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  o1 Y) D% k2 p1 v2 u$ C1 J
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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)。
2 M4 k  _  U( h  @" C% H4 M9 |  [1 ~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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注意: * |6 \- s6 {# _3 ]/ M! ~$ T
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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& L3 u0 ?- `/ O* M) l
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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# R% }) V0 A3 M2 B8 C' z
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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 21:34:8 T; V4 D7 Q' Q: t
相信e條題目都有吾少人玩...

9 D8 j( q. O- f+ d! p; [. R我以前畫左個chart去答,* k4 y4 L0 R. \! m. `% _
等我搵下仲在吾在' P( D1 u  {; B* `

' e$ f4 r( h+ V: W6 c當日用左37分鐘答１２粒波子，差７分鐘才合格。) g5 I' x( Z$ Z/ u0 W& \$ j  i! j' G
13.........
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) D8 b" P6 x8 O; K4 T[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:7 g1 x' }5 Y9 U- d6 @0 {
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我以前畫左個chart去答,
1 B7 J% ?% @" }- @! A等我搵下...

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6 d/ m& }  H% {* K4 z& b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 C& Q! i! ~2 w1 G
唔識隱藏...已經諗到..

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. |$ P! T& v- T8 psor !!!....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) e, E# H; m. y

2 u( |! ^8 t( \9 S/ W0 z[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:' ~, H, N5 W) i8 t" A' A# Q- Q- K
相信e條題目都有吾少人玩...

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6 ]# q7 o5 O0 |7 [- RPlayPlay, Let me know later who has the right answer and I will add points accordingly.$ g- E, H9 i; g, H1 [6 n
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:) v$ v. M+ L. }
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2 r/ Y9 _0 h; c! U4 b! GPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 z: D' _) f0 V4 M4 a; _0 F$ vThanks

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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.
4 _; M; b+ u5 D+ Q1-6 vs 7-12. `/ [6 s* f) }7 ~# O' o3 g6 }5 U. I
if 1-6 = 7-12     13 is fake
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Weight the 2 time ; B" u. O. y( M! ~. L! ^

2 ]" _! G) s  dSuppose 1-6> 7-12
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1-3 vs 4-6 $ H  O7 W, D& @
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Then Weight the Third0 a- {- \3 K* W
3.
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Suppose 4-6 > 1-3, t3 @  W- I# l
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Just like the first Step, t* Z+ b$ m1 o4 ]
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4 vs 5
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if 4=5 6 is the fake one 0 c' |) m' o! q; a6 e+ W% c
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if 4>5  4 is the fake one
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; b& `: Q4 \8 Z3 A$ A$ j4 land so on......................

hello1997

分3組4隻波子秤
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1 v9 b7 }3 @; N: K% |Group A: 1,2,3,4& E8 o9 ^4 w: V% r
Group B: 5,6,7,8
6 W: x* ?. N- @Group C: 9,10,11,129 s) ]$ h! G" M7 d
Group D: 135 z0 h$ x" m$ w( _

3 H6 L, R& K8 L) G! X/ ^Round 1
3 G' G7 s+ |0 u! {9 ]Group A vs Group B
/ ~1 P6 V& ]. H6 Z& T8 `3 W2 [. F! Z! E如A and B一樣, 即較輕一粒在Group C or D8 F- J$ u; m: \2 _) k8 y
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Round 2; E0 Q2 i3 ~) b8 r0 u
再在Group C拆成:6 V" D: y9 M( U! H$ d6 W
Group Ca: 9,10
% V- g) R7 w9 h& _1 rGroup Cb: 11,12/ f* g% n+ m8 t1 o
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,
, D4 c- c' R& H- c3 \7 i, Q( h要再秤, Round 3, 之後便知答案.
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( P) n1 j2 z5 ]4 ~' p! s" F2 p/ O3 Pe.g. #1 假設10為較輕的一粒; F! \) g) F% e( r' m
Round 1
4 Q4 ~( Z0 g. t2 S/ n1,2,3,4 vs 5,6,7,8 = equal
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' a" U! E; W& mRound 2
: M# |4 A' L5 c# y* K. F9,10 vs 11,12 = 9,10 < 11,123 ?- h7 `* X0 P4 s+ U
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Round 3  X1 d# O% b/ {" `0 X! q: B
9 vs 10 = 9 > 10
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1 Q; D- g  q+ N* cThe answer is 10.9 B! d# c7 {9 B; P( I6 G: r% Z( V
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e.g. #2 假設7為較輕的一粒+ M2 Z- i  I% O% W" k3 A% e
Round 1
! U' @! i, p7 X. H* u  g1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 25 R: z, P- |: p7 V1 e/ y
5,6 vs 7,8 = 5,6 > 7,8& W, c7 s8 K3 A( S5 e$ {* y. ^

& l: c" j- {7 r: t$ _% JRound 3+ P3 w* x$ w  G' f% j" P  I$ s1 L
7 vs 8 = 7 < 8
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The answer is 7.6 P' c" o* P. U5 u6 a/ [+ x
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e.g. #3 假設13為較輕的一粒
0 W# [  O5 q0 kRound 1
& q- K0 b9 D( |" f/ {% C, [! [1,2,3,4 vs 5,6,7,8 = equal3 c2 V/ _; p( Z) b& T" R

' V' T7 F2 |( ?8 P/ vRound 2: w' E) P  p% b" N; E: y" M  {
9,10 vs 11,12 = equal# B: c0 m  D7 h

& O) N) t4 }/ y  [' [0 z% `9 w: @No Round 3( }5 |+ t& N+ T, \
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The answer is 13.+ M+ a* [. u6 v" O
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唔知我答得正唔正確呢?!
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. x6 h* T1 n, T[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:! t) \0 v5 a; x+ {2 h' B
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1-6 vs 7-12# A5 R( c* c$ c2 [2 ]3 p" N
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 9 m  C& G  R  H
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Suppose 1-6> 7-12
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& q7 K! _  Q& l: C1-3 vs 4-6 ( t/ _1 h8 I5 K  q2 V

( d! F% V1 n6 X/ o' _5 \Then Weight the Third
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$ v1 H  @6 Q! i% c) e; c& s# rSuppose 4-6 > 1-3
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  X/ Z; c  D, s  o& JJust like the first Step+ T" N. F' j3 p. E" ^
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4 vs 5
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) l/ |; ]9 b, xif 4=5 6 is the fake one
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if 4>5  4 is the fake one
! r, H7 E1 V; L( \5 H: ~" O5 |and so on......................

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問題第二步, h( d4 A" {8 k+ U& K2 {. }6 E
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Weight 1:  1-6> 7-12& }+ m' `1 Q" g
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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- C# y" w. F. P4 \你第三步点去搵 7-12 边一粒???6 A' S( V' k( s

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問題第三步
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0 u& I- C1 m. J5 Z; A+ pWeight 1:  1-6> 7-12
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' e# t9 ?( |! g( CWeight 2:  4-6 > 1-3 $ [- X; ?, S# m% ~2 V
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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