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% M7 _$ L) k9 V- f9 V1 D

, k9 ~8 }0 i7 H3 U. _; H『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)。
. g5 X- Q1 Y3 n6 d( E. j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  @5 `1 M& k! }4 i6 w

& r: O& }, l' E. w; K1 m6 w注意: 0 P# Z% Z: f) z3 e. \* Z
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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/ ]; W0 t) I$ \* N* U, I5 y, A  N

8 H2 O- D  I9 ~6 m2 g9 C7 K. D2. 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7 P8 U; i# ^2 A1 {( m4 T7 D6 o
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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:
) e/ ^0 Y3 b0 r0 P0 @相信e條題目都有吾少人玩...

9 S- Y! g! Z/ [; D! I我以前畫左個chart去答,
$ _4 G/ x. ?! |% D+ r9 b& k0 P等我搵下仲在吾在' `* V# ^) F) ~7 N9 }" v

7 {# ^" F  l3 X5 v4 h* m7 |當日用左37分鐘答１２粒波子，差７分鐘才合格。
5 d* `! i4 Q3 P7 @  w& k9 p4 Q13.........
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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:7 Z# V& ?; k; R/ C' I6 C, Q) b) L* Y

% o2 F! W: i  V* T0 T我以前畫左個chart去答,
8 p$ c6 C6 `( k2 y( G- Q0 ^/ c" z; ~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:
9 Q% x+ f  E) r; Y* `唔識隱藏...已經諗到..

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sor !!!....e加改左3 ~% q6 ]  y& V* ^  |' S; Z

2 i2 B1 `; R; ?6 b+ N+ U8 Z2. 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* g. a" l' R& _0 P+ f& ]
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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:1 p0 O/ B. }; m# h' V' Y$ P
相信e條題目都有吾少人玩...

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5 G* p% S' ]5 W( c0 {PlayPlay, Let me know later who has the right answer and I will add points accordingly.+ }9 a( l3 e7 x9 a

- N& I( u2 U$ S6 lThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- }: B3 z7 U8 {) ~
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.0 [+ J4 s1 X# U& l6 r' F& p

. i8 Y1 T9 x& ^- r; yThanks

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  U0 C4 X# L0 h8 S6 i7 D不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
4 ^  h5 z1 q5 |+ \; c1-6 vs 7-122 L8 y2 }# w. W2 F# `- m& `
if 1-6 = 7-12     13 is fake. X2 U- Q  K) `+ V- B

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9 W: V9 G* v* }9 ?7 sWeight the 2 time
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) F4 T" \. D8 e+ x9 vSuppose 1-6> 7-121 P. r% T" X  x# A) `
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3  {# d' ^% u& Q; {% E

8 B2 X0 M# E1 d1 YJust like the first Step. p3 z; B. p/ s6 X& c: {0 x
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4 vs 5
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+ q% \5 q. }5 tif 4=5 6 is the fake one
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" A1 H  z' Z) G3 g: P! dif 4>5  4 is the fake one
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' o% i/ U( b  x' m- z7 T; Yand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
) q9 p$ e1 l+ }5 L* y& w  P0 t5 E2 qGroup B: 5,6,7,8
0 n4 F( ]7 z7 E% G: ^8 \Group C: 9,10,11,12
, [4 b& @8 a4 i) w& NGroup D: 133 x" f7 c& m) b5 e4 Y% t+ S

) _3 Q' W- _) YRound 17 x& x+ C* R: |0 c
Group A vs Group B2 K) p" H+ {7 F( e9 C
如A and B一樣, 即較輕一粒在Group C or D
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" u, t4 ^0 Y( {% Z! ERound 2
3 ^. j1 D- B* C! u+ w, W再在Group C拆成:
  Y: B( g9 |8 R3 eGroup Ca: 9,100 _1 m- p3 r/ `' g, `; l  g0 V
Group Cb: 11,122 p4 ]1 k* S( O+ L1 e) q, z0 h
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, ) a9 A/ Y0 C6 N9 r  v7 i
要再秤, Round 3, 之後便知答案.( P% c8 U1 Y: K  [
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e.g. #1 假設10為較輕的一粒2 W) n2 P& a: b* i, K3 ^6 J! i
Round 1
- o0 G1 W; m* [1 q8 J; \, K1,2,3,4 vs 5,6,7,8 = equal- ?: j) E( C6 H6 d

3 h$ A/ p. Q( ERound 27 W, F# v/ `) |8 |7 B& W5 A% ~
9,10 vs 11,12 = 9,10 < 11,12) i) v2 b+ _" d7 x
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Round 3+ Z9 G  H$ R" t# P- F3 Y
9 vs 10 = 9 > 10& ]2 B; a: I" ]7 M3 ^

8 |" B) }& y' o4 kThe answer is 10.
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e.g. #2 假設7為較輕的一粒2 i1 \, g+ E0 m5 m7 {$ H) {6 W
Round 1' o1 H! h$ J& k! j+ O" ]
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
: ~- d7 [9 l& V5 O, f5,6 vs 7,8 = 5,6 > 7,85 b! m& ~1 r0 ~5 W! `1 U$ k! A
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Round 3* y+ A- I! |5 Z/ g) U* l+ a; {% ]
7 vs 8 = 7 < 8) ^  U% j: n; n
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The answer is 7.9 G! L( c5 g4 ~; h' j9 U; f( l
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e.g. #3 假設13為較輕的一粒
# g+ X7 r0 r4 J5 v, {  H% e% kRound 1
3 N9 g0 z8 }8 f0 G7 G1,2,3,4 vs 5,6,7,8 = equal: E; v5 u0 j! t; l% A$ [8 F

  H8 {, z, F* p6 ~Round 22 g/ r. e5 L+ r) Z! \
9,10 vs 11,12 = equal
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No Round 3; e: N) l( v0 E9 S
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The answer is 13.1 }0 D8 f. P# Z9 E; i

  z- K* i" ?4 X3 o: u唔知我答得正唔正確呢?! . E3 `' {6 _- w
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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:4 T2 [" ]& e7 S7 M9 m2 X3 t
1.
& _& K' m; o' g# c- v1-6 vs 7-123 k* j! A% U8 y( @7 z4 G
if 1-6 = 7-12     13 is fake
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if not
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+ t6 E5 |: ~4 E3 d+ v' dWeight the 2 time 6 C0 `9 T* S- Q5 p3 E/ ?$ w5 H0 Q

" h, y+ d) T- D; \, U/ KSuppose 1-6> 7-12; r" D: D3 M! s% r: g9 e8 z% P$ V" R; p/ W
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1-3 vs 4-6 ) M3 V* i5 D4 z( F1 g& T
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Then Weight the Third
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+ i8 B& ?, X7 q* E- g8 C8 ISuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 . S1 N5 q. s2 i1 q# D

( [& @; C% e! |if 4=5 6 is the fake one ) P3 A9 Q% b2 R! l0 P4 u% ?6 t

* ?+ b/ c6 J& d# Cif 4>5  4 is the fake one 3 T5 {; x' k0 j8 I, g# Z
and so on......................

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問題第二步
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8 z( [! m- M7 P0 R4 _Weight 1:  1-6> 7-127 l2 i5 |7 F3 b. p% F7 t

7 }% W  Z! ~! \6 F2 q7 CWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6$ A* P% x8 `& `; N
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你第三步点去搵 7-12 边一粒???
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, x5 y. a1 b0 Q$ L; j# J7 g========================================
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問題第三步) t8 k$ J( F; E& a4 I1 f
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Weight 1:  1-6> 7-128 Y: m/ Y: s# ?0 M
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Weight 2:  4-6 > 1-3 ( G2 A- ]' i* n, s5 \  m$ O* ?

2 T. y5 l" ?1 I( j. C0 u8 _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