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/ f$ X  n! [& ]$ T1 j+ H) F" ?
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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)。
1 V; }0 u' {# n; @) A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？』3 g0 O7 `8 l" n# x+ J

: e9 C; Y; y' t, H. k: S6 T& _( ^+ ?6 _注意:
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% _3 o% p  i& s& H1. 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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9 c5 n  ]% w, D7 N! Y. ?* [/ M9 i3 i[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:! S5 N( T1 s! w# R0 h  L
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,
* r% r* Z2 I% R% h/ p* N7 G等我搵下仲在吾在
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  `6 d' S# c! P0 Q& H5 ]當日用左37分鐘答１２粒波子，差７分鐘才合格。# G7 o7 K- B7 \. W7 ~
13.........  q8 V9 P2 ?5 A8 u& p1 n
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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:! M0 g+ H+ R3 y+ P* C1 J9 ?
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我以前畫左個chart去答,# ~5 z$ U) c5 @
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:  t4 t. d) T5 A
唔識隱藏...已經諗到..

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3 S3 j/ V: m5 a+ M* `sor !!!....e加改左0 `# g; x2 I6 {( J

( o7 n( Y. ~5 M2 V. B, W2. 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% J) U* _! }; ^' L+ i  V
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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:! S- H$ m+ j- Y' |+ S
相信e條題目都有吾少人玩...

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+ w6 {2 [( `9 K  s* _6 nPlayPlay, 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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/ J+ C3 y( y$ r9 q2 nPlayPlay, Let me know later who has the right answer and I will add points accordingly.* x; r" c9 k$ v/ Q! o( |+ b

( Q# O+ S3 t$ [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.
$ l3 v! v9 t9 }% @$ }! g9 \: n1-6 vs 7-12
' |) }8 W9 I" Pif 1-6 = 7-12     13 is fake
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if not
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: l% H2 N! }0 p# K. e9 ?$ k. @! PWeight the 2 time
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- S+ J+ r& r6 J7 _: a% YSuppose 1-6> 7-12
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& @# m3 h  j+ V" [0 T1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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6 k: a; N- {$ [" O6 p' V$ }1 r* gJust like the first Step9 A3 I" F, f1 ^$ a

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/ {# f$ E7 P1 S1 Wif 4=5 6 is the fake one
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7 ?+ G- v& E+ M/ X  Hif 4>5  4 is the fake one ' c& ?; u" E. G, Z+ w" [: P

( _7 H' B5 P9 Y7 a+ Sand so on......................

hello1997

分3組4隻波子秤0 e; a' A8 R& a# @7 @0 o
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Group A: 1,2,3,4
% E3 M3 L4 H, L8 o7 O* F2 Z1 YGroup B: 5,6,7,8) N1 h' I* E, y0 f6 U# q  q( P; ^
Group C: 9,10,11,12
3 ^/ a) h9 p4 P" `; V2 ]7 ]Group D: 13, _6 t, Q+ R2 \+ ~8 O9 e

5 Q% K# r: C& E: z  zRound 10 o$ h: ]4 P# F; H  m9 y, ~
Group A vs Group B7 s; `' Q: o$ _
如A and B一樣, 即較輕一粒在Group C or D6 a; t$ M# p# p" ?1 }) c8 q
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Round 2  w& f) J! Z6 _  j
再在Group C拆成:
) C. N( r" ^# R, U1 o4 e9 [Group Ca: 9,101 F: i- m- W+ ]
Group Cb: 11,12
# z! A- C- k8 {$ Z& x然後再秤, 如一樣, 即13為較輕一粒.
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! P( A" B1 q; I如不同, 即較輕一組有一粒較輕波子在其中,
3 Z6 g# m& V+ ^, q, m$ R要再秤, Round 3, 之後便知答案.
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7 q+ @; t% Q/ @' o$ ^$ }$ ]e.g. #1 假設10為較輕的一粒
7 M& N0 E1 n' p, ~1 P/ YRound 1/ a' A1 ?5 r9 ~/ D& g8 u7 B  r
1,2,3,4 vs 5,6,7,8 = equal2 C. @1 E: p5 \; W0 U5 f
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Round 2
, {* K6 W( q# b  p9,10 vs 11,12 = 9,10 < 11,12/ y4 e3 O/ y% F" W) j( H% |) p& J- Q: G
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Round 3
- d- E% N! w0 c9 vs 10 = 9 > 10
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" k7 v5 ~  t9 x) A) s% I7 vThe answer is 10.
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$ j) j, {' C' d3 Y; ae.g. #2 假設7為較輕的一粒/ V3 l! `0 @3 I
Round 1
$ w/ \3 i. H- Z8 K1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 23 P+ D: J$ M! S' l
5,6 vs 7,8 = 5,6 > 7,8
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. x5 A3 Q/ C9 W7 w: W) ~) ]Round 3( \5 N2 u& T5 s# b9 s8 z
7 vs 8 = 7 < 8) W, j; Z9 E5 g2 @  t

( L* q* w' [& \1 i* \+ [; Y. x6 L( KThe answer is 7.1 z& ^; A  B# g, r/ `5 l! J* I
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e.g. #3 假設13為較輕的一粒
3 y- V4 q4 O- ~7 ~; p% VRound 1/ C5 K& d( M$ I# a3 `
1,2,3,4 vs 5,6,7,8 = equal2 G8 K' o1 m/ h5 G# y9 f

5 X5 a: e) K3 {  k" T0 N. ?* a0 ]Round 2
3 d7 K! w: o& E9 j% O9,10 vs 11,12 = equal
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No Round 3. a! l2 p" _3 ~0 T
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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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5 }& x; C8 l: z2 }[ 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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. m4 h9 h; X; H7 N) o3 k1-6 vs 7-12$ D% q! I) T* F" ~5 L
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-128 |. a- E9 W# {5 T6 C( Y
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1-3 vs 4-6 7 a% C: g8 q$ y- q
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Then Weight the Third
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% E# N3 l* U% \+ u6 iSuppose 4-6 > 1-3$ b% d+ k8 D& N! e7 I4 d
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Just like the first Step4 S+ Y% ^. D6 S
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4 vs 5 4 k* S! w& Z! y7 d+ R9 U
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if 4=5 6 is the fake one 7 P% R" @6 b7 \8 K* j0 T7 p

; b$ h) S  |4 z1 x8 Wif 4>5  4 is the fake one
" E; B# _; U' [. P" v* Band so on......................

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; ?2 [5 w8 _9 j7 b+ Z$ N問題第二步
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, R) `5 h. t9 _' h+ m; H! m- m- PWeight 1:  1-6> 7-12
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/ F& ?3 j4 k  \1 cWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6% z1 L- _) |* G& B, N3 A

% e' x$ g* i  x( h* P3 Y* w& y, Z5 [你第三步点去搵 7-12 边一粒???( _+ k/ v9 s) x* e2 J: P
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& |, _# ^5 [9 ~0 k" P, D, s問題第三步
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Weight 1:  1-6> 7-12# r  W0 e: T  Y+ |; o9 ]$ }4 d! Q
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Weight 2:  4-6 > 1-3 * c* L. V1 h1 f$ f: {' c# }

& k) Y; V6 q, q, W! Y* Y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