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$ ?# g& q8 L' }' g" {2 S! c- }- U

" O/ L7 N9 X) D' L0 j6 @/ F『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)。
% G* }/ B3 b) C/ V7 ~( B& D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？』' J! C, o* K% h0 j
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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8 P9 ]3 N1 w' I5 L  H
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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  , hide 字要連埋 , 內容 = 答案2 W% P8 u- x% x7 ]# m/ e1 `
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:; f7 C; ?! ~* d  l) @/ 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,
( p) @  E' r  O# e( \等我搵下仲在吾在
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; ^" k/ d' D% |: N6 q+ C6 P當日用左37分鐘答１２粒波子，差７分鐘才合格。: U6 D5 X( x2 _
13.........
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5 o' P! H  n% Z' p1 `[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:" q0 k) J9 s6 ~; Z1 C
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我以前畫左個chart去答,( J% Y2 o& R4 s3 |4 s
等我搵下...

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, r) z2 @0 g: [6 G: t) E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:' }. R1 s; e( W* v; p. i' `
唔識隱藏...已經諗到..

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2 |6 C7 D. c1 S1 a! H- dsor !!!....e加改左9 @4 }9 O" U- V/ 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:
3 I, B/ f: E$ F5 v9 a相信e條題目都有吾少人玩...

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, K& Z$ N- t9 f- vPlayPlay, Let me know later who has the right answer and I will add points accordingly.% O% m' V- q# d6 ]
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ v8 P8 H5 L8 X/ _% Q  d  Z+ i

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PlayPlay, Let me know later who has the right answer and I will add points accordingly." Z- u$ G3 d, c

. f9 w4 d" r' l5 Q, n7 W' E" g9 }Thanks

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" A9 a1 w2 g7 E$ v2 L6 U不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.# k. a& W  }% F$ ?: {5 A3 W( Z1 a
1-6 vs 7-12
& H8 u5 b( Y, _, u, Tif 1-6 = 7-12     13 is fake
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# S6 Y( _8 d4 K0 e- g4 ], Kif not 8 ?6 [; p5 ]! ]. l8 P) P
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Weight the 2 time
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Suppose 1-6> 7-127 t) \9 Q5 i: p# g: L( V; \5 Z
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1-3 vs 4-6 " ?% u1 Q" {4 |
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Then Weight the Third
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  c2 }' J  b. USuppose 4-6 > 1-3# _/ J1 R( p" U. ]8 d; k; Y

% M' ~" \0 z5 Y" C+ d( ?) V' O, IJust like the first Step
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4 vs 5
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. T& I1 q; s% z* \: nif 4=5 6 is the fake one   _3 r& `6 W/ {; d# L$ |- ^( v

$ ?2 X/ s7 v  {7 y7 F& d8 F6 Pif 4>5  4 is the fake one * `% N$ n' P7 u& K8 R$ c  {

+ t' e; Y' o! P* E  ~0 {; Gand so on......................

hello1997

分3組4隻波子秤6 [- B  h. ]1 g) i+ `4 S( x; R
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Group A: 1,2,3,47 b3 O% T. w, q- }- f/ j
Group B: 5,6,7,8. U5 X! {1 r/ P; I. \
Group C: 9,10,11,12" i$ ]+ l3 ?. B2 z% S
Group D: 139 \1 Z: w$ j% h6 x

( |- e. s3 A" g  yRound 1! M# z7 V# |) i* Z8 E# n
Group A vs Group B
1 i- H) _! F) w0 F4 P如A and B一樣, 即較輕一粒在Group C or D) e2 J; G  j! B

& V  n0 v4 n$ I  xRound 2- J1 z; G9 D% q4 w: X! L* X
再在Group C拆成:
# |; F: s+ e3 z, m) m/ e3 T- }Group Ca: 9,10+ t( t9 t0 |) [0 u* }: ^
Group Cb: 11,12
- P/ T8 m6 {$ U* j8 a  H3 n% o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, . L5 A/ D0 `# E+ [( I
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* S; r  u1 l3 n* E
Round 12 a- L* S$ j3 C, T. W1 z
1,2,3,4 vs 5,6,7,8 = equal- y4 v1 T; V# [9 c3 f4 M

- b9 u# Y/ ^% s% Z, VRound 2
, Y8 J7 M5 M0 l# s8 \  O5 j9,10 vs 11,12 = 9,10 < 11,12
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Round 31 o8 [9 s( |# x9 G- Q+ F8 A
9 vs 10 = 9 > 10' W7 r$ n! t$ w; l. K; x1 p
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The answer is 10.
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e.g. #2 假設7為較輕的一粒# ]( o% x3 Q; |! @0 _. R+ Q6 R2 w+ `
Round 19 Z  W' n/ k+ Z* {; W" u* b3 I
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
5 Y; ^. [- g, x; Q% [1 d5,6 vs 7,8 = 5,6 > 7,8$ H4 C9 i5 L! ?! X$ B
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Round 3
4 D0 D) R, U$ b5 S' x$ R7 vs 8 = 7 < 8% }( ^5 d0 F  ?- w0 F( w

7 `5 g! J" S! x' EThe answer is 7.$ C' r  k0 M( |, d: m
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e.g. #3 假設13為較輕的一粒
5 i' l" y7 V' LRound 10 l# u; V, {* P( G  C
1,2,3,4 vs 5,6,7,8 = equal5 ~7 _/ j$ ^3 z. N3 G  f. e
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Round 2
; K* B0 ~5 Q1 l9 `& N9,10 vs 11,12 = equal2 H3 R3 C  T% h3 e/ ]/ P/ P
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No Round 3
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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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6 R, H; g( l- P( S/ m1 i( t7 f) f[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:, x! c. M( n# N+ p$ _! G& X& J
1.
0 K: n3 Q: k) R1 W" X1-6 vs 7-12
, p' k4 X/ L7 W: V' xif 1-6 = 7-12     13 is fake
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; S( s: D* H; D7 W3 ?. xif not 8 O6 ?, F6 U! R0 Y  d# j
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Weight the 2 time
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9 q. O# w0 `' E* W! \Suppose 1-6> 7-12
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1-3 vs 4-6
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$ ]& g8 F! I* w- cThen Weight the Third2 b( K9 {, g: b# v
3.
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  B% B+ l0 H9 I  f% N9 h0 fSuppose 4-6 > 1-33 \% f$ n  Q) r8 o

, Q# e# {) ~1 X' {Just like the first Step, ?0 A9 T' d0 x5 J
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4 vs 5
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9 F6 z4 b2 t( {2 @9 `/ v. r# z9 }if 4=5 6 is the fake one
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: [, J8 W) L- T! Q: O! Mif 4>5  4 is the fake one
- U2 N: Q0 I. l4 k9 L) D  ]and so on......................

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! E) s4 V8 a2 S. ~問題第二步* ^5 p; w9 x2 }$ k5 N
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Weight 1:  1-6> 7-12! i, Q8 ~( N+ z, D- h
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???  W% \) [# Y) W" l; q

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! t. O6 Q4 F- \9 J問題第三步
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! d* n/ d  t% m# V' x2 R, dWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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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