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2 I. S' p  x  z7 r
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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)。+ W2 ^  c) o0 ^0 g6 C- 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？』
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5 P; Q% w+ e- E1 v9 P注意:
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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. 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  P* Y  ?& z9 c; f) B

( i0 k$ y8 Z9 X0 U  \9 M' w/ ]# B[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
+ ^6 Y8 Q: u* w2 _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,. F) |# F5 f6 Q3 c; j
等我搵下仲在吾在
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) ?5 f1 W3 d! Q% |( U2 N當日用左37分鐘答１２粒波子，差７分鐘才合格。9 }0 ]; j. ?# j2 F3 V
13.........$ B( J( [" @' Q. l

) j. B/ ?# V8 m9 j" P( a0 J1 J$ b[ 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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我以前畫左個chart去答,
8 A6 ^6 E: r3 M. T9 D+ Y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:- ?) d' A/ i. ], o" _4 w+ N, H. W
唔識隱藏...已經諗到..

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4 L+ A+ b( f# C# tsor !!!....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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2 `8 h6 {( s3 D5 J+ M& i) A[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
$ T9 }( Q5 }# {! r$ J" E6 u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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+ Y* k. p. a7 t0 @& m0 p# ~' FThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; v- W  ^8 ]2 n- ?

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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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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
4 P, |1 Y0 p* z& l: Lif 1-6 = 7-12     13 is fake( h$ v8 P0 A3 I0 x

, o/ x8 W5 Y8 a: ?if not 1 o/ Q2 S; c' w2 T$ _" E

% T! s% r% S5 w9 Z/ @1 p% |# fWeight the 2 time - T) R& T# Y% \

: }( |+ L, [- v- i  rSuppose 1-6> 7-12( w6 W2 B8 W( x, c$ ]
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1-3 vs 4-6
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Then Weight the Third
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- |% [( O% v* ?" J( }8 ISuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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6 M8 q. A7 m6 e! j" O& gif 4=5 6 is the fake one   z% o: ?5 A: s3 {5 V  ?
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if 4>5  4 is the fake one + g. i1 b: F: w/ n8 C! Z9 O) e, I

- N* N9 }1 o" {9 Gand so on......................

hello1997

分3組4隻波子秤
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/ V8 M# |: O; K. b7 i/ r  xGroup A: 1,2,3,48 o1 j# S; X; S
Group B: 5,6,7,8
5 c  b7 T+ T. KGroup C: 9,10,11,12: L  t) _7 e% {4 l4 ?
Group D: 13
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8 E( \/ C/ @( @) I" b9 SRound 16 ^4 I; ~. s: g5 R
Group A vs Group B
: }7 ?! @8 u' G6 y3 f; E如A and B一樣, 即較輕一粒在Group C or D
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Round 2! V* j7 ^; d6 ~6 W  M5 Q: P. }6 U
再在Group C拆成:& Y2 b5 V! G% l5 ?! r
Group Ca: 9,10
6 e0 A0 P4 J2 R" k& }0 jGroup Cb: 11,12
) u0 k, a5 b4 X! Z, ^+ O然後再秤, 如一樣, 即13為較輕一粒.
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4 L$ G3 ]! ~  _* ~% B0 [如不同, 即較輕一組有一粒較輕波子在其中, 7 g* r, V6 v* l5 `
要再秤, Round 3, 之後便知答案." y6 O( A% P$ C, }5 B6 h
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e.g. #1 假設10為較輕的一粒8 d- B8 r/ u! o# n  m
Round 10 n( }" l2 K8 f: B/ m) `  |
1,2,3,4 vs 5,6,7,8 = equal* X8 g; R6 M) V- ?0 A1 R0 A
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Round 2
; ?) V) g$ `: F9 h) m9,10 vs 11,12 = 9,10 < 11,12
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3 U1 V& |4 u/ X: ?% jRound 3
: V# V! I! _" v: G# Q9 vs 10 = 9 > 10
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3 J0 [0 C1 ~. h. P8 D1 sThe answer is 10.
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e.g. #2 假設7為較輕的一粒, h* w: ^/ g  u* I. \1 E. o: M
Round 19 w1 O# l/ H+ R, p" }( r& S
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, t# ?3 o( ^& R9 `- Z2 ?1 _
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Round 2+ x1 `; T/ W3 s+ y  Q
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
% k# U% `; a- D7 vs 8 = 7 < 8  S/ x! J/ J0 N, ?
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The answer is 7.
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e.g. #3 假設13為較輕的一粒' V8 [5 N4 }) \; h+ ?/ r
Round 1
! d, Y" v: a* S0 j1 T( G+ l1,2,3,4 vs 5,6,7,8 = equal2 B7 _0 T! N' v- ^! c6 I

; i- P6 j* Y9 J* H1 K0 QRound 2
9 N5 F( E+ ~, A, b7 U# l5 A9,10 vs 11,12 = equal  j. m4 S0 f7 ^% A

, }2 e1 B6 w3 ?- [) _9 @9 n$ |. N" PNo Round 30 n6 e# m8 @) a& d4 B2 V
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The answer is 13.
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唔知我答得正唔正確呢?! " d$ d3 S2 u! ~# r( v/ E

4 d- H$ }) D" Z% t* Y4 W: {9 n[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:( f  v9 p) l; \
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1-6 vs 7-12" E; |' n% _, g, p# h+ `. G+ f% ~
if 1-6 = 7-12     13 is fake
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Weight the 2 time , s6 K) ^0 F# T- U: @* J

1 j$ T# k5 i/ ]0 Z& y6 h9 rSuppose 1-6> 7-123 ^7 Z+ k( o/ |# }- s2 _

6 ?* W1 Z& C. q* S1-3 vs 4-6 # g$ z. ?( V2 |! X0 j5 @
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Then Weight the Third) ]; e: m7 z2 A6 \5 \
3.
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  u) a0 B, m5 q" n6 L  u: j( DSuppose 4-6 > 1-3! F. D3 G1 C$ `6 d0 u, m5 x# s

9 X$ e5 a1 o1 k: _/ E0 ?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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2 {. t" ]' N9 x) _if 4>5  4 is the fake one ! q6 I! V7 r0 R0 {1 H* O
and so on......................

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問題第二步. k4 \, I; |, F0 W) f

0 Y" k3 \* R* UWeight 1:  1-6> 7-12, `! p" w1 F) ~& Z. J" t+ \( d8 h
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6' }5 B3 _+ j: F/ K

) e9 u" v" a- [" ?) N你第三步点去搵 7-12 边一粒???: Z7 s; f, y/ \2 p/ b
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問題第三步8 x( j9 `7 C3 H0 }  D4 O

1 v: x2 x: @% J8 v# s% X1 DWeight 1:  1-6> 7-12$ v1 H: T' |. ~2 F

  o. u6 V8 g# U2 o0 T# m: o* o9 tWeight 2:  4-6 > 1-3 0 M& J8 k% p9 y# |  b2 M* H: P
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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