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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' n# H8 I/ Y- F% r  J; K7 A9 F『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)。1 T3 ~/ P" J, W
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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+ Z+ Q' u( F/ l% X9 u. T2 P1. 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6 P$ k  Z# }% j; V9 `# L2 @, q. T: N

. N' r0 O2 g) O/ Y! u9 a2. 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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5 C" Q9 p/ H0 p6 A# F[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' N( q3 E3 [: b% P$ f# z' f相信e條題目都有吾少人玩...

& f: N/ |2 r  S$ q; G我以前畫左個chart去答,7 j) r3 D- U; F5 M/ `4 E
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。( S9 f( k, G8 d) Y: y( u1 ^0 A
13.........2 ]3 R7 x: C+ R7 [5 p: m* c

& }2 |( z2 I) w, y8 ]3 U[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:5 \6 S7 E2 p8 x! ?

2 e0 M$ e+ N3 K$ q0 o1 B- X我以前畫左個chart去答,
! O" Y" s8 Q8 j) X% e等我搵下...

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. U2 M! C* `( c/ p2 i3 \4 B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:1 N1 r1 l8 ~& @% H
唔識隱藏...已經諗到..

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sor !!!....e加改左( O; T( n6 [+ \3 \

9 A4 r% t! n+ O" Z8 f9 I$ J$ B2. 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/ O" s* _0 t. A+ l+ M
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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:/ k0 j' n. C8 j+ F! f
相信e條題目都有吾少人玩...

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& p2 w: i( Q; z; ?PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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$ Q, y3 x4 x! ^) D- MThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ w* v- U, ~9 Q3 }# ^8 R
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. O% ~6 W3 k& a+ {* C% LPlayPlay, Let me know later who has the right answer and I will add points accordingly.. J/ ~0 ]. a; a* g

' Y* P! Y7 Q# H# vThanks

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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.
) t5 E) m0 A( l6 c1 A$ R1-6 vs 7-12
5 h/ v: v) p, @5 Bif 1-6 = 7-12     13 is fake- }$ A" S1 S, x! ~
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if not
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Weight the 2 time 5 t' h9 ?; R7 _8 X( a! s& Z

- V3 h# \% F/ W; v- G1 z7 ]; i* GSuppose 1-6> 7-12: z& x: S8 A! `1 K& [) r

! Q; K1 j$ e0 H. X1-3 vs 4-6 5 X1 y3 ]! b! ?  R" n7 P% ]
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Then Weight the Third1 U; b1 [" P" v
3.
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Suppose 4-6 > 1-31 d, z/ L. Y5 g4 M2 Q+ h
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Just like the first Step
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3 n4 ], U) u& ?. G; `9 \- e4 vs 5
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if 4=5 6 is the fake one ' c! u+ v' {0 @) Q

/ l- |5 I) `: N, o8 }" N! Fif 4>5  4 is the fake one
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- l5 g, Q/ L( A3 b# L# j$ yand so on......................

hello1997

分3組4隻波子秤5 _' n  P2 i# x6 G" L

! v0 I, q4 i0 v$ w9 p7 UGroup A: 1,2,3,4- M6 s! s8 J$ I- ?% o% h1 ?
Group B: 5,6,7,8
: s, C8 ]% O$ R. cGroup C: 9,10,11,12
7 {' @; D- f4 h* \' V! aGroup D: 13( U/ p' B4 @" O# |3 ], t
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Round 1
6 O1 c- ?/ X, W$ t' Z1 yGroup A vs Group B7 D7 g7 G) S2 I
如A and B一樣, 即較輕一粒在Group C or D- ]" U$ m' a0 b+ c  y# \  R) r
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Round 2% I$ u& f/ l' ~0 n' F0 @
再在Group C拆成:
  K9 W+ Y; B5 _! RGroup Ca: 9,10
' _) N8 M. q0 z, M% }) M7 wGroup Cb: 11,124 Y7 |, s; f7 ]$ M! ?
然後再秤, 如一樣, 即13為較輕一粒.7 s5 {0 w% x% r8 F3 s4 d1 a
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如不同, 即較輕一組有一粒較輕波子在其中, 5 \2 {7 W5 F' ]4 ^4 i" d
要再秤, Round 3, 之後便知答案.& a% z% @4 o4 r2 v2 O) }
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e.g. #1 假設10為較輕的一粒
- A) n! R4 |6 R& _Round 1
9 v& h% |% T% B* K, ]% B1,2,3,4 vs 5,6,7,8 = equal
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Round 2/ j4 }- k' K8 a$ ]" F
9,10 vs 11,12 = 9,10 < 11,127 \8 R9 Q$ }7 z

+ Z0 L7 G1 \6 W+ B3 ^" z' F" [* WRound 3) Y; s3 g" o- q
9 vs 10 = 9 > 10$ `, c8 F' q4 B, _
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The answer is 10.# E  L9 ]# v; i' J. f6 a5 j3 Q$ r

! o# w# r; j/ u# s( je.g. #2 假設7為較輕的一粒
$ R% X* A9 i# n/ cRound 1
# A4 f4 p+ V% ~# K! C4 H4 q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
1 o- v/ |5 @3 j$ h% ]" H; T0 r5,6 vs 7,8 = 5,6 > 7,88 \' {) {+ C+ b0 W+ {
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Round 32 b+ j6 U4 z* S' O# F# C0 X
7 vs 8 = 7 < 8
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) q8 a: ]/ r3 ]$ r9 s' OThe answer is 7.  \; \& A" K4 w% @

% v% H3 `7 Q% |9 T; d: A  e9 ee.g. #3 假設13為較輕的一粒
% A1 M; m& H# c0 n8 q# B6 F5 wRound 1, b: a+ {( \4 `) F. a" t1 r
1,2,3,4 vs 5,6,7,8 = equal1 V; d# J7 P5 V2 l  j/ `) U" Z
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Round 2: _& i# G/ ^6 e7 v2 R
9,10 vs 11,12 = equal0 g9 i3 X9 A! z0 h1 z, |

5 {/ \2 f  n5 WNo Round 3) a, d% K/ {! t  D
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The answer is 13.6 A6 y) V: Q! p) k, m
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唔知我答得正唔正確呢?! 8 a* k; J& f. f( }
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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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8 b, \/ f1 C$ o- `' I8 B1-6 vs 7-12
' U* @  l! x& C' \if 1-6 = 7-12     13 is fake1 ?! {) [9 J0 s' u

4 c% p2 H; r+ M* Qif not
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Weight the 2 time 4 r5 s4 k0 {3 o
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Suppose 1-6> 7-12
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1-3 vs 4-6
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" J, ]& f8 N; I  |8 R& ^+ QThen Weight the Third
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9 {  e% G* s4 f/ }- H. W2 q0 oSuppose 4-6 > 1-3" |* U' S, u! i/ h
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Just like the first Step# g8 o) Q0 Z% `
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4 vs 5
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7 F6 [9 n$ P- [- c2 P# eif 4=5 6 is the fake one
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if 4>5  4 is the fake one 4 [1 E; f6 V! O; I' k9 [  Z1 F6 L
and so on......................

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問題第二步# n+ V1 b0 V' x1 }5 ?7 w$ Q/ n
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Weight 1:  1-6> 7-126 z! m6 o: k9 L) \; j

7 K  n/ g# B! E6 O: W' A: l0 e9 tWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6& l# W- j7 p1 [* e- c0 p% ^  Z
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你第三步点去搵 7-12 边一粒???1 p7 _8 |/ j  y
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' S- c/ w$ C2 [4 B5 X6 t. n問題第三步& j7 g* ]8 s+ r2 T& S6 q3 a! @3 }

' l! _& D: s- J3 X1 Q1 LWeight 1:  1-6> 7-12/ g6 \" v! j) E  Z+ e: g
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Weight 2:  4-6 > 1-3 & F; {# R! c& l: h$ e3 Y
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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