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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0 N5 T/ d4 g# c# U『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)。. Y0 ]4 ?( H2 e6 }$ L( n  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？』
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+ E# C% u, v0 u* Q# _注意: 1 E6 d" N* ~% `  k( ?
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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3 o8 @( R. _. P" b; O3 e6 k

$ w( {3 j% z2 o2. 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% Z( M4 R& D/ h
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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:& e; E7 y7 b. p1 w" R4 y/ [
相信e條題目都有吾少人玩...

1 O$ _( h5 l  T0 J我以前畫左個chart去答,
! D0 r- i9 z: F( e等我搵下仲在吾在; T0 q) J' v' t' {1 w+ \
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 [$ D' s2 h, F- S) `* q13.........2 o) X3 h! L+ R* ]; ^" A9 x
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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:4 l  v& \( Z' W0 t! u3 X

) J$ v  y3 z. L* ^  @: y我以前畫左個chart去答,. N, t4 r" |( g) M8 a( j1 M! v* a
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:/ V# B3 t5 \8 j  t! s5 a
唔識隱藏...已經諗到..

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3 E9 y5 i: |; N! esor !!!....e加改左0 x- ~7 ~/ ?% {2 r

' I2 j6 U: R- r; W7 H2. 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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# d0 E+ H1 Z8 z- V8 p: o$ Z# w[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
* @5 r0 s6 R$ z1 C2 r  v8 K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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. s/ M, ^, p; S; j5 IThanks

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.$ N' V" Y4 F, l7 \7 |9 X
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Thanks

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: c1 R$ ?+ R4 h& V  x8 v: l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# j. {; ?2 o3 U
if 1-6 = 7-12     13 is fake
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+ L8 |5 c! J( P  d  z) j4 t; fif not 8 L  d5 k; I7 W

* E4 k: K2 z# T1 d9 l* jWeight the 2 time
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Suppose 1-6> 7-121 O. {, Z6 S7 h# q8 [+ `

  v3 T3 c5 ~# a- z5 q* `) ~! Q1-3 vs 4-6
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Then Weight the Third! j+ o+ G" e0 O. a5 Y
3.
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. x" g/ r) [1 v: SSuppose 4-6 > 1-3
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Just like the first Step
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if 4=5 6 is the fake one : D: _* J) _& A6 x" O; _2 M

; q$ v! J3 d  d: Hif 4>5  4 is the fake one . v) G" x+ Y, C
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and so on......................

hello1997

分3組4隻波子秤7 d" t8 K* G3 A3 x9 q5 W
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Group A: 1,2,3,4
  @( {+ K) J% g: y% d' sGroup B: 5,6,7,8- N+ Q) {& ~( |) S
Group C: 9,10,11,129 Y/ ]8 h8 f0 J% o, U
Group D: 13- P1 ]- h6 {; ]; \

  `, x3 O3 Q  rRound 1
% x6 {7 J- y# E2 bGroup A vs Group B
" ~, L% P6 B  r# I2 S如A and B一樣, 即較輕一粒在Group C or D
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! l  l2 u9 F2 j" iRound 2
) L3 s5 B2 q8 a& C再在Group C拆成:
+ J+ x( O! m! @& {" m5 O- p* T+ F+ KGroup Ca: 9,10
2 ?2 }! F/ e& W( _: W: ?; yGroup Cb: 11,12+ \2 ^; l) w+ T3 x* J! G$ I! r
然後再秤, 如一樣, 即13為較輕一粒.+ b& M, a+ k' K
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如不同, 即較輕一組有一粒較輕波子在其中, ' ^& O$ [5 Z' y
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 }  v9 k9 ?) `7 t; KRound 15 [5 y! P; W9 {$ o. u# q
1,2,3,4 vs 5,6,7,8 = equal8 b: h/ ?3 k, ]; W" l2 X6 R# @6 v6 e$ }
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Round 2
/ F1 @7 U! y" ^6 r$ [9,10 vs 11,12 = 9,10 < 11,124 @4 l+ O/ b2 I9 o" x1 [
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Round 3# K, t" {6 x; O
9 vs 10 = 9 > 10
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The answer is 10.* g; i* Z2 {, Z' b

; V4 k! @7 w8 _e.g. #2 假設7為較輕的一粒+ C& s% X2 w7 g4 G! @
Round 1
7 w9 l& m( [7 }7 L0 L5 t1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,89 V- l( p! S9 b" E9 r

5 L0 y0 O$ P, U9 W8 e" c* @Round 2
! Y. D( i$ v$ [: {/ H- `7 V5,6 vs 7,8 = 5,6 > 7,8
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* j$ H* O7 K$ R# D/ [Round 36 P3 b) W* D, t- F
7 vs 8 = 7 < 80 E" `. E* m/ b2 U

6 w1 a9 [1 t* y% |The answer is 7.
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, C* g7 V9 U$ D. _% ?+ c2 G3 k4 `e.g. #3 假設13為較輕的一粒+ N& y* u, l8 k0 V5 n$ c
Round 1
# o  C. b! t6 R2 q5 J1,2,3,4 vs 5,6,7,8 = equal4 j" k' S, ~8 T0 T& Q$ Z9 v/ h) x- n
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Round 2
* i; T1 Z% `8 G! i) S9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.$ k7 V& X- [2 |2 b0 O$ P

! `* ?- F* U+ I4 }, I( p. p) g9 R唔知我答得正唔正確呢?! 3 z6 ~2 H" N/ }! w
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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 r7 j+ N  T6 h( M" p: e/ Q1-6 vs 7-12
) w0 E$ C. c) f0 d$ Wif 1-6 = 7-12     13 is fake2 k1 o. X- M! Q: V
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if not
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Weight the 2 time 6 W( w! a7 a4 B9 Q& j5 a
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third0 r) ^  B; w* I1 @
3.
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' V8 n- @3 Y0 w# Q4 cSuppose 4-6 > 1-3
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0 [( z! h1 ]' m4 O* ~3 cJust like the first Step
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, p8 v* i) ~" k3 P: ~# k3 m4 vs 5
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6 Z1 O, W4 i. Mif 4=5 6 is the fake one , h& \& ^' p4 b) D% A8 E* k3 y1 Q

8 B' J% R+ W% H0 R  @% j  aif 4>5  4 is the fake one : ~5 a* H5 e& R6 ~
and so on......................

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" ^7 U* b! N, D, t5 r問題第二步
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4 b( W/ C6 ]) B8 d$ M6 i6 w) M: \- MWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; A$ M; ?" _# O' @5 f" L

$ \/ J- o, X) |0 @# m- C. s你第三步点去搵 7-12 边一粒???
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- J" w; W3 x+ J& P問題第三步
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Weight 1:  1-6> 7-12" ~+ t5 u# O( v1 P* Z0 w

. g# H0 b5 y5 b! CWeight 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