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5 D' B. Z2 g  s
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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)。+ y. ^1 }( }+ p) I$ 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？』* b2 S2 w7 d5 b
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注意: , ?1 l3 {+ i; S# ?. U; s
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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# S4 @5 \2 v6 Z# g, l9 _9 h
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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# Z1 N+ P' I1 o# q' W; `/ t
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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:
1 ]& ^$ ]/ z3 M# n相信e條題目都有吾少人玩...

) v, @& v) @, B8 s7 H我以前畫左個chart去答,
5 C" C$ p1 h& a% b0 U! }- _等我搵下仲在吾在  @6 T' r% Y1 c, Q0 v, j; O7 v

2 Y8 Z' _4 d  c3 W4 ^( E當日用左37分鐘答１２粒波子，差７分鐘才合格。
( V" m0 e+ J: i* c% ]" N" N% B* n13.........
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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:* J9 X7 N, P& @  I# B* s7 @) a
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我以前畫左個chart去答,+ P& P; C: o( ~2 h) b8 g
等我搵下...

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; D# ]/ B, [9 ]8 C* b8 y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:
3 g, n- v/ U  s3 p% m" c2 d1 `7 J唔識隱藏...已經諗到..

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sor !!!....e加改左
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- z9 c2 k3 B4 h; w' O- H2. 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  D  b& U* ]: B" {: x
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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:4 @. X3 j! N3 t0 E% n: y+ n; W
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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7 U8 [  U5 f6 J5 \3 q1 yThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:1 R! w1 \) }3 Y4 }7 N

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( n; f0 ^! X1 M/ l: [0 zPlayPlay, Let me know later who has the right answer and I will add points accordingly.) u  [  ]! ~4 S6 V1 P+ G
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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

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1-6 vs 7-12
' t/ V- E9 G2 E% ~$ A* rif 1-6 = 7-12     13 is fake4 y+ X$ T. [* [7 p+ A8 J/ c
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if not
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Weight the 2 time
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* j& z9 S2 S; [; S) PSuppose 1-6> 7-12
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1-3 vs 4-6 6 ^( A9 {) h; C0 C) D5 N% F

, a4 X) H  t. E3 b/ H. JThen Weight the Third
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9 }$ O. b2 |' tSuppose 4-6 > 1-3
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Just like the first Step
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if 4=5 6 is the fake one " s1 c4 S* {& T, {$ N! t4 S3 H

' G8 l" f: ~* ~2 W! G& oif 4>5  4 is the fake one 2 g, B# S- X& @& ^+ S4 Z: U) m% o
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and so on......................

hello1997

分3組4隻波子秤& {8 W" R% N0 D( }( F
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Group A: 1,2,3,45 m4 x2 f. U& {) L/ ?3 }, C1 P
Group B: 5,6,7,8
( E, r/ X2 }" c& GGroup C: 9,10,11,12
% L3 _9 E" C6 V* \5 y* f5 VGroup D: 13- R% o. |+ |: v1 n; M+ a5 A' _

9 c& `$ n7 i8 S( Y7 cRound 1& \% l9 z! L+ h& F. H1 a  M7 J
Group A vs Group B4 {/ F6 t) ?# ?7 t1 W9 z
如A and B一樣, 即較輕一粒在Group C or D: e" F/ @+ Y/ m; w" ^' v- s

% u/ w: ?# L7 c0 K* URound 2
' n, c2 ~$ E* {再在Group C拆成:! I' `+ T1 b% F7 H1 ], ]
Group Ca: 9,10
1 Z2 ^1 E) P- _/ L+ A+ qGroup Cb: 11,12
" o9 _6 Y* {3 P8 o$ b然後再秤, 如一樣, 即13為較輕一粒.
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: w* J3 S! a) ~' w" k如不同, 即較輕一組有一粒較輕波子在其中, . O9 G5 ]3 ^, X! T  `
要再秤, Round 3, 之後便知答案.- x8 G( s& W+ `$ J% u
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e.g. #1 假設10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 2
: [$ f8 }. k; I; m, U9,10 vs 11,12 = 9,10 < 11,12" A5 y; D0 x8 p! j2 }

8 |) b8 W5 t! X3 QRound 3
5 P3 A% s% R. _( m5 B% _9 vs 10 = 9 > 109 Z1 j3 Q7 q6 \
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The answer is 10.
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# F" I0 ]) A* y& o  ye.g. #2 假設7為較輕的一粒  E* f5 s% V4 Q6 m7 t
Round 1! ]% r$ N- [; i" [
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
% @: g2 w: D+ {: ?* ~" i. p* y6 X5,6 vs 7,8 = 5,6 > 7,8
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- e: ^, i" O' M- G9 n9 n  lRound 3- G5 ~5 r3 h; y7 \
7 vs 8 = 7 < 80 b) q6 U* Y) p/ [8 T9 W
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The answer is 7.$ o5 [! t% I9 ?1 l
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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+ s! C" R- |- W# U$ |. |3 ~! ]7 ]* N
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Round 2
$ d6 S( \7 c& }7 Y& H9,10 vs 11,12 = equal
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; _0 n! w/ A8 o9 H$ z2 sNo Round 3
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. d( ?% g6 g  b) j5 P0 cThe answer is 13.
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9 P& v! p! M" }$ e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:# J0 y' t! c  i+ v7 i/ d
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1-6 vs 7-12. M5 _3 b9 i: {* F( ]8 O
if 1-6 = 7-12     13 is fake
% }7 A& f$ @/ @) [" P% l( X, a" N* ~! b! H  H. S, i6 ]* x* e% E
if not
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Weight the 2 time / t" i/ \0 p9 k& g% x4 W& o

" u: E4 ]6 X/ j7 x2 }5 VSuppose 1-6> 7-12
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1-3 vs 4-6 " [7 F( J/ v1 J- ]

5 k/ ^6 k( Q) U& z4 C9 k0 KThen Weight the Third
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Suppose 4-6 > 1-3
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  b' A+ D4 x. t+ X" {Just like the first Step
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4 vs 5
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' w7 s2 a9 N1 i6 ~if 4=5 6 is the fake one 7 M' b! N$ A" u/ X1 D1 f
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if 4>5  4 is the fake one : d, J; F" }8 j  w9 D( v
and so on......................

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問題第二步+ h. T- x) }$ J  ]) O' z- O
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Weight 1:  1-6> 7-12
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# y3 \; T- P+ F' W1 U/ V0 dWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 X+ h/ @& m. K, D0 x你第三步点去搵 7-12 边一粒???  X$ c& F4 k0 u
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問題第三步
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; f& t( A+ a3 y/ {" l. ?+ AWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 5 y# G9 h( _" c$ n

9 e* P) B- {; @& ?2 f6 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