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4 q6 a# B  K) ?3 t& {5 z& d
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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)。9 L" y" \% y& x- ~% J7 U4 v$ L7 v
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？』2 g6 X7 Z4 ~& G& u8 e, d
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注意:
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/ v- h% D) M, Y4 |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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5 L* C7 |7 ^8 z: c/ u2. 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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' }& M  H$ r) G  Q4 V# X2 ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
5 P# p7 F3 O! D" l5 O" `' E, Z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,! I9 n, O8 E. s: ?) q: V! ?
等我搵下仲在吾在4 p5 G, |' @/ v' ]' i

6 O: M9 l5 s6 |4 E" f; K+ i$ E+ a& S當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ |7 z. Q' ?8 X" W13........." o0 a6 Z, [9 V  i( |

4 H( E- c: ~  J3 p/ Z" ?[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 G3 q8 k5 v9 o0 f+ Y

5 U  K- {5 f% V$ H2 h我以前畫左個chart去答,
. ?- |2 ~: B, `$ z7 E9 }4 [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:
/ r( g, O2 s$ I6 @& V2 q/ _唔識隱藏...已經諗到..

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( q6 r3 o: h6 t) Y( [# lsor !!!....e加改左
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, A& D# F- V; T* B  z4 j2. 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* `- m: r0 x: ]* l" ^4 s  f# k

) p4 X! q/ u4 k[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
, Y6 v$ [; L3 ?; @& V相信e條題目都有吾少人玩...

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' ~' ~' j  ]! i" x& KPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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: B6 z0 U4 W8 ~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.8 q# r7 k5 q% I: ]6 o& o/ l; ]
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Thanks

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, F3 R" e5 A; K! P' G: P' E% G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
2 a* r$ ?- T1 k+ A0 C* a1 ^if 1-6 = 7-12     13 is fake* ]9 N( W2 H+ D0 k. H& ^0 S

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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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# J( V+ [* Y" L7 e1 p% I+ }2 CThen Weight the Third
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7 J+ ~, _$ b: ?) \2 H" pSuppose 4-6 > 1-3& ~% v# u; e) N: |; O- H- o

1 C4 Q) C2 }; k& @2 }; m* R0 dJust like the first Step
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4 vs 5 5 M1 r) O- P8 ?. ?" w5 r0 a

1 k; o' @- K: S- k* N: I7 j2 Sif 4=5 6 is the fake one
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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9 Y8 q, @9 |2 _! @9 P  z1 I3 c; r' ^4 Q

; {2 f2 e2 {+ L! Z! _( n2 z- u# qGroup A: 1,2,3,47 L! J3 b1 _" s) |5 u# U
Group B: 5,6,7,8
: H, e4 w" {5 e% j5 a+ w2 PGroup C: 9,10,11,12
& W# m  c4 s& m" p5 _, SGroup D: 138 o  }$ Q. t+ ^1 ?" h5 u

$ ]: s. u$ k  ?* ^Round 17 t0 L' B1 P5 B/ {9 R. N
Group A vs Group B9 [. n! l/ C7 a# ^1 t- c
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
! r3 r# m* B9 i4 I* z' u$ J再在Group C拆成:. M# p1 `, n) J+ t' _' V# m) R+ ]; o
Group Ca: 9,10: _& l. x& T( `0 z) S1 j4 T
Group Cb: 11,12
; w0 N1 d# ]4 l4 i1 L7 t' z3 j然後再秤, 如一樣, 即13為較輕一粒." n: U! X0 O3 Y0 _3 m+ V" f
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如不同, 即較輕一組有一粒較輕波子在其中,
' A/ F' y! |( l/ _" [要再秤, Round 3, 之後便知答案.
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' n3 E# }' z& @) Qe.g. #1 假設10為較輕的一粒) X4 k7 S% i5 z, z9 g) N
Round 1+ D9 U9 N# e  y: |: y
1,2,3,4 vs 5,6,7,8 = equal
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1 m6 m5 C8 \( c: E# M1 [Round 2
: w' t3 C) U4 o: V& }9,10 vs 11,12 = 9,10 < 11,12
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8 o0 Y9 P' @2 j! |9 gRound 3
% r: T  e1 X4 r7 n2 K; S/ a9 vs 10 = 9 > 10
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The answer is 10.- B6 w9 l9 X, z2 `, a' X
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e.g. #2 假設7為較輕的一粒& ?3 Q) Q: R7 M: W/ U" X! H2 x# o% W
Round 1- V0 R. h8 C. X4 P9 r. X
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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) o- Z# A# F8 _/ RRound 2. s( N6 S5 ~* T- B
5,6 vs 7,8 = 5,6 > 7,8
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Round 3* D8 b" u" R7 W
7 vs 8 = 7 < 80 ?2 x- o* B1 n6 a+ x" B
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The answer is 7.
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3 _  D. }3 _# |) P& ?e.g. #3 假設13為較輕的一粒& Z; q; x9 v& X) v
Round 11 T# n8 J) H% l* L/ t- y
1,2,3,4 vs 5,6,7,8 = equal
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Round 28 x" s' r4 B- C5 C, T  T
9,10 vs 11,12 = equal
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No Round 3% o  A8 `2 b1 l# n7 S5 D
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The answer is 13.
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唔知我答得正唔正確呢?!
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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:
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. @! V! n0 D+ W. ]8 e) c2 Q* e1-6 vs 7-12
  J. `: G. d1 L3 y5 J: Dif 1-6 = 7-12     13 is fake) G6 {' v+ t  b% ]4 ~) |. m& Q3 i
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if not / R- W4 g2 H$ U2 z8 Y& a) i, i( z
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Weight the 2 time
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Suppose 1-6> 7-12
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& R9 Y/ ?1 @& Z4 N( _( R$ N- g& b# g9 [1-3 vs 4-6 0 ~* i: o, n# k8 r$ k7 v% U# g+ x
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Then Weight the Third
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' m4 a0 _1 l/ Z$ \Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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4 j+ q$ x+ I, i% b5 C. w( l0 fif 4>5  4 is the fake one
' T3 o* |# k; i1 w" mand so on......................

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問題第二步5 l$ s* c9 f# z" ^3 r3 ]/ g
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6! g# j) b+ \8 K$ H& _& R1 C
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你第三步点去搵 7-12 边一粒???4 @5 ?" W& o1 R8 ^( ?: ~
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========================================
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問題第三步
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Weight 1:  1-6> 7-127 Y6 l7 ?0 N& X5 o0 r5 S  ~
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Weight 2:  4-6 > 1-3 ' [% b7 I2 s  G

6 e3 ~: E3 |( a7 s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