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3 J, T- H! d! V& c0 h
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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)。0 o) f8 x8 u7 T% c. w& F1 T" z
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？』" R* X& `% q* E8 i3 J( y. N* a/ h' }

3 R3 d4 y, H. z! m注意: # c" k$ v! M2 W2 B4 C
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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
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2 d8 z' Y! j: S; f7 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  , hide 字要連埋 , 內容 = 答案
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0 B; p+ u' L, ~+ p, H" i[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
5 n( l; `7 B- u, L+ J- j- C$ l# h相信e條題目都有吾少人玩...

1 b( j6 y7 T8 x/ ~我以前畫左個chart去答,
5 X; J9 s8 r, p( D% D  Q7 l) i8 X等我搵下仲在吾在6 ~6 `. B2 ], Q0 [8 p

9 O1 W# h6 R2 ^) [當日用左37分鐘答１２粒波子，差７分鐘才合格。  t, N1 c: t' i, A0 Z7 ^8 ?9 X
13.........
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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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1 S, o( Y( D( Z6 V( ?( g8 ?( r; B我以前畫左個chart去答,
  B0 _( @" F) M" v. z) G等我搵下...

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: g- j4 N  L/ q. k- c0 F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:
' D" z# U# o: X: h4 C唔識隱藏...已經諗到..

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sor !!!....e加改左  \6 C0 i* f; o9 N

1 o# ~- A6 N% @1 H) l5 J6 |1 |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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( `5 J/ n# f! C* p0 E9 |[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
: b1 w2 g: A. b) N( r( l! A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.8 s( J+ R! l' D% d; E

! ?4 r0 B4 _4 v  ^+ @# D3 j* lThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:* N1 x+ x7 k: |; t  X4 t7 ~

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, p; V1 q, |) u1 T4 D( oPlayPlay, Let me know later who has the right answer and I will add points accordingly.: k2 c8 \/ k: @9 z9 d& ~6 u

* B/ l; r: Y7 ~- G: MThanks

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6 ]% s3 G$ ]( |# [不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
8 |8 f6 v) r5 f. M1-6 vs 7-12) S  l; k$ L  X' A5 i( \; e
if 1-6 = 7-12     13 is fake
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4 e$ x: j+ |4 _if not
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. |$ q3 l" U2 c' @. PWeight the 2 time
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/ [, A- o2 M' e  ^* ZSuppose 1-6> 7-12# M: r( x/ g/ P, o% K, H5 B' d

' L+ L  s2 y6 S" f6 D. X- B: K1-3 vs 4-6
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4 J2 d! N) x0 N- J; ^Then Weight the Third
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Suppose 4-6 > 1-3+ H( n" I* h8 [) ]

5 P5 y0 u% w1 U8 ~* u; E) Z% M/ bJust like the first Step0 ~2 O- ~* Q, S! C$ T5 U! J

( z" o1 U3 `* {0 S% t1 E$ n0 {* l4 vs 5 " H2 h3 K( C2 @8 S, \

6 r" l6 u6 H' u1 X; g0 kif 4=5 6 is the fake one
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9 y# R( E$ n$ T; C' K+ Xif 4>5  4 is the fake one
4 {5 A5 {2 n6 F' ?# Z& a  ~% ~0 L6 I, _1 z5 l0 i/ p5 E- L
and so on......................

hello1997

分3組4隻波子秤# @$ ?& y% @# E$ j5 @# q

2 V3 d- ~; ?* c0 w1 a6 u' I* wGroup A: 1,2,3,4
) I8 B: ]# g) R3 k6 m# ]7 n: IGroup B: 5,6,7,89 E2 z( W  ~0 j3 n
Group C: 9,10,11,12
- ]8 X' u" c/ P/ C0 S* @Group D: 130 i0 Y( v( p( @% C2 g
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Round 1* b# p7 t% s1 C
Group A vs Group B
7 b; B6 R/ y# [& \/ ~8 y. y如A and B一樣, 即較輕一粒在Group C or D" M4 d& y0 X$ H" a7 y' G
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Round 2, ~( T; j3 v3 z+ K" V
再在Group C拆成:
: f* V0 Q5 \5 d, sGroup Ca: 9,10
! A: d( z( H2 u! z& \Group Cb: 11,12- W+ G" M# C! V
然後再秤, 如一樣, 即13為較輕一粒.
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1 H% d- X* M' b" O8 S如不同, 即較輕一組有一粒較輕波子在其中, & K- Z$ f$ ?8 G6 d
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
2 K) |  N  U) V9 URound 1
, G- K) ?- X0 u! e1 t  K+ E1,2,3,4 vs 5,6,7,8 = equal3 C) D2 i1 `: _8 k3 G4 k- u

) V7 @4 A, K$ J! a) TRound 2
0 E; O! P, Z) G& m, {2 M9,10 vs 11,12 = 9,10 < 11,12
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Round 33 ~/ S) E2 Q8 B. m
9 vs 10 = 9 > 10
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The answer is 10.
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9 M) J0 B) e, z: y5 e1 f8 Ie.g. #2 假設7為較輕的一粒7 c& g( h2 d5 {2 ^, o' H- d
Round 1/ v6 P& F) G& s$ b' |
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8$ B1 a$ H2 W# G3 L0 f

4 L2 n. y3 d- `Round 2! n* I. L0 A8 O; g6 v
5,6 vs 7,8 = 5,6 > 7,84 ~" c1 L  [- r( F9 S, T

, |; Q" q- D0 G! U/ ORound 3
. X1 ]# `, C0 y' I; _3 }6 p& ?7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
* L) Q0 o& o* @- t6 ZRound 1( G  D- }) f7 h. n
1,2,3,4 vs 5,6,7,8 = equal
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9 _0 q6 Y4 m6 X  z8 F& w/ l* kRound 2
) K( T2 T+ T- j" ?1 S, e9,10 vs 11,12 = equal* @7 M) s7 }6 v7 W) Y

: \5 e% d4 E, v" c. }% ~No Round 3
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The answer is 13.5 \& ^$ d9 G/ F/ N' G( g

  c+ m; @, S- N! ^% N唔知我答得正唔正確呢?! . G  x8 `$ k) A8 v  V8 `2 c. v% q

$ y7 {1 N, U, ?9 R[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:9 `% r$ \4 N6 `+ A) O+ x  {" T
1.
9 o, O( z: R0 K  u7 A" m+ v1-6 vs 7-12- i7 r' L5 f, ~8 @* V7 T1 n' O
if 1-6 = 7-12     13 is fake
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if not
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  N2 [  M+ w9 YWeight the 2 time & ]5 ~. B) _4 w9 c; b
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Suppose 1-6> 7-12
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1-3 vs 4-6 3 \6 G9 H4 x- P8 ?
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Then Weight the Third" z1 C0 X4 S: D
3.
' ?# z# E# S4 a6 T$ ?8 v" R3 V: u- a% I0 N6 p) {' ^
Suppose 4-6 > 1-3, @  ~3 u4 X1 [0 g/ ]) X

- U) a5 F: t+ n) B: \( XJust like the first Step7 F0 r  b5 l0 P9 L' b6 J1 C- e

+ D7 b. W! N5 l4 vs 5
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if 4=5 6 is the fake one
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$ B# ^& B5 m6 J7 Dif 4>5  4 is the fake one % R2 C- a0 p2 @* E$ x" S+ ^
and so on......................

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( l- g+ m) n" V& U問題第二步+ g% H( L2 u) |% ]/ i$ l6 O7 I4 c+ r
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Weight 1:  1-6> 7-12' K4 o' c! J5 M* C- `: D! Z

# z0 A/ C3 D" g2 y/ OWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6) w. O7 x( l/ c" f8 o
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你第三步点去搵 7-12 边一粒???0 A; o0 B/ U3 e8 [

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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
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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