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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" w/ u$ ~2 X) h2 C『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)。& z  O- ]' b5 T2 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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  f" S( ]) T+ g注意: $ j. [& p+ f) {

# X/ [/ {6 B+ y: H* n1. 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+ ?- M6 L' H4 i; N

$ m: w/ x1 u( x6 [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) ^1 u  M& r4 C4 P

, o/ f' N& d+ r, v6 f! |4 E[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:6 T- |' ?& V+ E7 P
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,
+ J' M; `* Y( B" u. B1 y等我搵下仲在吾在7 x8 t2 s+ E  Z% \/ b$ K

$ D$ z& z/ l9 D3 \3 t  t當日用左37分鐘答１２粒波子，差７分鐘才合格。
5 V5 S8 U% t. a8 E13.........% u. L: _7 U  U+ H2 ?" i" q

6 e2 _" ?4 f. w" q* D[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:. N/ Q6 i8 a+ i
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我以前畫左個chart去答,3 g9 \9 z* ?" r
等我搵下...

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6 |6 K- x; Z- X3 O6 g% D$ r$ j! y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:: Y* Y, K7 f5 h' S5 N3 t* u% ?4 h9 H) {# L
唔識隱藏...已經諗到..

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sor !!!....e加改左% H( I; P+ {+ z& F. D6 Q; u

; t/ w* j0 s, k' D9 Y' g! D2. 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, n( g( ]/ O7 c
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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:
: @" _$ j1 g3 Q* r5 A% k6 L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 l! Y& r. d+ f* y  M& PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:: v9 S) j7 o4 v* n  P3 Z4 o
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.5 ]: C" p) a% M8 G' \7 f
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Thanks

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) H8 e, ~5 \3 A+ r不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
' M2 k6 U8 I+ s# s4 d- M# S1-6 vs 7-128 D4 Z1 V( t2 Y: ]) V7 _4 f* G4 c! D
if 1-6 = 7-12     13 is fake- K  }* b% Z' z! ^
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+ }& I/ J+ O4 d* v, j: S) YWeight the 2 time 6 y/ F, n. C, z" G
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Suppose 1-6> 7-12
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0 h' p% q; R8 ^, }' C1-3 vs 4-6
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- ]# S, G% n+ L6 C8 XThen Weight the Third
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" ]2 P, \) h& m6 B" Q7 [9 e8 ZSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 ( x# k, c7 W& V( x1 {  m' D

! F( F/ |; x. s4 W% G1 @9 E0 X! G! kif 4=5 6 is the fake one ( P4 ~5 k/ U/ ]" P4 @/ W9 z
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if 4>5  4 is the fake one 6 K1 ?5 h( ^  O# q

8 y3 `$ ?7 s4 xand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,43 u3 ~" ~( l3 }6 L
Group B: 5,6,7,8) I* d7 N# c3 ]
Group C: 9,10,11,12; _# ]$ k& F+ ]; v+ D) s
Group D: 13) |+ R+ V  c6 w( y  Q) B
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Round 13 v, s6 r+ {* z. v/ a$ v  Q: @
Group A vs Group B
9 D0 f" h$ i+ f; o3 {% O  k0 C( u如A and B一樣, 即較輕一粒在Group C or D6 g: V& {: a. ]3 x* F1 \
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Round 2! {/ x* H7 Q4 c, H. }- s
再在Group C拆成:) ~' D/ l2 Y0 V
Group Ca: 9,103 H+ ~, ]/ u; _& O) S( q
Group Cb: 11,12( I' w5 `" I1 g( ~4 w! Q
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, / E3 _" F; i. b" _
要再秤, Round 3, 之後便知答案.
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  E: ~* A! S2 i, n- n  ]; |5 }; Ve.g. #1 假設10為較輕的一粒& w$ H/ {1 z, h: X
Round 1
- I4 s: n4 q' `% G+ A1,2,3,4 vs 5,6,7,8 = equal+ k. u8 s" h- R: @
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Round 22 S7 i* x( H7 f
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
5 e! f' ]* N1 I/ p2 F9 vs 10 = 9 > 10; J+ t' f! @- h4 Y0 S
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The answer is 10.
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7 _0 f3 G9 u. I& r4 p5 Ie.g. #2 假設7為較輕的一粒5 j8 I# o0 U& @8 Y- l( t
Round 17 G$ V: y$ H& K" a% P% e4 l# l7 z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, K- `  [0 F8 u' C! n
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Round 2$ g  |/ _1 j6 V' F; @: o/ K
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
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The answer is 7.
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e.g. #3 假設13為較輕的一粒) L1 b& T8 |8 L
Round 1
6 I1 {, x" q& a) T/ U1,2,3,4 vs 5,6,7,8 = equal4 m; V: q0 O" l7 e' e
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Round 29 F8 N6 j* F$ ~$ z- R
9,10 vs 11,12 = equal: t! g$ `5 ]7 d: a" _

5 [9 |8 T7 b& t; q. O' M+ VNo Round 32 G' D8 ^/ u, x8 L7 W% e9 S

9 n6 M0 q8 e; _# l  V) KThe 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:; T1 E' V5 P0 U+ Q5 b
1.
5 m# g8 D, T, h) q) j7 @: j6 E2 j1-6 vs 7-12
- d* `0 l5 F: r+ i2 P5 Zif 1-6 = 7-12     13 is fake
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if not + }7 i. P6 I) H4 G

1 A% j0 y5 y$ s$ G  |Weight the 2 time
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5 o/ e  q% E& l  _: |2 c! XSuppose 1-6> 7-12
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# S6 Z. q6 X/ a7 F& t1-3 vs 4-6 6 P- D, W& P) Q+ ~# ]4 v

8 N$ W" u8 H) l$ A+ v! KThen Weight the Third" d, J1 ]  I) R' C
3.# ^7 w. V3 K  _& Z2 W) n. u* ^  Y0 C: K$ `

7 N( N9 l1 h: D6 q1 J/ |Suppose 4-6 > 1-3: q! q4 j4 w( f. Y' X

, Q6 j* U! u; a% |  E) u5 P+ t! EJust like the first Step
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0 v. I3 j* k4 N2 o) S1 t" {$ ?4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
3 R" C- t! S) p* Mand so on......................

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& d" \7 d7 L8 [7 Y% K: v問題第二步
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. K3 y2 S! R# w% c5 T3 f& LWeight 1:  1-6> 7-12
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; q$ o) N9 t6 O9 f5 ^8 P5 ]) `Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, Q: G9 ]) w* ?

8 y" P, {2 y! K! c7 |, O  x你第三步点去搵 7-12 边一粒???- _; e8 k6 B1 {% G

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1 `- h, X; E5 ?! \問題第三步0 ]% m/ Z+ u+ `' G

: i4 g; p! U8 H3 u) l1 g; KWeight 1:  1-6> 7-12& p9 G* K8 y9 h7 A" }
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Weight 2:  4-6 > 1-3 / v, I) ~/ E) f' K# p

" o3 s5 z& G6 x' S( m- g5 F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