! ~+ Ne.g. #3 假設13為較輕的一粒
% f! Z% h% U+ u% ORound 15 k; V  p3 c6 X+ L  W0 @4 `  z3 d
1,2,3,4 vs 5,6,7,8 = equal7 c% n2 c8 R3 i) N
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Round 2
+ n2 d- r: g' t6 N! n9,10 vs 11,12 = equal4 |' c; D2 O+ \! L# O, L

; y* j0 D) d% A) }# ?No Round 3$ b+ M: @$ E  B$ }5 M! `4 @
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The answer is 13.
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( }: ]- @/ R8 w唔知我答得正唔正確呢?! 4 e1 {, i( ?; ]7 {0 g9 G

) O) J# G+ D# n1 {% s2 V[ 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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. R4 K( o9 {* Z. V# h8 o9 Z/ B1-6 vs 7-12
6 m9 o* z% H8 `+ t2 l. k3 B1 @if 1-6 = 7-12     13 is fake9 r: R2 g( {! ]0 Y. x

+ m9 b' J1 ]/ q% [- Mif not
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9 w- f6 M& l. S( p; N: X* GWeight the 2 time
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$ p: ~8 T  t9 U0 \! sSuppose 1-6> 7-12# c1 W* {: T( c: `

" h9 E/ L% G0 E" Q1 G) a/ Z0 \8 A  V  m1-3 vs 4-6 + e. }3 }7 ~; k* t, m: ~
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Then Weight the Third1 t$ h+ Q" p! E0 O
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Suppose 4-6 > 1-3$ r; T: c! [# @# h8 [9 \
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Just like the first Step! R3 @) U" ?, c8 ?/ U

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" Y2 q' x% y6 y; eif 4=5 6 is the fake one 8 e- ?2 ^9 [$ o; E! O# P$ v
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if 4>5  4 is the fake one
) H+ i. x" T2 H) [and so on......................

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( Q  Q+ y. `4 f- k問題第二步4 B/ E9 @5 i9 Y

' e  }6 g7 t6 D+ Q( W( QWeight 1:  1-6> 7-12  F) C2 Y$ i/ P8 r5 W* q9 I3 c1 l

: d* X0 P9 a' y/ G& YWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& y8 ?* n" j. q( q

% @6 x! n% r3 _8 B2 C4 t: v# A你第三步点去搵 7-12 边一粒???
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========================================3 }4 x: g: b6 B' q

% B8 {  k" m% Y1 y- Z問題第三步
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! v$ X9 g2 L1 @$ ]Weight 1:  1-6> 7-12
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* t5 `1 h. e( _5 g; ?8 b7 B- EWeight 2:  4-6 > 1-3 4 z( ^. G8 u! H' {0 J5 G: `2 \, e

3 _5 k5 R3 c9 \! ]* Y; `9 c  b/ g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