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( x9 d4 T3 A: @# R$ k0 X% _
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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)。5 }' r! Q8 U/ Q% e- y
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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) P  c: @# V8 _# l; @' E4 h2 G注意: 8 O5 c1 G* J  ^& Y

9 J( X6 U+ n+ U* v8 k" l$ D1. 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
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. S( A7 G! h5 H5 G' N, ?9 t9 u[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:3 n/ [# Y# s: }. Q8 Q( n" }( I
相信e條題目都有吾少人玩...

1 d$ k- O, @+ K, o, t( D. ?我以前畫左個chart去答,
0 ~+ b4 ~* R! M7 n# M1 q7 F等我搵下仲在吾在
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5 E3 E6 H5 s  J# ]6 Y4 J; ~當日用左37分鐘答１２粒波子，差７分鐘才合格。, r* ^( }8 g* M8 I; N
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:3 h4 Y! w# P5 ~, `% m& P. L

, L# Q" Z# E" {: |. j( F我以前畫左個chart去答,
+ L- Z5 |. J" b% F- 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 b( f) {5 I  t" h唔識隱藏...已經諗到..

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( c: c. m2 T6 ]5 tsor !!!....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
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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:
% _7 [1 M9 u* v, P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.* v: Q0 c' }$ S1 y
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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8 _3 E0 p* R9 F% {- P( m) L' z: JPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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* d+ I' Q2 {. a+ ?- bThanks

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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

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1-6 vs 7-12
! N. S) p3 c" mif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 6 v  a% {3 g# f( B; Y9 D" _
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Suppose 1-6> 7-12; M& C% Z$ k1 H/ p! C

4 p5 v( W/ A! j- p8 j1-3 vs 4-6
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# _; B# E$ }/ I, k. zThen Weight the Third
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  O5 Q$ a& b5 e/ ]# ^7 jSuppose 4-6 > 1-3' J8 }! f$ W( [5 b
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Just like the first Step
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4 vs 5 2 K2 x" e9 v) [5 m

. W9 S, c3 g7 hif 4=5 6 is the fake one   L3 R. V% \# w) c8 o( X' B
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if 4>5  4 is the fake one / l$ `. U9 x' W) E# f

" D+ m, X' n# l1 D6 [and so on......................

hello1997

分3組4隻波子秤4 [/ J! I. u) E0 R
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Group A: 1,2,3,4+ W5 v: h9 s+ [. A3 f& G% t
Group B: 5,6,7,8
& z4 Q/ x6 J: }! j- QGroup C: 9,10,11,12& @' o- q. t9 V& f0 J$ H+ I# J6 y
Group D: 13
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. q( S+ D1 J/ n- XRound 1
; ~  L( @' U( u+ e) `% I0 V/ DGroup A vs Group B) ~3 }& D8 j6 K7 E$ l1 X) u
如A and B一樣, 即較輕一粒在Group C or D4 k. M- R+ c- a: b: t2 B+ V! o3 E

4 X7 w. ]+ Q* _Round 20 U/ C) {6 M9 s
再在Group C拆成:
& e* t5 r7 ^2 ^, L; jGroup Ca: 9,10
/ n- ]" n0 X2 m$ kGroup Cb: 11,121 H* E1 f& }/ g% _% L5 U; ~
然後再秤, 如一樣, 即13為較輕一粒.3 n2 `) Y8 O2 S7 P5 H7 X# w
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如不同, 即較輕一組有一粒較輕波子在其中,
; V) r! I2 F$ \! J% y* w要再秤, Round 3, 之後便知答案.
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0 N+ I2 U% ^1 }, le.g. #1 假設10為較輕的一粒
8 P" h: Z0 w; Y$ ^% W& {) |Round 1
8 H" s" I- Z* H1,2,3,4 vs 5,6,7,8 = equal
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Round 2
7 W6 N2 \2 d8 h  X% o6 M9,10 vs 11,12 = 9,10 < 11,12
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Round 3( U- w- Q; _7 m. m$ Y
9 vs 10 = 9 > 10
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$ [: h" x, R3 `8 ?% ]The answer is 10.* b( r/ w2 b  a, M8 I) T8 h

, B4 C; c+ {9 R2 k, \: pe.g. #2 假設7為較輕的一粒: _) O7 q3 v9 R0 @; x
Round 1" m5 x" X# t0 I
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* {" f3 f" q* z: m/ x& w2 s* Q
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Round 2) B, ^% s- }2 {' M& o( k0 W1 ?
5,6 vs 7,8 = 5,6 > 7,8
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Round 33 T* Z, ?( P$ @/ H; k6 j& N) ?
7 vs 8 = 7 < 8
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$ A% }$ A5 ~8 p1 fThe answer is 7.1 x8 @1 ~( Y8 O+ n) j
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e.g. #3 假設13為較輕的一粒
2 i! j  r/ L2 C% dRound 1
4 \# ?7 A! a- I' B. n4 e! I1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! f$ d+ f5 y' s, x% W/ J( N9,10 vs 11,12 = equal
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( P5 p, F! q" E, y% e, H% a: rNo Round 3+ r) L. H: \% H, K

" Z; c' P4 d1 c! uThe answer is 13.
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: o1 Z5 \1 D4 y+ I唔知我答得正唔正確呢?! 7 H. N$ _3 x  W$ b! A
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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:, _8 K6 ?8 @# z  C. B  x+ {" O
1.
9 ?1 }: P8 B) N2 T1-6 vs 7-12, [2 Q% S, g& [5 B
if 1-6 = 7-12     13 is fake
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9 t% b3 z* p# q7 `! }4 j% tif not
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% ]% C( C3 Q9 F8 k. UWeight the 2 time ) L! E* U9 Y, y4 ?: g1 T' B
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Suppose 1-6> 7-124 s2 v/ I, I! o* Y+ y( f

, N: b6 {* U, b4 F4 E1-3 vs 4-6 ' F2 k5 R# E( }$ N- b- n4 l5 L
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Then Weight the Third
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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 1 ?! s4 B3 Q- j  F. T
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if 4=5 6 is the fake one " r  l8 v  @0 L8 N9 m0 M! g- c

$ }6 A- L5 k. B" [if 4>5  4 is the fake one ( I: b; H" f& p: |8 [& g0 p
and so on......................

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  ~: E$ w& p6 p, N2 ~6 {6 B9 R" B問題第二步
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2 Q  Q  E1 ?! S, ^) kWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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7 t( Q! `$ Q% s! Y/ x你第三步点去搵 7-12 边一粒???
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* u  h, n2 j$ i: X/ [========================================
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問題第三步% w* f$ Q6 p" m  t! U( t
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Weight 1:  1-6> 7-12
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  w# Y  @+ w) A% i' i: y, ~, ^Weight 2:  4-6 > 1-3
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; w4 x/ b/ k% k5 l* S9 [- p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