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)。8 s$ Z2 ~! @  {
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？』. L* Y3 ^" v. O$ C& _
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注意: ' D& V( O) X+ Z- S+ n
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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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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: Y$ j( T" u+ z/ |9 l) r& [7 c
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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:' q+ f+ A& D7 }3 W+ t" N' D6 T, e8 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,
# l. E$ d) E9 I等我搵下仲在吾在) [% O  S! j' i; Z
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當日用左37分鐘答１２粒波子，差７分鐘才合格。: t/ r8 l0 B7 M  B+ |
13.........
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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:& J4 d. i& E( w8 C) Y; p
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我以前畫左個chart去答,& E0 b. G: f" k' U9 D0 h: {: H8 W
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:
, i, {6 ]% r, w6 `& v& o唔識隱藏...已經諗到..

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/ p( f* f+ P/ k2 j' ?5 Y0 Vsor !!!....e加改左6 p0 X7 S0 Z4 V* h

" `$ @7 T: Z( P2 U) g2 b7 o. p$ l2. 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. B# F. x, ~" F$ q

" U+ n1 e; v3 ~& N2 `4 b- Y[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:2 e7 Y  G# T' E, N- \' g+ |- o
相信e條題目都有吾少人玩...

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- _3 r8 Y! V9 u2 r* ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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: O0 I6 e3 f  i  ^( ^" nPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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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.
) d3 y' S2 {; c7 |" c4 U6 E1-6 vs 7-12# ^, b8 g: G) r8 T/ l, O4 _0 S) K
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time " D' ~" A/ ]' d& G' E; F3 U% H

* P0 o& k9 S7 V3 DSuppose 1-6> 7-12" J# v$ e' \  A# r( T1 ~4 z8 c4 v# y% B; h

  J& u4 u" b% Y) n( y1-3 vs 4-6 : r. T' z* d' ^1 |. D- A

- k6 l2 h- w% Y& K' TThen Weight the Third
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Suppose 4-6 > 1-3
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' t' i& Y) ]3 [1 cJust like the first Step5 P' ~9 P8 b- H. j  f+ M1 Z$ U0 e9 }
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4 vs 5 1 f# D/ o5 R+ ^& X' o1 X( H/ N

- U% v( z4 W% k5 N4 xif 4=5 6 is the fake one & I6 Y1 y+ s: n  y/ R  r3 R" o

6 G0 p& C7 Z# H/ Cif 4>5  4 is the fake one 3 g( ]6 p- Z5 m% Q+ i
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and so on......................

hello1997

分3組4隻波子秤
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0 V0 Q( ~  v# T; A! K( x( [8 ^$ c. ~) }Group A: 1,2,3,48 N4 K6 U$ d) k" M5 G* g0 u
Group B: 5,6,7,8* _" l' a& d  C: X8 W1 h, b# M+ [7 p
Group C: 9,10,11,12- t4 t5 y. E- }3 [, g7 j
Group D: 13
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Round 1/ ?7 A- s$ U/ \( o: o& s# ~7 X
Group A vs Group B7 D' ~( N$ M5 @: f2 m$ y1 ~
如A and B一樣, 即較輕一粒在Group C or D! Z! ?& h) B2 Y  n, N) w

; E* Y) N  v& m3 U6 |: Z& o2 W" VRound 2
: x* y+ H! a* ~0 W* s再在Group C拆成:
2 C3 K" ^8 Z) w$ L; U2 ^Group Ca: 9,10- c" e& V7 M: m2 i, J2 H
Group Cb: 11,121 C6 ?8 }9 u2 M. H9 Q3 G0 Y% N
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,
' E- {. I) p* r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
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: a& u' f7 H2 c9 O9 N0 [1,2,3,4 vs 5,6,7,8 = equal
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9,10 vs 11,12 = 9,10 < 11,12
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Round 3& @$ e0 ~6 ]  N2 J% V' E
9 vs 10 = 9 > 10; W5 s/ I: C$ R) O, i( U  s

  k1 v* V" {% }3 X& b+ U# |  h$ xThe answer is 10.
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e.g. #2 假設7為較輕的一粒7 O( p; E9 o" w3 v1 c. K3 u  c
Round 1
. k6 I* {9 Z9 m7 L1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
4 t! ]- Y$ S& Q5 S4 {) i5,6 vs 7,8 = 5,6 > 7,8
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Round 34 \2 G/ y8 X0 L5 ?, Y  c" A) [) S
7 vs 8 = 7 < 86 Y$ I9 Q9 q8 q# {

1 f  Q; b7 |. m  [: j) h3 M' FThe answer is 7.7 b: F( T# v* g
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e.g. #3 假設13為較輕的一粒: E$ a4 m  a- Z0 G+ s& r1 ]: [
Round 10 p& G4 S! P! B5 A3 Z1 v
1,2,3,4 vs 5,6,7,8 = equal" X& K7 T2 _6 U9 B( i' A

% i3 `% |3 o$ \+ |2 eRound 2
- ~; s) o3 `4 p/ g! r2 F9,10 vs 11,12 = equal& V6 L" n% s: Z/ d9 v# B

& x2 K6 ?! G- _1 W. q8 fNo Round 3
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) o+ N' x, D$ m3 RThe answer is 13.7 {3 K4 O: X8 k$ s
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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:
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1-6 vs 7-122 y8 m3 z; r# [
if 1-6 = 7-12     13 is fake( B+ K! h# q9 U! R. T( X3 g+ j2 m
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if not
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: u. W! C8 L* H6 l0 BWeight the 2 time # G8 X4 B% I! l  W/ W1 o
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Suppose 1-6> 7-12
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1-3 vs 4-6 9 ~: t1 B! P4 n: T8 D# ~, r
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Then Weight the Third7 j5 h: l6 w8 l. E% D+ _
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/ z3 M# Y7 L" p+ s' j# w* wSuppose 4-6 > 1-3: J# k2 j% ^4 V  T
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Just like the first Step
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1 g+ {: U- K3 e' m4 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 S6 q" q# m2 X' R: wand so on......................

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問題第二步
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, P% x' x" b& C% r" yWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6- |6 u% T  h3 j! P0 b1 d4 d
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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12  |' W1 z, m7 i0 F7 W9 N6 `
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Weight 2:  4-6 > 1-3
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: h5 Q2 I. K# E! _/ S: _: @5 y0 e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