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)。! J3 t9 S8 s* 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？』
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" M( T. V2 B8 }: Y  j# |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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1 |: `: e" ^' s( J2 J9 ^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 B+ _6 a1 j0 K' F" L$ c& h

1 C; _( N* k' P# _6 S* A9 s[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 Y& h; |7 K1 J9 Q) \. l, o0 y0 r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,; H2 @! O: ?1 K8 Z
等我搵下仲在吾在
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. N' g# I1 g8 w$ A; h當日用左37分鐘答１２粒波子，差７分鐘才合格。
5 R3 M) q. @# c' N13........." T8 ^5 i, k3 F7 r; o/ x/ n& s
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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:* D5 z; s9 P; a: x; l9 V

# a: N3 Q" D: m我以前畫左個chart去答,
/ t$ a8 k" m8 s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:& }% G& g8 G1 l
唔識隱藏...已經諗到..

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sor !!!....e加改左, y# V8 R& B4 ^6 T& M, M/ Q
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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:8 d" {1 Q) m- Q: t2 n- U
相信e條題目都有吾少人玩...

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& M" @& i/ v5 v1 ^PlayPlay, Let me know later who has the right answer and I will add points accordingly.4 ^- I  B1 Q/ T0 `) f
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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.
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Thanks

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: ?- y# c$ S+ S不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
+ l7 j- d( ^6 f' s7 X1-6 vs 7-12
* ?& q# D! t2 K! H1 f1 S( k: p( wif 1-6 = 7-12     13 is fake1 N+ Y, Q4 k5 \6 r! M$ }0 i( ]( J
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Weight the 2 time
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Suppose 1-6> 7-12+ J) I7 D% B! W, m
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1-3 vs 4-6   Q' E3 X3 p$ A) Z5 P

4 ?+ T! S* I  v4 e/ g' PThen Weight the Third, V' l& L. z) F
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Suppose 4-6 > 1-3+ c- ?* {0 ?. t

% @  X0 v( L# ]  i! F1 JJust 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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& F  b" O7 H1 K7 \2 D9 H" Fif 4>5  4 is the fake one / L& [& D5 k5 U. O
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and so on......................

hello1997

分3組4隻波子秤. g3 I) E) j: _) F
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Group A: 1,2,3,4, q7 \; v- w% _9 J
Group B: 5,6,7,8: }- ^5 v# X' h" z9 }% h0 h
Group C: 9,10,11,12
( Q- R' P8 L4 P: [% ^' }* b% UGroup D: 13
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Round 1" z: V3 s: R, D3 Z# O
Group A vs Group B
$ Z- s) {1 Y/ U7 E* P如A and B一樣, 即較輕一粒在Group C or D
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Round 2
) n; X4 r$ C* [7 w  Z8 j( a再在Group C拆成:7 n. \; s+ {( z* q- c, g* A
Group Ca: 9,10
2 x  F8 Q6 _. n6 N8 ^1 t) OGroup Cb: 11,12  Z: B1 w! G2 Y) a
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, ) \& M8 P) Y5 O
要再秤, Round 3, 之後便知答案.0 ]! C$ w% p" c) G
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e.g. #1 假設10為較輕的一粒
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% r4 y% M. A* `: e5 ]1 ?1 o1,2,3,4 vs 5,6,7,8 = equal
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Round 2
' P1 `( O' e1 }) e9,10 vs 11,12 = 9,10 < 11,121 W8 n  u) m0 i
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Round 3
* |  U3 M7 D  Z( m. D. Q) I9 vs 10 = 9 > 10
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The answer is 10./ R# }- w  y& [  O

+ R& E5 l/ O# K& ?) ]. k. se.g. #2 假設7為較輕的一粒2 }$ k3 U6 x6 ?% A3 U9 v
Round 1
9 F( e, u9 ^: Y. p, k6 `5 Y2 U, a1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
: \. d8 l! {0 ?9 ~- v" W: i; n5,6 vs 7,8 = 5,6 > 7,8
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( }, i1 n, a, B0 L) g4 x! MRound 3
1 k( r# p6 {6 k7 vs 8 = 7 < 87 w5 V8 G) G# @: U& O& `2 |% ~
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The answer is 7.3 E8 V1 [( k7 h. q- l  x! k# ?% C
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e.g. #3 假設13為較輕的一粒
( m7 f4 w: P5 L' b- g& B/ I) v: ZRound 1- h4 c2 M( Y( ]) l
1,2,3,4 vs 5,6,7,8 = equal
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Round 2$ a- i- F- A% f! |
9,10 vs 11,12 = equal8 A: B% A, u+ e; [7 L6 @

( ^( j3 X9 X+ t' x# RNo Round 3
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2 M5 {. o8 u( vThe answer is 13., M& G7 V: f: Y
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唔知我答得正唔正確呢?!
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; ^" D, X4 |7 g5 ?7 d. g$ R[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:: ^9 Q0 M2 v; X! i5 v
1.
; ]2 Y! l+ T3 ~/ d1-6 vs 7-123 X$ p8 M, `& `7 O1 p
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12% Y2 g" J2 n8 D
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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' }' @" X) N2 ]  bJust like the first Step
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: J: \0 @- R( Y6 q4 vs 5
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if 4=5 6 is the fake one 2 H& {. c  ^3 c& d! z" O  V- ^
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if 4>5  4 is the fake one
7 P2 t* h5 N3 i. \8 tand so on......................

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問題第二步7 {. D! W' S' @5 m% \& {  I& b
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Weight 1:  1-6> 7-12, F/ _2 b3 t3 O2 o. K! R$ x' B
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ U) k( Z. |) @% t" U" }2 l) x6 N
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你第三步点去搵 7-12 边一粒???
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========================================
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2 W* o) f2 s& u# L& l  o; n問題第三步
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. [) F( J1 r! j; v2 ~# Q6 vWeight 1:  1-6> 7-12
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& Z% `0 f$ F; k8 v9 m: T( VWeight 2:  4-6 > 1-3
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: O4 B9 q3 Z5 r+ J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