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)。
, k/ u3 w. m; L- a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: 6 I3 m; o  W& d
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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" Q) r* k# k6 U+ V" m

2 i2 Y# }) w: O7 ^2 f( r2. 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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! G( t% Y% Q! l/ k: E: T[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:/ _' d7 f6 k2 R
相信e條題目都有吾少人玩...

$ b$ E% U8 p5 I$ ]( P' z我以前畫左個chart去答,
# b/ ?8 \$ v; t* z等我搵下仲在吾在- ^; {9 l) V3 J* Q) T6 I

  C0 {+ Q' B! h# k: ]當日用左37分鐘答１２粒波子，差７分鐘才合格。
2 J9 A% ^2 i7 ^1 y/ f9 i13........./ c. d: A" v+ }; ~( c4 l* |1 }

4 l* a0 E* ]: o- N! T[ 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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1 a2 `& o# g  j! S我以前畫左個chart去答,/ K+ [, |* N$ Z$ V
等我搵下...

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% y/ X) M. f. d. S8 v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:9 g( X  `# I- c& h4 L5 O/ T
唔識隱藏...已經諗到..

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' A) D# T$ M: n0 o+ rsor !!!....e加改左
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" x1 _+ L3 d! @& p! N# ^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1 K2 f' t( \) ~: r% y" w& u
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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:
; X) b$ z- K4 o2 k3 [, U7 y相信e條題目都有吾少人玩...

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7 I: `; M. ~; H0 TPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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7 Q1 H& j' v$ `0 q1 C+ g" zThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:) A# V( Z/ X6 ~& g3 v/ f
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PlayPlay, Let me know later who has the right answer and I will add points accordingly./ Y& M$ A; \* Q4 S( L6 A

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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.
7 i: n- q3 X5 y6 O1-6 vs 7-125 f* O- y" z+ {( N
if 1-6 = 7-12     13 is fake
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Weight the 2 time 1 t  n* ~0 F. l+ O/ h6 h" b; Z
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Suppose 1-6> 7-12& V! F4 y) f+ L$ l. A) q
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1-3 vs 4-6 . A$ `0 H- I3 _# {; J

/ c- o1 @& E! q! N7 G" \( ~Then Weight the Third3 L& D4 |8 V/ G
3.! V  \- @3 x4 U0 w

& U6 z" `( ], ^8 F8 DSuppose 4-6 > 1-3" L* j( _5 `+ \  I2 F
8 p+ p" Y( `+ F+ `/ ?
Just like the first Step
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8 H6 X) U( F% h4 vs 5
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if 4=5 6 is the fake one ) k! d9 I( ^. e* J

: N( _: \7 P0 Y  B5 J1 P" p! jif 4>5  4 is the fake one
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# L8 `: c- o6 T- _0 t% gand so on......................

hello1997

分3組4隻波子秤
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1 M5 X* @! K6 b* h0 N4 UGroup A: 1,2,3,4
, E, @' V+ x* P( J$ M: L) q) D% yGroup B: 5,6,7,8
+ {$ l; [5 x& l0 ]) |Group C: 9,10,11,12* n2 X5 Z+ W/ G: d& X5 s* O
Group D: 13/ J0 ~) }2 M* N9 j6 x( `

3 C' R# E" A% U6 J5 _8 f7 fRound 1
! n, A5 H& v" v5 e4 j2 `, IGroup A vs Group B6 w8 W+ A; ~* F. t
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
. m4 E) K" r$ E1 m. y! F5 ~, S# C再在Group C拆成:
) U% w; p; H, U8 U8 X) B8 W8 t% k8 UGroup Ca: 9,10+ b/ R2 Z+ ?/ r% R
Group Cb: 11,126 R: j* M/ m" X6 E8 J1 w) H& g
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,
0 V* e& K8 C4 k+ w; R) ~# ?0 E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
7 l+ K) b7 u6 ~+ M3 W/ g  u( _" WRound 1
* N4 u. [9 T. Q, w) o1,2,3,4 vs 5,6,7,8 = equal
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, u( c( i7 O. D! n' c* SRound 2
$ m4 T9 M& f. a& w" q7 N) {% V: W9,10 vs 11,12 = 9,10 < 11,121 h% m) M5 B! T9 s  N' ?2 j) \

; ?- E' X& ^5 @! |1 ], f  C; P# JRound 3
+ {- y( @5 r. a( \% m$ a9 vs 10 = 9 > 10
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2 `. O, T' N/ M8 M1 FThe answer is 10.' b/ m3 v' d. a) N$ ^, Z% V
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e.g. #2 假設7為較輕的一粒
5 w3 H! Z$ ^% }$ Y; A0 l, CRound 1
8 z* I$ `$ e7 j$ h5 D% D5 g% ]1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2* Q* n+ J. M( I" C+ c' s+ X" Q
5,6 vs 7,8 = 5,6 > 7,8) w) i5 O) n9 V, @+ r( T
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Round 36 k# E0 T3 y" R1 H
7 vs 8 = 7 < 8( Q) T: ^8 P; H/ j1 M
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The answer is 7." Z; o* `5 s4 {

  M: f# b; ^0 f: \  P1 l! Xe.g. #3 假設13為較輕的一粒3 @, R& B6 N9 t0 k, Q
Round 1
! |7 f5 J- {2 R- z1 n1,2,3,4 vs 5,6,7,8 = equal- }' B, _" J/ Q% l

9 s- q& _, c$ `/ E/ g6 B, E6 t3 fRound 27 S5 y6 m/ B8 M0 M: |7 r9 P% |
9,10 vs 11,12 = equal$ U( T) |* T) S% u* K% G' x* U

( \1 f' J6 e7 XNo Round 38 z8 m% y4 r; e2 k

- B3 O, h3 n- A5 B/ ^/ }0 W' ZThe 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:: A' Z+ m1 k7 e& Q# u6 D4 Y
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1-6 vs 7-12
  S0 R- N7 D5 S$ x6 x7 Y( fif 1-6 = 7-12     13 is fake
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, K( l+ b( O8 E: _" `0 I$ h: qif not
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6 r  [- ]/ Y0 T, Z! AWeight the 2 time
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# A/ U3 K) k- F- ~8 }$ `Suppose 1-6> 7-127 F2 Y* R" p. a* {  M9 i
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1-3 vs 4-6 5 o* n2 {: F9 |* F! C
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Then Weight the Third
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Suppose 4-6 > 1-3# Z5 K$ g* G/ Q% n" u, w
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Just like the first Step' b) x5 R- B& Q( z4 E1 [: @3 A
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4 vs 5
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if 4=5 6 is the fake one - E5 Z+ Q) v3 V0 f% v+ S

5 m, X9 X5 t- h& T; d, `3 Z4 z- wif 4>5  4 is the fake one
% M. h" M. v+ t/ {and so on......................

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# O; `, O5 I/ q0 r3 X問題第二步9 B* ]+ p( E0 J3 G; C  ~1 n6 L+ j
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Weight 1:  1-6> 7-123 V$ {- b0 l3 ~! f3 N
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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4 D& T6 z1 G  U' f. @你第三步点去搵 7-12 边一粒???7 j. |. w' t0 G) i5 \

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問題第三步- C8 l2 U. E; q  O, Q
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Weight 1:  1-6> 7-12
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& Z; E( k1 |# tWeight 2:  4-6 > 1-3
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  {5 @  D: r2 _; I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