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3 m+ q8 _2 ~$ _+ x3 d( E# m' A
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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)。/ c$ x' w4 Y* _  x+ ?
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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注意: ' u7 K5 N3 s0 M* D$ S$ v+ V2 M
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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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% \0 I$ i& A% V) I3 y8 Q2. 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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$ {# F  \9 `6 p3 i: R[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:2 K" J3 K. c( Q! U
相信e條題目都有吾少人玩...

2 l! N. D6 X! ?6 |+ K% i, q# _6 C我以前畫左個chart去答,
. d. l4 i0 W6 f& T0 Z" u5 j( W等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 I7 k8 k' ~2 q8 v/ C- e, |13.......... a" L! \) u& Z* h

% ?2 F; O) _* M$ }7 u[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:! K6 ~; I$ I7 k8 R" L

2 A/ q, a( f; i我以前畫左個chart去答,* z9 I7 x0 G* B/ @1 p; m% S8 B
等我搵下...

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0 _) [, L% \5 q; @# j3 T7 j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 c& ^# K8 t% S2 u6 U7 F唔識隱藏...已經諗到..

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sor !!!....e加改左
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  F0 r9 D6 N  v. `) G2. 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: C0 L3 m  f' A  i& Y3 I

: L; x8 b3 |# a& ?8 s+ V[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: L( ?- L3 Q% R6 z; D
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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0 e9 J- [9 e  j/ p9 ?1 k$ ~" `Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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" H# L& k5 M4 Q6 v) d0 mPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 \) v+ n0 e, ?Thanks

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" K& t3 n& M; [5 p6 n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
: R4 H& S" |: w* E3 fif 1-6 = 7-12     13 is fake% T6 z0 d' l! f  I: P- s

: q2 O+ L3 ?+ Y+ ?- Z  T2 Hif not
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' E1 X' X3 n9 m  ~' P6 hWeight the 2 time . z# D/ [- A7 c7 J9 k! M

1 U3 y9 {2 z4 K, K" _4 iSuppose 1-6> 7-122 {1 m% r0 i2 L

# m$ E; Z) v1 m7 M" d3 ^, _1-3 vs 4-6 8 }' t6 T4 g0 I; j( I6 }, a& Y
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Then Weight the Third- j* [. ~3 a  _: ~; x+ \
3.
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8 a( C6 ?0 E0 {/ u+ @0 d1 MSuppose 4-6 > 1-3
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" Y; ^4 L8 U+ G1 L1 ?' hJust like the first Step
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) ?2 B2 K. r' n, Q2 U4 v; ?# [4 vs 5
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if 4=5 6 is the fake one
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7 ]* a* W9 T2 n7 r; _, iif 4>5  4 is the fake one " |/ Z% ^5 ~& Q' _5 M9 @/ [
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and so on......................

hello1997

分3組4隻波子秤! i; P4 z$ K. x$ n2 z4 ]
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Group A: 1,2,3,4* _' X; ]/ O: R6 r  @) @
Group B: 5,6,7,81 j( D! C! i7 V9 d5 n
Group C: 9,10,11,12
: L, X' [. A! k# D( l% zGroup D: 13
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& t1 e! J1 S5 [' v/ eRound 1
; Z4 c" t$ I: Z- X1 eGroup A vs Group B
0 X' J. _# f! p) Q! r9 I如A and B一樣, 即較輕一粒在Group C or D
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Round 2- \- s, W6 ^; ^  S% l
再在Group C拆成:
9 L+ {' l% L' B6 x, t  iGroup Ca: 9,101 w# O; u/ r4 G+ p. R& U' A
Group Cb: 11,12
+ L9 S1 G: l# ^4 l然後再秤, 如一樣, 即13為較輕一粒., u6 M' Z, g8 Q; H2 T
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如不同, 即較輕一組有一粒較輕波子在其中,
0 N# D( \& F' [2 [, e' f, ?9 Q0 t% t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
! z2 e& \" q- [/ R* D1 ]Round 1
& f8 Y( m9 R5 Z5 G% @- ~1,2,3,4 vs 5,6,7,8 = equal- y3 _! Y8 p3 B& n/ }4 G

( M/ m  C8 o6 R1 e7 E3 jRound 25 T0 d, ~) T3 o+ l% [9 E
9,10 vs 11,12 = 9,10 < 11,12
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Round 3. C3 \' y2 d6 U. ?
9 vs 10 = 9 > 106 A5 B- S, U; C& s

4 V6 k6 W! I! F5 m, QThe answer is 10.1 d& x/ c' a+ H8 }( v
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e.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 > 5,6,7,8. P# q+ W1 ~& W' ^

/ o6 v* c/ E; ?9 \' KRound 24 n& i6 I8 ~0 |7 _. Y  C7 i( q
5,6 vs 7,8 = 5,6 > 7,8$ ~" \' A; i- Y" V( O8 {
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Round 3
) H2 B5 U' ?/ A9 f7 vs 8 = 7 < 84 S& j7 ^: u3 o  w5 z' F4 _

4 r$ M2 g. Z6 a1 \( gThe answer is 7.
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5 \' @$ I/ a: s6 `& U8 Se.g. #3 假設13為較輕的一粒: l8 v) _2 F0 _3 K  u  }& e
Round 1! p: R2 [/ u7 C
1,2,3,4 vs 5,6,7,8 = equal# n$ C! }$ F" Q& p' V
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Round 2# P* N7 Q, h9 b; g3 h- r3 Q
9,10 vs 11,12 = equal4 w+ J0 k( t3 L1 h3 I

+ I; c, @6 U0 \; @0 h4 PNo Round 3
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The answer is 13.
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# d1 s! @/ H4 M2 n, W7 G唔知我答得正唔正確呢?!
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: n# B+ W6 l  O3 a" |; ?, U8 ^1 M[ 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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' @  l0 Y  L/ u1-6 vs 7-12
6 u  y8 j# o0 s+ aif 1-6 = 7-12     13 is fake
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if not
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) k4 I  A6 f1 J- O9 u* r$ Z/ q0 yWeight the 2 time " ?! j$ f' [7 q; b/ z

# A# a+ ~) |) |4 Z% `" KSuppose 1-6> 7-123 V! p9 x/ h* o7 f3 w  O, Q9 |4 T: K

* x8 ?6 T, @% Y" w! L7 J1-3 vs 4-6 & r1 a5 ~* G4 R! x5 I+ `

  j$ O) E3 _# K- f) Z6 MThen Weight the Third4 `4 X0 o, ~, ?
3.
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7 P6 E* D$ k; Z  |8 KSuppose 4-6 > 1-3- y# G/ Y* U: s6 T2 q5 `( c
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Just like the first Step
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$ m. s$ H0 E9 g( F$ |4 vs 5 0 R& O8 U# f8 k7 A

  \: e6 ~! c% R  aif 4=5 6 is the fake one + Z. }# l$ q" y' Q$ ~7 {$ K

$ B7 G" i3 a! I5 y9 u/ Wif 4>5  4 is the fake one % N$ K/ Y+ P5 H" ]$ D, i
and so on......................

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' v2 l- z- G3 z. u) Q4 ?5 x6 t9 o1 m問題第二步
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Weight 1:  1-6> 7-127 P! R' L; E# s/ C4 M6 V
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; {2 y2 p5 @9 k0 v& i

8 e1 U4 S7 L! J) V- Q你第三步点去搵 7-12 边一粒???/ {) ?2 a# [0 T' n* C' h/ ^2 S

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5 i' Y- w5 x) s5 l問題第三步) ^; v; L1 T$ c, ]

; r; l' o( E. o6 oWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 - @4 q/ o6 R, Q% W/ q, x

, G7 r8 I  _& w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