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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  |" x/ w* D- B. z, ]/ z9 ^『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 z/ ~( o' n: h* m- O% T
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: ( V. a) _) l' K% B) S

2 V4 c3 p1 U% _, u4 ~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- d) t1 `  m& E( M" ~4 E+ S. D
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
" i$ k4 j% L$ N5 V' L相信e條題目都有吾少人玩...

. u: r$ q5 v% L" K我以前畫左個chart去答,2 }, x" b! k2 E
等我搵下仲在吾在% Z5 |7 X' M8 u

( i' H+ T( y" _+ m- W當日用左37分鐘答１２粒波子，差７分鐘才合格。( k1 k* a" _$ J' ^1 ]& M
13.........
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/ F0 ]5 H- g$ b* D" U3 k[ 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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1 t8 @- V/ `/ M# T. Z我以前畫左個chart去答,
% ^2 c( l  O' v, o" a! o等我搵下...

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8 ?. q! q* }" B) K9 m% I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:3 f/ k. s& c0 t8 D" q& i+ h8 S
唔識隱藏...已經諗到..

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sor !!!....e加改左9 r& w, }0 t5 Z- `2 t

2 t5 R" v, C5 B/ u% o3 m, u: r; j2. 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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$ m0 O9 `, f- N  f8 l[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
% V1 Z  M: p8 y相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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7 h  H) \9 y: F) Y# k/ kThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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5 g6 Q% P6 l6 I0 yPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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' @* v  G  b% F1 N+ P: k% C. M不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12( p) M! ]( X) u* b, ~: p- Z* G
if 1-6 = 7-12     13 is fake2 K! ^  X6 @/ e. N2 i6 @

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; R, @" O! n8 @" @% {& iWeight the 2 time 6 @' R5 b3 }7 ~: H. R- W6 }

6 \, o# W$ x9 t/ l" U; BSuppose 1-6> 7-12. @* l! p: i* L  _2 m$ @

/ W2 S; Z' I1 r' P5 }0 w0 g1-3 vs 4-6 " x$ o5 y* X/ l, D
  F6 k/ Y) d" y1 ]1 R! _! \0 j
Then Weight the Third% `7 D7 v$ ~: T2 s4 q- L
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Suppose 4-6 > 1-31 C7 L" D' K8 \/ [6 P& J4 l) B
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Just like the first Step
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+ }' h( V7 t4 R' Z2 W' K$ J# f" l4 vs 5
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( ?( r3 Q  g. o7 Fif 4=5 6 is the fake one - U; B6 ~3 H8 v& l$ ^2 a
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if 4>5  4 is the fake one - ?3 u9 Q5 Z9 J( N- m( A- l

7 C5 h  J! M4 I) m3 wand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,46 X$ e  s& e; @7 G6 C, c0 \3 s
Group B: 5,6,7,8
+ i- _: r& ~& t+ i1 AGroup C: 9,10,11,12& y7 |' }4 L) b+ _0 E% @9 E
Group D: 13
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Round 1
( j% h: ?) T" m1 D1 E7 Q) ?- SGroup A vs Group B
8 b( g. C' q0 J* q' x如A and B一樣, 即較輕一粒在Group C or D
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. k6 R2 g+ G" @% u* ZRound 2
- {8 d: V2 ~& Z3 l% P6 E$ [. ]0 ]再在Group C拆成:' D& W3 Q, i2 X/ h% R9 k
Group Ca: 9,10
5 H9 X5 q# X; V6 pGroup Cb: 11,12
6 K7 R. F3 J: Q7 }, i# h然後再秤, 如一樣, 即13為較輕一粒.
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2 Z3 I6 |! C  z) }如不同, 即較輕一組有一粒較輕波子在其中,
+ j( ]4 [! ]; w% C: g$ d% @要再秤, Round 3, 之後便知答案.  `1 Z' A* _5 P0 `. O
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e.g. #1 假設10為較輕的一粒
* L% J5 o1 k, m8 sRound 15 I9 K6 ]7 l$ n6 X4 d
1,2,3,4 vs 5,6,7,8 = equal5 s- z8 W5 ]( R
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Round 26 |4 ~) T" |9 Z1 m; a8 H1 `
9,10 vs 11,12 = 9,10 < 11,12/ T( b, Y+ \0 _4 V
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Round 3
0 }! w5 P4 T; o# ?6 r$ {9 vs 10 = 9 > 10) n" ]$ p( [' m' q: G2 x" s
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The answer is 10./ Z' N$ R4 Z' r6 ?  b# N7 J
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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" `) Y- f: n. ARound 2
' R8 v3 Y3 y- p+ Y; w" W5,6 vs 7,8 = 5,6 > 7,8
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Round 3
, L. c" G" p" [' @, ^' p7 vs 8 = 7 < 8  O: W; e& M, D

. @! l. ?% S/ g" ^3 pThe answer is 7.  M$ Q) J' s4 z0 v. ~& G
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e.g. #3 假設13為較輕的一粒* q7 I& d2 A9 C$ k$ j
Round 1
, n( F3 ^& M2 f6 U1,2,3,4 vs 5,6,7,8 = equal
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* Z2 A1 u+ z3 q5 V5 S' m0 L/ {Round 2; d3 B  N) p; {& M
9,10 vs 11,12 = equal- |7 W9 E5 O2 W$ @- a/ |
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No Round 34 e! S: t# |; X3 r  v3 e) |, ^( D
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The answer is 13.
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( U7 r+ v- D3 v( b( v+ ^唔知我答得正唔正確呢?! & U" {3 Z3 j4 [# [0 o. }7 {/ b2 Q
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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:
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1-6 vs 7-12* A7 Q+ ?! }5 C7 s( ]4 }' M3 n' A
if 1-6 = 7-12     13 is fake5 z1 C3 d- z  ^: s3 c
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if not
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Weight the 2 time 5 i$ c- ^$ ~% I/ t/ ^: b  i9 u
2 G( j! b7 b0 U" T6 e" {8 p
Suppose 1-6> 7-12
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1-3 vs 4-6 . U+ M. N$ F( X' j9 Z; p$ M

. i0 x5 s1 S8 H9 \7 LThen Weight the Third: _7 x+ }! u% h" ~+ M. c1 }
3.# x+ A& d+ _' F4 @% D1 b" n

) H4 K  C4 B4 G2 a/ V: YSuppose 4-6 > 1-3/ B& r/ P* S) g- b8 K" }! ~
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
3 k" d' L4 s) D( Eand so on......................

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問題第二步
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( j' ]; Z7 I. B7 B# M: [Weight 1:  1-6> 7-126 t# _! V/ S" V* r$ Z
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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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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Weight 1:  1-6> 7-12
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' G2 @- R5 D' Q; R/ V4 p3 W4 JWeight 2:  4-6 > 1-3 - N) B0 I0 I, x
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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