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0 g% n  t# G$ U
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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)。: O+ U2 ^- U9 b3 X4 D1 A* u" d# _
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:
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( \* d/ A: ~9 c# T) B1. 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. F% P/ s; M- O7 ^$ S* q, ~8 x. X0 ~

* l" \3 \- G# o, s  o) J6 i[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 L5 \7 ~* u9 @6 Y# c相信e條題目都有吾少人玩...

+ e$ s4 V5 O  ~; ?, X我以前畫左個chart去答,
2 @) L/ ~$ J* p' @8 h等我搵下仲在吾在
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8 ?* v& r' V3 h; M6 C, B當日用左37分鐘答１２粒波子，差７分鐘才合格。
' S. ]5 [4 @5 T+ u0 i! \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:* H! a1 s: g; k) C0 M

; ^6 g  u7 w3 `/ R- V! a我以前畫左個chart去答,- k' m) F7 c' P( U% n& K3 W) s/ S
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:
# |$ i) z  ^' d! q1 z唔識隱藏...已經諗到..

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sor !!!....e加改左7 l/ F2 A4 N7 z. B
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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$ h1 S  U1 ]' V6 e2 w1 y$ I/ l

  f* G2 c$ e0 ^2 v- F9 g5 D[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
" H1 S' Q+ {" z3 s( |& R5 h: \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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. |& N4 X6 n9 J  p. aThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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: ]9 q* u5 N8 @) K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! b" `* D  _- N+ ~: J
if 1-6 = 7-12     13 is fake- }# D0 a3 z) m8 K( Y) T' U( Y

: Y8 x9 e7 p  a9 zif not ( s. ]1 ^- _: S8 \( V. a

% i( [* U6 T( ~5 \" xWeight the 2 time
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' T; O* k8 ?0 LSuppose 1-6> 7-128 s/ [, @$ n( T3 M
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1-3 vs 4-6 / t0 C& ]) ^4 L) U' p  a! F

1 \2 D* x2 V4 FThen Weight the Third
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3 M! a; S) I1 [; CSuppose 4-6 > 1-3( v" O6 `* t3 B: P* a: a
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Just like the first Step' b& c8 ^! v9 ~+ k
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4 vs 5 ; P6 @6 M# D2 |5 W" R
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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* ]' @7 j& o, o6 {) Xand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
% c5 B! |8 O0 C) W' U. T9 m- LGroup B: 5,6,7,8; f5 O+ T9 }8 o( ]" l
Group C: 9,10,11,12) l( k4 U6 M: f6 E. X0 n! `( S
Group D: 13
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0 E  {$ q( K" }7 F7 JRound 1
$ B2 o! b( M( A6 K8 R" p: hGroup A vs Group B
! X* J. y( R. C6 [" t7 }& R% B如A and B一樣, 即較輕一粒在Group C or D1 l4 V# Y# t1 [+ a% \+ k1 O
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Round 23 y; f9 i: R/ `
再在Group C拆成:
6 R/ F; R' y2 G: S# F' e. ]Group Ca: 9,10# N+ Y/ n7 z. l
Group Cb: 11,12( W$ w) K6 [1 M6 o" Z
然後再秤, 如一樣, 即13為較輕一粒.
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. b7 |0 L4 S% o- z- B0 H如不同, 即較輕一組有一粒較輕波子在其中,
8 s, R% y6 l& I; s& h9 ^" ~# @要再秤, Round 3, 之後便知答案.& T" I, Y2 J) ?# O0 H) ^$ u+ h& Y

, C6 |% y! a% U) O4 R3 E; f3 Ye.g. #1 假設10為較輕的一粒
2 ^4 j6 S: J- qRound 1
( v# V/ @7 U# e7 C7 I+ J' |& [1,2,3,4 vs 5,6,7,8 = equal
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Round 2
7 [* U! t* y/ ]) n$ z9,10 vs 11,12 = 9,10 < 11,124 D2 E/ w6 S/ j4 r/ \
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Round 3
' N% {6 k( g; Z- j  ^5 M- m5 ~. @9 vs 10 = 9 > 10- }8 h' k  M3 f6 W8 s

( w3 F  o: e( L" }+ j3 PThe answer is 10.; D* ?  g3 ~6 W8 C

/ S: u% I3 Y' _6 Xe.g. #2 假設7為較輕的一粒! {' `' }/ j: ^1 h
Round 1
( D. q& ~$ y  y) ?, B; D1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
2 g& O7 l8 |2 \! c" ]7 @5,6 vs 7,8 = 5,6 > 7,8/ h" ~. ~0 j9 E) n7 p* O5 p: @" a, k
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Round 3" {" i" X& P1 g3 D
7 vs 8 = 7 < 8) ~8 v  ]3 x5 Q6 X' |

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) k# Q3 k* o; [6 B8 u$ ue.g. #3 假設13為較輕的一粒
. [3 S0 z$ a% @3 l$ _, G6 R1 oRound 1; C1 V% g* {% N; [0 g1 N* ^4 S
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
% P% q& J  W8 l$ o9,10 vs 11,12 = equal
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No Round 3
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  f: q( U" Q8 o( Z: S) P) \: OThe answer is 13.& Y7 T9 J$ G# u( l8 s" m9 }& I3 P

- r, {' s3 [9 A7 A% v唔知我答得正唔正確呢?! 4 x1 E3 h+ |% l. r# _3 c" @+ m, s" a

2 p5 e1 s' g) `: e' e% Q! q[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:! R' j$ y2 d$ X* C0 A
1./ L$ y4 }2 G& i
1-6 vs 7-125 r" ~1 w9 M/ i( J8 r  A: q
if 1-6 = 7-12     13 is fake) x& }7 `( g3 m' d! O$ X
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if not
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) d3 a" _5 V& q( ^, EWeight the 2 time # f/ F2 U& d" S

- H* d- \$ D  R" oSuppose 1-6> 7-12
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1-3 vs 4-6 % I0 i$ }2 w4 O3 b$ W- r

" ]/ n- x" }7 J' _9 E5 nThen Weight the Third. v& p  ?, F8 S1 h1 l; M1 D3 ~
3.
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8 x  k. |) a) I: K9 z5 k2 f% xSuppose 4-6 > 1-3
6 x* [0 f- F' R3 p6 |$ L, {7 d8 P/ g7 O2 \' J
Just like the first Step
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4 I; l/ [: n$ O8 X4 vs 5
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if 4=5 6 is the fake one 2 ~+ g' Q1 K, y7 W

2 R- Y/ v0 \4 b2 C) D. b7 @  fif 4>5  4 is the fake one
1 m0 _) w+ v0 F+ {% Eand so on......................

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問題第二步# n' ~7 T& C) {9 S# L
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Weight 1:  1-6> 7-12& ~& x! W+ K/ `7 E, f

0 M1 ~7 `* D+ l' ZWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6) N1 x2 E( d; X7 t: }
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你第三步点去搵 7-12 边一粒???' C  V1 `8 j. z# E- _- |

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- P* \  |; J! d問題第三步
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' l7 D: C6 g+ W6 sWeight 1:  1-6> 7-12
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7 X$ l9 R7 Y5 P9 XWeight 2:  4-6 > 1-3 % k9 `/ ~! C1 {/ N# \$ R
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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