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) ^, M# I- l% V, z% f

+ J! ^! O3 M0 a『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)。
: J* g4 J1 S. x5 f9 A- X, m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？』0 `# h7 h+ _3 o

' S0 F: g+ w& l+ `; H( P1 e注意:
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4 b5 I" Y0 D# C6 R. v: m1. 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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( |+ K4 ]4 j7 j2 w! y; P) d& a5 y2. 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# ~5 T* Q& X( y- F( G9 H2 P! [
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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:
! T; }. L0 ?' n相信e條題目都有吾少人玩...

) R1 ^9 Z9 Y. Y我以前畫左個chart去答,6 d+ V% r# O, |2 D3 R  g  a
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。
) h* D# l; N; B  g( {  k13.........
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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:% @0 l6 k- Y! B. U) L2 f
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我以前畫左個chart去答,
2 w, Q; S5 V; j; D2 O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:1 l0 g% X$ f. X$ h7 u3 }
唔識隱藏...已經諗到..

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sor !!!....e加改左# k1 V' `. r- G& H# w6 }

. [9 Y: R5 Y- O3 w( }5 d/ o% e2. 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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+ J4 J, Q+ u& `$ x  n[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:4 t2 U4 F. X, Y# g+ Q  p: O, ~2 S
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.4 u, X1 c3 X/ r7 [0 r2 v
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:1 K; |. n  X5 c  W& X* _& ^0 E# i2 _, ]
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3 P. ^, f7 Y# J7 U: ]. oPlayPlay, Let me know later who has the right answer and I will add points accordingly.1 p% d) T- K) ?; r" F1 B) h

: e% |4 p5 ]) d  q1 \+ TThanks

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' b) y1 g  i. z. D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
' d, n2 O2 d: V" L" K. \9 f' T0 `, _if 1-6 = 7-12     13 is fake, N. S" y; U- H* o" }  u& ]4 J0 ^

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Weight the 2 time 1 G1 C" [. x6 _+ |. p$ |
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Suppose 1-6> 7-12
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8 K. a9 x; S% k* v5 e- p1-3 vs 4-6 , `/ o- p; `) d
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Then Weight the Third
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/ G0 e/ U8 g- ^& h4 eSuppose 4-6 > 1-31 J  E7 b2 r# ?) M
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Just like the first Step
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4 vs 5
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  J0 U6 B# n9 c# Dif 4=5 6 is the fake one & n: {, A: m* W
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤2 B5 E3 h! E1 g, b) t7 A

) h" a6 [0 O+ I  {& H# PGroup A: 1,2,3,4
5 }; u/ i0 o9 M" xGroup B: 5,6,7,8
/ K% a( y5 m. i  ]4 n1 j% o( Z" ]8 NGroup C: 9,10,11,12
/ y  M, X/ {+ X# B  y. }' K& zGroup D: 13
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Round 1/ K& R6 {# \5 t
Group A vs Group B
! b, d7 Q/ c( {* Q8 Z" s1 h& F9 e" o如A and B一樣, 即較輕一粒在Group C or D
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Round 2
/ r% v  c7 \  h2 o7 q& Q) L6 O再在Group C拆成:
. o- Y. F4 ?' u1 R2 x% BGroup Ca: 9,10/ j- O" b, p: q! r! w" V' F
Group Cb: 11,12
, s  B% c/ e% S" X! p- P3 m% M; J然後再秤, 如一樣, 即13為較輕一粒.
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0 ?$ l- o+ E3 W# J2 a" O如不同, 即較輕一組有一粒較輕波子在其中,
: V1 g/ T: h2 M- ]) ^" {! u$ f要再秤, Round 3, 之後便知答案.0 j8 ?, z' h3 S9 z1 P( x, A1 ?2 `

, M3 Q9 p7 J8 Ne.g. #1 假設10為較輕的一粒8 B. n2 t5 M( c, J3 l; `
Round 1# g( {1 \. T$ [
1,2,3,4 vs 5,6,7,8 = equal4 z" U4 w0 T& d* m; u
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Round 2
2 W! \6 o& R/ m: C9,10 vs 11,12 = 9,10 < 11,12
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Round 3- G  o# y' `8 ~% z$ Y" \! [
9 vs 10 = 9 > 10
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5 m- o! q0 q2 H! l1 h) |) _- U9 [The answer is 10., z1 S: J1 s. d4 \/ J, G
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e.g. #2 假設7為較輕的一粒, |0 b6 d  y9 @$ c2 b& `
Round 1
0 g; z7 q! P& l# H( d8 W, C1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,89 o4 ~8 r0 @" Q  l, C3 W2 V7 C
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Round 2
0 O1 z! v& m; U3 H  B5,6 vs 7,8 = 5,6 > 7,81 U0 l% z7 j7 f2 B/ u

0 B3 |3 v) }/ E6 n! l: n1 mRound 3( q" h6 q- b4 S7 K' K( N) t
7 vs 8 = 7 < 8
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9 R9 U$ l* W0 n' q8 R5 J. oThe answer is 7.
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4 ?0 U. g0 S3 K0 |e.g. #3 假設13為較輕的一粒+ B. C% ~" s+ r! F: \1 H9 q
Round 1
) Y  y. Z) N: O1,2,3,4 vs 5,6,7,8 = equal+ b5 j, V" U  M2 `# Q
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Round 2
3 V# W4 T) C" p9,10 vs 11,12 = equal# w4 Z6 [* @- _

  }" a1 D. L- nNo Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! 5 c9 @( @5 x* O( H( b- }3 \3 x2 G

7 h: e) L4 R7 A: S[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:6 \) h5 \; o* H3 J& R+ ]
1.
- d; I, Y/ X9 ]( E+ Q: q1-6 vs 7-12
2 p8 |, k! F) c0 Z5 T# Mif 1-6 = 7-12     13 is fake8 g! E& _% t% V( K* A( B
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if not
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* s9 S* S2 r0 |Weight the 2 time
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3 D. x# t, i$ b( P3 SSuppose 1-6> 7-12* M" j+ q3 ]) @, F( d
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1-3 vs 4-6 . @4 X) R: S8 V( v! l
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Then Weight the Third
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- e) G- |- ~' m, ASuppose 4-6 > 1-3
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+ k5 }. P2 h/ F, ~4 rJust like the first Step
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4 vs 5 7 F6 U3 X& ]# O# Z, P! P

0 B' F: r2 P' Y/ q" bif 4=5 6 is the fake one 9 S* ^( J: ]& o0 D* @' m3 [
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if 4>5  4 is the fake one 8 o6 v2 w; V% R% z- {" r$ Z5 `
and so on......................

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* _) y/ P6 |+ N: {問題第二步. T* k4 {/ p3 s
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Weight 1:  1-6> 7-123 f2 D$ `  P9 q4 i8 s
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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???
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========================================
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問題第三步) Q* v  t$ _+ h$ G* E
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 * H' |% G5 {$ U- ?+ [
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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