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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; _( c# B* B: S) n7 s, {『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)。* }' b" b" k- ?. 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？』; l( u" t$ R- o1 C9 t" z
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注意:
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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
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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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  Z  N. m4 Q/ C& K1 v/ O[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:- q( B+ n# y' ]! b
相信e條題目都有吾少人玩...

, g5 P0 L4 x5 Z; x3 E1 \' `我以前畫左個chart去答,
& b( `- h+ T$ u+ y2 G1 r等我搵下仲在吾在3 D6 b: j: r; u( Z- `" j+ Y3 b$ b
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當日用左37分鐘答１２粒波子，差７分鐘才合格。) i0 K  m8 q* W8 ?' ]0 d
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:
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我以前畫左個chart去答,- O& ?1 c' p7 P& \4 _7 k1 R
等我搵下...

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* Q8 f% f" ~$ _2 o4 T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:6 @9 z0 |! e8 l& [* T" T% C
唔識隱藏...已經諗到..

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sor !!!....e加改左" p  n" f0 G9 b. Q" J9 M

( G% I. Z$ S4 E0 A0 h+ }. t2. 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$ c" b! o" H0 I" ]3 X8 P+ h3 s
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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:
9 t) M/ p- ?: ^4 _相信e條題目都有吾少人玩...

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: I; v& ], C- Z5 jPlayPlay, 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:- Q$ H5 G* F9 S9 N' I  P$ R

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% D2 p4 m! l$ L. vPlayPlay, 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.
/ k3 g3 q. Y$ m, Z# }3 n1-6 vs 7-12% h' @$ W6 U# l
if 1-6 = 7-12     13 is fake7 V  D. u# G& z2 _0 i
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if not
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Weight the 2 time
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Suppose 1-6> 7-12
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% Q$ d# Z1 B$ R$ n8 |3 L! t" K1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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( J# Q+ v( f* P5 e; g7 R3 fif 4=5 6 is the fake one : E0 V! D" N% W7 X% z/ I4 W: v
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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4 t1 j" X4 R1 @  @/ U
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Group A: 1,2,3,4
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, R4 f: M) I- S( E1 N% D( t2 o1 X% aGroup C: 9,10,11,12- P# K9 {% g- R) j8 Y1 j; b* t
Group D: 13
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Round 16 R: H% g0 P8 Q  g. }
Group A vs Group B! d8 O2 v& L- L) s0 ?* _) ~
如A and B一樣, 即較輕一粒在Group C or D
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Round 2! |  _8 N2 |+ ~" Z# h' N, `/ n
再在Group C拆成:
- s$ x3 b. `; U. ^3 U) NGroup Ca: 9,106 F, x, N* r$ b" ^) @+ q5 a
Group Cb: 11,120 J' @6 _* \4 `6 q
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, 9 f0 e* w  b1 V* m8 a# J
要再秤, Round 3, 之後便知答案.
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: X" p0 s$ q3 R  _e.g. #1 假設10為較輕的一粒
6 p! l( y9 l5 `8 a/ l/ GRound 1# y5 C. ^  R; q1 t& j* k
1,2,3,4 vs 5,6,7,8 = equal
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) d; N+ T$ g$ \, i/ bRound 2/ f5 ?0 P4 O3 @  d
9,10 vs 11,12 = 9,10 < 11,12
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6 p8 W. `0 [, v, ~Round 3. t# S+ Z' J! |9 b
9 vs 10 = 9 > 10% }3 x( F8 E: Q" @8 }  G
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The answer is 10.
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* s0 N6 w2 m  Ke.g. #2 假設7為較輕的一粒
( H7 [7 o' \" p: K( y/ E4 t# dRound 1( I$ e* g$ O4 J, q" C/ }
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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" q3 r' S4 V1 [. m. Z* x2 P! [Round 22 C9 O$ s+ ]9 ^7 T. ]' O
5,6 vs 7,8 = 5,6 > 7,88 m/ g6 o/ n$ U- N$ A- A( m8 d
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Round 3
9 C1 z# @7 O& G9 ]4 a7 F+ ?; i7 vs 8 = 7 < 8! S& q0 K$ d+ t7 i( }% \1 v2 D

; [9 A6 N' u9 h+ NThe answer is 7.. h/ E! v% Y% B# b" j
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e.g. #3 假設13為較輕的一粒
. k" R, ?  i0 r) YRound 1
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- `; z( @. Q* o3 d; H5 z4 aRound 2
' V/ l! {3 V  q9,10 vs 11,12 = equal
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3 ?1 w9 E9 K8 `No Round 3
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" c& s# V  j3 ?3 ]  x9 D. J- }The answer is 13.
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3 e3 o" E! X0 M+ [5 c7 u/ p唔知我答得正唔正確呢?!
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! ^. V2 ^& X5 J5 _4 r[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:: J4 w6 C! f. g$ E- ~1 R
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1-6 vs 7-12# p3 H2 V# X( ~# o# Z& N
if 1-6 = 7-12     13 is fake, C5 f) p( _. R1 M6 W- F% c/ w
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if not # H$ k& v' x% T1 |( P3 ]
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Weight the 2 time # t- i- H* E9 @) _  @3 D. h

& C- J" c: f2 U; Q4 X; L) fSuppose 1-6> 7-12
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. Z4 U! H2 u- S: U1 W+ G1-3 vs 4-6 ; d: U3 [, k8 n9 ^
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Then Weight the Third
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9 n# S" W) x7 M5 }( h) n# X/ \, ~Suppose 4-6 > 1-3! ~4 h8 r0 O+ Y) p. p8 H9 v
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Just like the first Step6 R2 E$ T7 E3 ?3 Z  J
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4 vs 5
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if 4=5 6 is the fake one & x1 K- T) x+ J6 {, U2 R

  I* O, \! m* X  Jif 4>5  4 is the fake one + K) o( W, [  ~0 a
and so on......................

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2 Q  |" n5 U& e9 A3 _1 N問題第二步
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7 m( `/ m1 t! }$ k2 i3 GWeight 1:  1-6> 7-126 n$ F7 m& A$ t$ w# m. k; J
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-69 F" d: o2 v2 K" p

7 e2 k5 V1 O* G! }你第三步点去搵 7-12 边一粒???1 \& I! Y. D" h4 j4 O
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問題第三步
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Weight 1:  1-6> 7-12( j& V. V# m4 X) V
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Weight 2:  4-6 > 1-3
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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