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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4 a) M8 P/ c5 G, u1 o  C+ R『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)。
! f% `6 V- B. I1 K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？』; }. W: q* i. j, y
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注意: . F( u7 v* s% x7 D6 z1 [8 W
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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" R; w* Z( e3 l  x
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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
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  X5 Y; x* E5 P. e! {( ]/ o2 s[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
+ v' p" @3 y9 y: f) u. Q1 \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,
" Q8 ^5 q- p1 P/ V" s5 }等我搵下仲在吾在3 F; \( H( Y4 d
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當日用左37分鐘答１２粒波子，差７分鐘才合格。6 o6 G6 e# R. w$ {2 h
13.........
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( S! \: |' L( G3 G0 z2 G[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 a+ f6 j0 p( U) H
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我以前畫左個chart去答,/ o: H4 u  q3 z( @* P; _' y
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:2 D5 w, _& V( N2 d) d% x3 N
唔識隱藏...已經諗到..

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% X+ a8 I0 x+ [5 v9 |- G- ?sor !!!....e加改左
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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* f  l6 ~( O( M( f" i7 z9 h9 g
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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:0 W6 z# D; i5 A% O
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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2 e1 y+ R7 C5 b: v, @3 g! J- oThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, 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.
& d! ~( r/ p( G2 @4 V1-6 vs 7-12
  `3 o& z# Y. K. {3 G0 W. }if 1-6 = 7-12     13 is fake; b! L* [# i1 R( |2 J5 f5 a

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, d1 U. n; d& b# YWeight the 2 time
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% u) S9 [$ [/ t+ J, ~0 C3 k2 ^Suppose 1-6> 7-12
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1-3 vs 4-6 + D$ h# w: J) ~) }
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Then Weight the Third' n- v- Z3 w9 \" l( o1 g$ p4 `
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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. H. P# a' d7 Y4 D* ]) T+ Pif 4=5 6 is the fake one
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! G) ^; \! Y8 B% _4 X* ?' qif 4>5  4 is the fake one ( J! E" E6 N1 S9 q
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
1 Z! Y! c5 S+ J$ Y# R5 r$ QGroup B: 5,6,7,8: z# z% H! |8 s
Group C: 9,10,11,123 s' V8 S  t5 u; i8 X
Group D: 13) I) v2 X& U% D  \" ?& e9 f
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Round 1
6 ^5 j3 `+ L' t# M4 [Group A vs Group B7 J% o! A/ ?' l$ l
如A and B一樣, 即較輕一粒在Group C or D
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! }, A! v+ J! TRound 2
2 {9 }" X* t3 m' ~) d' ?再在Group C拆成:
% j# l1 E. ?- k& R! Q9 c* _8 mGroup Ca: 9,10; ~. {" q0 P. Q! N9 {1 C# z( C% }
Group Cb: 11,129 L+ q# P4 R) `8 B/ ?" u
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, , C0 ^: `2 Q# \  G! G
要再秤, Round 3, 之後便知答案.1 b, B' }. s" W; y
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e.g. #1 假設10為較輕的一粒
7 X: @, [+ @: h7 Q9 h- i9 I9 xRound 1
' {, n# f& s2 E4 Z! W- v6 b1,2,3,4 vs 5,6,7,8 = equal
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Round 28 Z3 `; g7 M3 H( O9 k6 ^
9,10 vs 11,12 = 9,10 < 11,120 ^6 X% |" ^! M# }% ?

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9 vs 10 = 9 > 10. B4 F. v5 i6 Y1 a; }; s% I" e
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The answer is 10.4 O$ Q% ]* l6 |* F" L% G; \+ D
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e.g. #2 假設7為較輕的一粒/ c7 X6 |. B; w5 c' X: I
Round 1
, K" H+ [& o. N( l0 ~6 @5 S1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2. w* f# b9 I8 H( l5 ?6 M) h
5,6 vs 7,8 = 5,6 > 7,8
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4 z" M3 V" L* E" c) _1 M! d, LRound 3+ M5 W8 U: _: i  K8 l( G
7 vs 8 = 7 < 8( x; {2 m& K5 r
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The answer is 7.( q' q3 t' Y& V4 y: h- |) k
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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Round 23 k; I* u. A8 u2 }8 I. L# k
9,10 vs 11,12 = equal
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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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% @8 T* P6 D* T, |$ U& B[ 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 7-12
/ F) r% m* S/ b4 t- g$ Xif 1-6 = 7-12     13 is fake
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' b+ L4 R3 C0 u* ]' [! Rif not   G* \# H+ W0 t, O! Y

7 Y  T; o1 L* Z; F# R2 w5 rWeight the 2 time
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Suppose 1-6> 7-126 y% e2 _! `0 g# J
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1-3 vs 4-6 6 W8 F8 p5 E7 ?( F* h

. V" Z! k! b4 [+ a5 S7 pThen Weight the Third  X2 d; N& t$ }/ f$ |
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+ _0 N' q/ f/ h& K: KSuppose 4-6 > 1-3
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Just like the first Step) W! p8 j" b; }" Z! }2 o

# s' K% Y$ \3 O4 vs 5
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: ]$ D. Z% x7 I; y* K% Lif 4=5 6 is the fake one 6 Z6 w/ s' q1 W

) O! f" V. t9 e, Bif 4>5  4 is the fake one ! s4 P) }4 l6 T" {1 [
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12" Z5 l! J! }+ x
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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???" S0 x& x9 _# |+ X

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問題第三步
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Weight 1:  1-6> 7-126 y) C! d" ~" f! m# `0 _
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Weight 2:  4-6 > 1-3
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8 o% r/ `/ R$ d5 s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