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! g  \2 r6 }- e- ?4 s+ ?& l

: c2 F% s+ y  Q6 @2 J% ]『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)。$ F; E6 l7 @) u4 [( J. b) x2 F
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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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6 i+ D4 u, E# `& v
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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" k- y* `) h" a: b! t相信e條題目都有吾少人玩...

' }5 L  D: Y2 i, I4 Y5 U, g6 ~我以前畫左個chart去答,+ W( Z! j/ W0 T; E* j9 o
等我搵下仲在吾在( w) R7 r" s  x) q1 x
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 j+ n( P' y# L) ?7 n" Q13........./ B. _' b- _9 O3 ]( G

& V8 t6 s5 Y1 l# n0 J[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:# o8 j1 _6 \6 x, y7 I/ m

) Y1 W5 x' G2 _9 A0 X! _0 F% x我以前畫左個chart去答,, ^* D6 Y& K3 x
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:
" p: X! N: h) E. K, H, _" w唔識隱藏...已經諗到..

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sor !!!....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- N. G% G2 _( l8 [: L) @
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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:% \& {" ?- k8 \2 d
相信e條題目都有吾少人玩...

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1 e! j6 H, |+ L! ^3 d! u! ~PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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. b# s  v1 }6 W! CThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:9 K6 S2 @$ q0 }9 V# D; X$ X4 f! ?

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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/ ~# ^$ A: v. z% w) [1 z- @Thanks

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: @- y8 p0 ^, S. E0 F" I不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.- d  c6 I6 B; B! y4 T
1-6 vs 7-12' F! D/ W" K3 G0 I3 {
if 1-6 = 7-12     13 is fake
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+ A6 [# d. u) E8 o2 y2 Nif not
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Weight the 2 time & y1 ?5 c$ u& `+ P
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Suppose 1-6> 7-12/ M6 i$ G! r+ M. b9 O" N
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1-3 vs 4-6 % z. h+ u0 Z) a/ B

& b6 ]2 n% X0 aThen Weight the Third
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. W4 c8 J& ?0 o- P7 m4 y4 qSuppose 4-6 > 1-3/ H" @* ~( W* `$ e
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Just like the first Step
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5 {# G2 x% K/ |- ]4 vs 5 . N7 T  f0 j, G) S5 G" }

  y. v1 i7 s& i7 R; bif 4=5 6 is the fake one
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  k2 E$ f* v, B# V+ r0 `  sif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
& H" p6 H1 ^; h- z+ C' a( dGroup B: 5,6,7,8
- P+ P1 G9 Q6 YGroup C: 9,10,11,12
& o+ s! p4 [! dGroup D: 13
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Round 1- F: G7 {. z- d1 U
Group A vs Group B, O; [9 B3 I. L: n
如A and B一樣, 即較輕一粒在Group C or D# o0 A; G4 g: u- p3 b. ?" W
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Round 2% O! _5 W( F  |" _
再在Group C拆成:
7 o& E, ^# |: Y( f( @. W. iGroup Ca: 9,10
/ T* g8 s+ I+ D! S) q9 eGroup Cb: 11,12
3 \3 F* e, X: X8 f- t/ D7 `# c然後再秤, 如一樣, 即13為較輕一粒., b- D0 q9 t% z2 ]
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如不同, 即較輕一組有一粒較輕波子在其中,
. I# N( o* {3 ^( f要再秤, Round 3, 之後便知答案.* S, Q- W+ G/ I  i9 q# \  d

8 A/ g+ e/ u% f4 je.g. #1 假設10為較輕的一粒
: z! Z+ I( _: P2 h) c/ ]Round 1
7 Y. _% z. T2 |$ H. x1,2,3,4 vs 5,6,7,8 = equal
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1 Q8 A" ^5 C# w4 K; gRound 2( H' C' Z- i1 e/ ?
9,10 vs 11,12 = 9,10 < 11,12( C% @8 _* Z6 a
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Round 3
0 }7 i% I/ ~! u% L+ \1 G' P- H9 vs 10 = 9 > 106 C/ F( R& Y# t+ ^, D

, L1 F  H. r; [" Y" j. SThe answer is 10.# _, p& `1 s9 I9 e6 H

) k$ I3 a/ R5 K7 {# v0 Je.g. #2 假設7為較輕的一粒
. {6 u  Y$ P+ R6 R/ _" `Round 1
7 F2 d! h4 Y5 X1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; \& C; v' h/ @! a" o
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Round 2
- F4 R6 R# u, _7 g$ \& x4 R5,6 vs 7,8 = 5,6 > 7,8
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8 H5 J- E4 e6 S/ LRound 3
, A8 Z: @' p1 O, {$ z8 h& ^7 vs 8 = 7 < 8
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7 _" D4 j  @) qThe answer is 7.( A, v0 y) _8 D" L5 I$ J" P
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e.g. #3 假設13為較輕的一粒* a4 o: ?* d; G- j8 `& P" g0 w
Round 1
7 b- N2 |9 \- z# q  t1,2,3,4 vs 5,6,7,8 = equal
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Round 2
+ ]( N5 Q, ?- K, ?* ?3 \9,10 vs 11,12 = equal
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! s) k% p/ S! p- Y1 fNo Round 3, j8 {8 X* x4 {5 O
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The answer is 13.
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, `) r6 i1 `8 o# o! k9 ^唔知我答得正唔正確呢?!
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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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3 P3 O/ x$ H/ U, ?5 k1-6 vs 7-12$ |7 p" p3 D4 g) l
if 1-6 = 7-12     13 is fake
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: u3 j7 Q2 L, X" {. U/ oif not
: }# P' `* \$ f5 R; q, @; k3 y0 j' o) l& p% e" r+ m0 d. Y
Weight the 2 time 0 t5 _! v2 r2 @5 x3 U0 L
, t5 [1 ]" j9 Y6 X- E" l
Suppose 1-6> 7-12
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1 J% U& ]7 q: P8 o9 ~1 Q, L1-3 vs 4-6
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- F/ n# W- @' e' `: pThen Weight the Third
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Suppose 4-6 > 1-3: o( H5 ?7 w( |& Z+ c( ~! F3 p

! e# L" t6 L$ @  X1 O! |5 oJust like the first Step
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4 vs 5 0 j! Z; c4 i9 F% g4 [* U
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if 4=5 6 is the fake one   i' U# e0 p  u: w0 T

) p9 ~! z. ?1 X4 H( cif 4>5  4 is the fake one : V9 f6 h  i' M' Q+ y6 ~; J
and so on......................

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, F7 l4 i# {( c4 Z. ~問題第二步$ ^; f; Z: ~" D' c5 f

# `/ z) @2 F$ g% Y9 ~" Q/ IWeight 1:  1-6> 7-12+ U6 m7 m9 e; s- ]" _0 B0 s1 ]

1 J% [- s: H9 h) Q4 ~; `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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! g7 D: F( G  }' L& u問題第三步. _3 v  D. B$ z! K# S  _

0 _& `% W8 [) l5 {Weight 1:  1-6> 7-12
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$ G* A6 C; A% |3 j) uWeight 2:  4-6 > 1-3 ) [3 ]7 S) Y- F* h& @6 F+ P

1 Z, w$ i$ {7 c+ b4 C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