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 W) [" Q; Q" P! i6 f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？』4 e: ^) Y' }* f! a5 ~( X6 G

9 p; `" E. E4 U2 r% |  R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
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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& U2 @. m$ K9 ~" o3 Z, Z
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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:
) [3 d/ u5 \& }/ Z/ C相信e條題目都有吾少人玩...

$ U0 J8 J$ K. L% ~( ~我以前畫左個chart去答,
- K  M" K. G4 X0 }1 G7 [( G. f等我搵下仲在吾在/ J1 S* h4 H* J5 O- K- U

- t9 l5 U( H6 ?( K2 U) c/ R當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ I7 f* O+ R' o" L  n# w& S13.........
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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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* z" U" u% X0 f我以前畫左個chart去答,
0 k" a; N* ?0 x  b4 }# ?等我搵下...

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! t6 M$ _- v7 t, 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:
. ~3 B9 w5 {6 E! n唔識隱藏...已經諗到..

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; f4 P! g' Q3 i& H3 Qsor !!!....e加改左3 ]) L5 r$ `# J) w4 P+ i/ p$ k. F
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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* b) H) p) R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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/ n9 Y2 ]; }% S  ?- Z  z$ uThanks

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., \5 Q* Q4 L+ _6 v: @

" z' W, |( J/ o2 tThanks

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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

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1-6 vs 7-12
) Z  `: \  H, t2 sif 1-6 = 7-12     13 is fake
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if not ' j' s' g8 q; y/ K0 t. y* k
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Weight the 2 time 7 p( F9 a. q( l2 X) C2 O
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Suppose 1-6> 7-12
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1-3 vs 4-6 ! h9 I+ w  _3 X6 B7 n

/ g0 O  P: H8 k6 |% E/ E8 kThen Weight the Third3 B( S' i- U% @: ?
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 9 B  F; B% a# C! l; F  M  I, }

, C3 I( `2 ?* [! s& n6 xif 4=5 6 is the fake one   W  r" N6 @. D3 \8 p- i1 ?) D

! f1 b2 F6 Y5 Q& w( ^4 Eif 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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' C, n5 K9 W  }' rGroup A: 1,2,3,4
" R  k9 a7 v% \+ uGroup B: 5,6,7,8
5 |* a7 c) p3 C: \Group C: 9,10,11,12
: F" w9 q9 W7 O' hGroup D: 13
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Round 1
7 Q. M" r! k; L8 j& AGroup A vs Group B
6 f* U* l7 K& X; l% b) q如A and B一樣, 即較輕一粒在Group C or D$ g- v1 f) q7 q% q7 J% a1 ^, H; l

7 U, H- B* i' l# v; U" L; zRound 23 ]; s1 H; K4 X  ?) m* v
再在Group C拆成:
( o8 d# I# }. G. zGroup Ca: 9,10
4 \/ |% f$ h! I( f5 k" }Group Cb: 11,12' b: Y* ]7 o) e9 n. J
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
& H% P0 n, s$ K3 A要再秤, Round 3, 之後便知答案.. g5 M8 t+ S5 S1 v
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e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal7 k" J- a- f1 [4 [
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Round 2
4 `& H& x, d1 A: o: v- ?9,10 vs 11,12 = 9,10 < 11,12$ t5 R- I! y! g3 o2 m, D4 M0 W

$ G! H, c: D- Z; w9 p% O7 zRound 3% p$ e0 q# l+ a  ]  P
9 vs 10 = 9 > 10
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& \) M6 p7 t6 x; n( n) U  I+ ^The answer is 10.
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( w8 {. x, d7 ye.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 > 5,6,7,81 Q3 K7 w' J6 D
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Round 2
8 L7 {  n9 s; Q5,6 vs 7,8 = 5,6 > 7,8+ Q, O$ R2 x. @
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Round 3
3 f+ S! m$ v) v9 p5 d. s4 S7 vs 8 = 7 < 8
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7 D. s# m" m8 J- PThe answer is 7.
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% X6 E8 w( `% q9 I" re.g. #3 假設13為較輕的一粒
0 m5 N( P4 K+ S% rRound 1. }1 }2 _7 }$ [. X" ?- q  b( w$ R
1,2,3,4 vs 5,6,7,8 = equal" \. s( v  |( @! p, A6 D

4 p4 B3 Q' {/ \. u9 R6 x- I) f+ [Round 2- I/ R) \- S5 Y( i; r5 _
9,10 vs 11,12 = equal
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No Round 3& J6 T+ a( y  G
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The answer is 13.& [# `* S8 c8 \" O
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唔知我答得正唔正確呢?!
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; A% T2 U2 P: r  ?4 G, U3 A/ [[ 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 k; h" j+ c/ j% g' }+ C1-6 vs 7-12
4 Q# r5 o" b) m1 Y+ }$ O  @* x6 m* }- mif 1-6 = 7-12     13 is fake
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Weight the 2 time 6 K. Q8 `, P1 U% H3 Z
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Suppose 1-6> 7-12
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* [5 C5 {& ^$ S- @+ O2 }1-3 vs 4-6 . r) Z$ G: w% e- P: H. U- |" C

7 x5 Z% L" g, O$ cThen Weight the Third
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" H" l/ J; r- J" ^Suppose 4-6 > 1-31 I  p& G$ E8 {6 i$ Q) o7 b$ \
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Just like the first Step' A$ _# F9 O+ T6 P, a5 V0 V9 f

* D% y2 J) C9 n; }) [) s8 T4 vs 5 / n( M/ u) q1 \$ ?
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if 4=5 6 is the fake one 2 n6 Y& B6 w* {6 U9 y0 J) @

- b  \  ^0 j8 ^: x. q# Hif 4>5  4 is the fake one
! y9 y& ~7 [0 M7 E3 \; g! pand so on......................

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5 t4 O) m1 a6 C0 b/ E! N" B問題第二步* P4 g# o  N& n9 j

# ^! i% X1 {4 V2 X! V5 T* jWeight 1:  1-6> 7-12) I2 q, ]( `$ }% N  s( Z

3 C7 U8 T/ R, E# y8 }Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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4 M* `9 Z" K/ J5 P8 K! Z你第三步点去搵 7-12 边一粒???
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/ y+ b. j7 E! c. ~========================================
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問題第三步
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Weight 1:  1-6> 7-12$ D! I7 N4 c5 y
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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