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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8 w, ^$ o- a% N& }4 O『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)。
& Q  W: [. Q. v/ K8 h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？』$ i' B4 A7 M& p5 v- w& P( E+ l
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注意:
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$ q0 o7 ~0 ~' |! `! ]. a# c- M3 r1. 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3 y0 n$ T" i% Z6 @/ E

9 r, i/ T3 @& _[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 \% B% N2 ~: I# A; A相信e條題目都有吾少人玩...

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我以前畫左個chart去答,4 y) B% ?* {; {6 S
等我搵下仲在吾在
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! ~; I! l  @2 X) X3 e3 e" C+ O: i1 B& M當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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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7 f0 F6 t2 k. N- C" V7 o我以前畫左個chart去答,0 g; _7 w+ }8 @9 t* ~7 J9 c, Y
等我搵下...

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) V7 ~$ t" ?( N( B' Z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:0 s+ e, O3 Z' g) W, t
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
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" Y! C) f9 i9 p2 o[ 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 _  v7 v4 H% a7 a" ]! r! F相信e條題目都有吾少人玩...

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7 t& O& l. V  c3 C7 Z4 o; P+ r, ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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/ y1 T' ?7 ]% n+ W# FThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. C; }! E- M4 K; M7 l, g: V
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.' L) b# U; c% N3 d! J7 f" D/ s2 s% H6 L' k

* X5 O8 u0 ^* yThanks

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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.
3 T! I2 K1 B3 _' h4 ^1-6 vs 7-12
% T7 l8 P2 F8 P& r4 ^if 1-6 = 7-12     13 is fake6 e. B# B! G. q, d

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Weight the 2 time
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Suppose 1-6> 7-12
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0 ?6 L9 I" b/ \( R1-3 vs 4-6 + c0 Y3 h+ h! V) {: ^1 G+ R

% ]; z4 ]9 p" j. Y, pThen Weight the Third2 m7 k  j3 A9 R$ |( w& q0 K; l
3.
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Suppose 4-6 > 1-3
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Just like the first Step+ N7 p4 b. p6 \; {

1 G# L) P3 v7 D, M4 vs 5
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3 `3 S' O# Z( n  S: v2 x: ^if 4=5 6 is the fake one 4 E# U/ v- C0 X8 V  C
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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1 U, M- ^& c$ i9 c6 N/ d; G, O9 I2 y( G

4 z) t1 d( ]! [8 K, HGroup A: 1,2,3,4
1 |+ a6 f8 `: C* V0 KGroup B: 5,6,7,8
2 n7 @2 ~( m( F, M0 S  ]Group C: 9,10,11,12. Q- Q, k+ z& F0 N
Group D: 13
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Round 1
1 F7 @5 W! s% ?, u6 l2 {Group A vs Group B0 ~8 q) E) b4 u+ p1 `0 e
如A and B一樣, 即較輕一粒在Group C or D( v# Y  w, O" t& e
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Round 2) _  L0 H/ J7 b& C/ r# t0 T* x; v
再在Group C拆成:
  J9 h9 r' S  m$ z4 }Group Ca: 9,10
* p' O) @6 s' F) AGroup Cb: 11,12' f! ]% S" q' O& N& R6 a( E; ~
然後再秤, 如一樣, 即13為較輕一粒.9 B2 L8 O. N, A
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如不同, 即較輕一組有一粒較輕波子在其中,
: r8 b: N4 V4 U- A7 A要再秤, Round 3, 之後便知答案.
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: q0 b9 d* Z; w3 j* i" j9 Te.g. #1 假設10為較輕的一粒
* V4 Y! H! [% a4 _$ D9 q/ I+ @Round 1
! |" G0 |, C5 L2 l# p5 u1,2,3,4 vs 5,6,7,8 = equal$ l, g( k2 k3 J& e

7 _1 y$ L1 }9 D3 tRound 20 e  p  S9 c) c% t' x$ H' z% t3 F* Y
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
/ A0 g5 _+ _( U3 t9 vs 10 = 9 > 10
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The answer is 10.
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/ ~) L% ~) U2 @# i  E2 `+ \8 Ae.g. #2 假設7為較輕的一粒* P: U6 [7 I1 w  ~4 N; r
Round 11 p% z: `+ K+ f' \
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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( A  Q$ J* W4 F0 Q7 D. bRound 2
" Q7 ^( Q7 v5 G5 M! H* R5,6 vs 7,8 = 5,6 > 7,8
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4 ~* d6 N. y7 W2 N' q; ~1 vRound 3
" D% ]! F" o/ r- h7 vs 8 = 7 < 8
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2 ]% G2 l% B8 D. uThe answer is 7." f" G. O$ {2 l. q
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e.g. #3 假設13為較輕的一粒
, I$ S: t. k6 C* f: B: cRound 1
( }- _* v6 l0 l9 |$ Z1 O1,2,3,4 vs 5,6,7,8 = equal
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Round 2
) O4 a2 }9 ^8 D' L1 X9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.6 B4 F, p; |4 ]" q  r8 Z$ a
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唔知我答得正唔正確呢?! % {' ~* Q! v, G; }3 T

$ x+ Y) s; i$ p" {: U[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:  u  C# e; n5 q: }
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1-6 vs 7-12
/ G1 S/ x" [6 \( |if 1-6 = 7-12     13 is fake3 P5 ~% s( l3 i6 m3 X! h. K

2 a9 a8 l8 I/ [  l' c. n! _if not
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Weight the 2 time % n9 [+ z9 y; \" k0 N
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Suppose 1-6> 7-121 k  j: J3 `1 K% y" n/ O* F

- l+ U& p+ I% w5 h. B1-3 vs 4-6 0 @2 W0 U) f$ g3 E5 G0 m4 k% H
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Then Weight the Third( a: \' Y( ^& c  [3 ]  Z+ P
3.
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4 s* m- [5 X/ j/ T$ Q1 r6 ?Suppose 4-6 > 1-36 h8 O# W( j; K4 C+ G; Q* g4 O* g, V

, w, H0 ?" y+ t6 e- s7 ~9 fJust like the first Step
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4 vs 5 + [( X% @4 `3 |' i: R8 h
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one * P1 t+ G) I1 d6 J8 a7 e& K
and so on......................

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問題第二步+ p0 r! r: ]( G; n
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Weight 1:  1-6> 7-12% w* o- t9 P5 m* `3 F% g3 _0 U/ h
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 n# f+ l( m2 n) C你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步
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# {6 E+ w/ w7 S" C" ?2 HWeight 1:  1-6> 7-12. z0 e, v; J2 ?* N8 N) V" ]$ B

) o& i' l; E5 n* n. ]' y) G7 r' fWeight 2:  4-6 > 1-3 / f3 N% H7 l% ?
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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