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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『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)。4 u% Y9 R( I8 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？』9 W0 ^- E0 Q' Q% d! h# X
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注意:
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7 t% j% m7 {1 m# H6 g1. 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: X, }7 D/ w  E, V4 A+ F

; |! {2 ^) ]2 z; Z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 n) l( Z' ^; y, j3 j4 g相信e條題目都有吾少人玩...

* e# h3 L0 N+ u& c2 p# K我以前畫左個chart去答,2 }9 ^2 ?- L, h; M
等我搵下仲在吾在  c# P6 B$ c, A/ t

3 ]) r& r: V9 @5 O. {) i當日用左37分鐘答１２粒波子，差７分鐘才合格。
2 C$ O  H+ N# T- n" _3 y) f+ [13.........$ S" i# ?4 y( O' r- G7 m

+ H1 Z+ l) ]& ^9 s[ 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,% \! G2 M+ I; z# H; B; N% [
等我搵下...

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  |) J4 y2 \$ f. K* C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:
( z) s* a' j$ M$ [8 U唔識隱藏...已經諗到..

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sor !!!....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2 n& g* I8 w) l

5 c! i* x- I7 D5 O$ p- h5 L0 W/ a[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:6 }# P2 a6 J: G# J0 p7 E" ?, ]
相信e條題目都有吾少人玩...

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& ~, V' F+ }1 t0 ^: P9 W+ V( c" XPlayPlay, Let me know later who has the right answer and I will add points accordingly.: h0 ^& P! H( a% o9 `$ F

9 S. `1 M! e' I9 q$ xThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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( o) a6 R; l; k6 i8 {PlayPlay, Let me know later who has the right answer and I will add points accordingly.0 C. c, O* |. l4 r& T1 N

, D7 l1 [5 M% S; I/ ]# nThanks

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9 e  ?- j& j9 n' W5 _* I4 p不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
- a+ c+ }* Y% e; }& i( v8 f1-6 vs 7-12
0 P) y6 Q+ L- h9 v1 ]# [if 1-6 = 7-12     13 is fake
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Weight the 2 time 8 T  j( }. t3 m2 {- T3 U
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Suppose 1-6> 7-12
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; f0 @& b# T# i/ \1-3 vs 4-6 6 K0 ?# W% r" x/ N
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Then Weight the Third
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1 c: m0 p" Y" E; Q7 J, r8 LSuppose 4-6 > 1-3% G! o% ?) V* l7 A
2 z7 J# z( F5 ~+ c, d' r+ B
Just like the first Step
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. M4 |, O: u+ m4 vs 5
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# ~/ @8 m9 r: sif 4=5 6 is the fake one
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- B, p- c4 y+ C9 I; xif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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( l3 H$ g5 Z9 X5 W& u6 pGroup A: 1,2,3,4
9 o/ J( l4 n4 p. g, }Group B: 5,6,7,8
7 A! O5 M+ e" w) J" Q& GGroup C: 9,10,11,121 Z" X8 ]) V% `( c
Group D: 13
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- q% P' _# ~% c+ P* p! tRound 1
) L) k: @* U: g/ I+ HGroup A vs Group B3 G" \5 m. U1 n0 j5 K/ s
如A and B一樣, 即較輕一粒在Group C or D) f6 k' m2 }( y( _/ B5 r5 _

7 F! Y" j1 w& I) C) |) pRound 2# B2 b9 F$ V! h6 [% e/ V
再在Group C拆成:( w" g- j0 p' X5 |3 O7 v
Group Ca: 9,10+ y0 _# v4 H% p% C6 B& Z
Group Cb: 11,12
' m# A6 j% l0 f3 ^% h6 S' C, \4 W然後再秤, 如一樣, 即13為較輕一粒.5 u) Q! W* P7 e" C; C

9 [- b: i) E1 a1 l. m# e6 S如不同, 即較輕一組有一粒較輕波子在其中, ( P* e' q' j: [: P0 S) L
要再秤, Round 3, 之後便知答案.) c7 w) m# x; z2 |/ u

8 b3 c. D' h6 e& C( q' L, q' Y" z" ae.g. #1 假設10為較輕的一粒& z5 [9 A* U. x* a
Round 14 F0 a. I0 A. o
1,2,3,4 vs 5,6,7,8 = equal
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Round 22 m. Z; ?) Q" h
9,10 vs 11,12 = 9,10 < 11,12  `' w( y7 M* }0 s" m

. k1 C8 ]9 i: E, yRound 3, m+ l9 J5 i, r$ s6 T
9 vs 10 = 9 > 10- j! j8 S; k0 r
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The answer is 10.
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( q! T: J( O" ^, Ze.g. #2 假設7為較輕的一粒
0 R1 |* Y8 N) r  H3 lRound 1
9 H; d& z1 `. z; M1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8  t* m8 }8 H- F

+ f+ J( p3 n3 u3 J+ O5 c+ ]Round 2
2 `! o0 I6 d; U2 K5,6 vs 7,8 = 5,6 > 7,8
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Round 3
! Q# ]# S) W  I, ]2 ?7 vs 8 = 7 < 8
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6 m7 T6 e* o' @$ _& ZThe answer is 7.; a& Q7 `" e/ w1 y! ^$ B1 F4 O% r0 M
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e.g. #3 假設13為較輕的一粒
6 [* K9 g2 l- JRound 1
% T& ?; G+ ?" x: x# Y& b- n! X* H1,2,3,4 vs 5,6,7,8 = equal! K# b  s# a# c0 B5 {
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Round 2
4 G0 Y: v0 C. O6 V2 d9,10 vs 11,12 = equal3 g( G6 v. W3 U

* g& ~& Y0 F3 O2 s; Y5 B$ [No Round 3
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$ Z1 Q) x9 f% [- {, C; _& lThe answer is 13.
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唔知我答得正唔正確呢?! % j3 E- a" ^- I1 p

( j8 x7 v1 Z2 X( J0 J[ 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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9 W9 a8 w' i/ H2 j* t1-6 vs 7-12
( F$ a/ L& t/ A+ rif 1-6 = 7-12     13 is fake
: E9 g" s( C6 T! \8 z9 u1 Y2 D0 y
! c- u& u" w% S; r6 M9 Dif not
2 t5 @$ F, y+ v4 ]) O: w  [0 h8 R+ ]) i$ P; m
Weight the 2 time
: }3 ?( ^  p2 Z; C: n4 k) i3 Q, D/ j# x& A- q! ?$ ^
Suppose 1-6> 7-12) c/ c& \( r" G0 ~
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1-3 vs 4-6
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Then Weight the Third
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. H# P& R' T; y; {/ j: N0 l  dSuppose 4-6 > 1-3. {1 H+ i6 t9 M7 G  ?/ g& [
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Just like the first Step* M0 U, k$ T- W6 E4 f+ w
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4 vs 5
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; B0 i% U- [8 s; U1 t" Dif 4=5 6 is the fake one 5 R! L% d, v+ j2 [0 H# O

4 `! N5 y! f8 H* t  ~. Bif 4>5  4 is the fake one
5 \9 w/ U; s+ K* F5 U( sand so on......................

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問題第二步
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& G  Y. x3 s; b% M# iWeight 1:  1-6> 7-126 q# E9 p: V& V% L, ]

& l# ]1 [$ w- E4 n9 B: }5 SWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6% `/ c  y5 Q* [) K4 r1 M  b
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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 " l0 `4 R, l- J) w

8 ?! [0 ]* n- v- L5 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