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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『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)。& t0 O* @% U; P
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？』6 b- ?% D1 m* m

* n  X! T1 g2 u6 `+ \* ~注意: 9 N- t; y" @8 s- J
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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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3 z- d) ^( ^! `6 f/ ]; {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) J7 c  q- I9 L( g
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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:! N2 @! u# m6 K3 j1 @3 M
相信e條題目都有吾少人玩...

4 k8 C1 u4 w9 P: o我以前畫左個chart去答,! X+ Q3 \1 ]# j6 {2 k- _: \
等我搵下仲在吾在9 W% f2 s' R# ^- y1 P& w* u

% H6 g: m5 a! u5 m; N7 _當日用左37分鐘答１２粒波子，差７分鐘才合格。4 Z# L' R5 g3 q8 Q* X& ?$ t
13.........: H  g: d8 R: w
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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:
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& x# j- j; V$ B& P4 ^: G  [2 c- c我以前畫左個chart去答,6 G2 \- b1 Q3 v  I0 p3 I% K8 x0 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:  y- h. M+ Q" w# n
唔識隱藏...已經諗到..

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sor !!!....e加改左
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' L) q/ [7 u! V7 H9 X5 K7 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2 L0 r3 }0 A& Z3 q* I
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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:* u7 R. V7 X, h
相信e條題目都有吾少人玩...

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* D- ~, d8 a3 ]. n) rPlayPlay, Let me know later who has the right answer and I will add points accordingly.# x) y4 w: `  k4 L+ y# e8 H
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:2 Q2 u8 K5 M" ]3 H6 B% Q* r. @
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5 t' `( C  h0 Z' [5 z, R* w, yPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 W" v* C8 G7 N
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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: g7 {% J' Z: \
if 1-6 = 7-12     13 is fake
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if not 8 b9 v9 y% l8 J  c9 \1 y! b; _

) U# `' t5 S* Q/ V7 }7 ~Weight the 2 time
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Suppose 1-6> 7-12$ C1 T% U0 d* H% }
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1-3 vs 4-6 5 I& f4 y+ t' A

# [( j8 j' M8 zThen Weight the Third
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) v# K+ q( [4 C5 b  SSuppose 4-6 > 1-3
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0 |* Z" |* N# `; g; l% N8 @Just like the first Step
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4 vs 5 & _% k2 \6 L% Z! J  \8 z7 ]

3 `  B' K8 F: [3 Z- x7 g: Q5 wif 4=5 6 is the fake one ) h! a; l4 f! U. X# X
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤# o( m& r, `6 x8 e
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Group A: 1,2,3,4- w" J5 H  I. l& M' K. _' x2 ?
Group B: 5,6,7,8; |. n) Q2 u1 `1 x& u
Group C: 9,10,11,12  P& |9 I# u" L8 q0 d9 D
Group D: 13' v# d0 R2 A6 j5 S$ Y. U+ i  [
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Round 1+ |8 G! `% m; K4 i; k
Group A vs Group B3 h8 @/ V6 k& m; Y
如A and B一樣, 即較輕一粒在Group C or D
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5 `0 {0 `8 [" }7 P+ Q" ARound 2- F1 r2 }' j+ ~0 Z6 `
再在Group C拆成:
; h/ i: w' O' p( f) O1 c: y! BGroup Ca: 9,108 B* U  B  B& A2 x
Group Cb: 11,12# b, I- |% S# C% |
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, % p; M* e3 K! c) n  u& _2 N
要再秤, Round 3, 之後便知答案.
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. o; M$ V: `0 ~% O5 [$ Xe.g. #1 假設10為較輕的一粒& s& j& D/ F; u8 t; \; w
Round 1
9 O7 l. _$ b5 ]& [1,2,3,4 vs 5,6,7,8 = equal% K4 R; Z1 i7 {% G

. Y3 q, p! ~. N5 N" jRound 2( u7 G  u  Y1 ]4 L
9,10 vs 11,12 = 9,10 < 11,12
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" |5 p# i6 d; ^) Y. GRound 3
0 l* D+ V2 L) b7 U3 L9 vs 10 = 9 > 109 N9 N8 O/ W7 r: @/ o, c  p2 S
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The answer is 10.
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e.g. #2 假設7為較輕的一粒8 Z. S9 K1 C( U
Round 1
- }" p1 G' D! n9 M1 ?1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; C' t7 S0 r' e' i+ q8 |
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Round 2
8 O/ s! L( H* F5 l, Y. @2 S; B5,6 vs 7,8 = 5,6 > 7,85 X+ |0 ~" y5 }! z

; v7 X  O- x1 X. M$ {Round 3
: A% ?0 H# }" R& X3 r- H7 vs 8 = 7 < 83 ~/ S: ^- J: x2 x

1 X- w* z, b, v; t; a( ^The answer is 7.0 J) O5 A; |1 J* x3 W

4 r3 `1 u: \8 K+ \; Ue.g. #3 假設13為較輕的一粒
% M6 [, C! q& i- E. b7 B5 [; M  bRound 1
' d1 O' S/ i# }% q. l( G; J1,2,3,4 vs 5,6,7,8 = equal2 I4 i( l+ E+ g, p. K

! A1 ^, N' j+ R% k8 M' {$ XRound 2
+ G! c8 Y: \: c7 W9,10 vs 11,12 = equal
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5 o; D/ _- \9 K! F9 pNo Round 3  ~. ?, A- W& k

+ F1 J: i9 z0 `6 mThe answer is 13.
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唔知我答得正唔正確呢?! # ^+ [, E! O- B3 P& W/ g
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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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/ H; d% m' g7 y1-6 vs 7-12
0 m, x2 E- i4 _' N; p+ @' m5 L+ tif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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% M) h* y0 m, J2 b" MSuppose 1-6> 7-12
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  x3 d8 @; E9 d2 q: X% V+ B1-3 vs 4-6   x7 l/ C, y) G: \: k! W! |; k; g

  n7 k, J# t2 e8 R" GThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step& k1 g8 V0 _5 c. t; w2 i. s  n
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one : ?; k5 m/ K, ^- C8 q1 p  l: G
and so on......................

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問題第二步
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% W! @8 p" {) J( _  d4 zWeight 1:  1-6> 7-12
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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???7 s4 c6 V) X3 W4 z' c0 C
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問題第三步
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$ j5 T  I. d4 R& P( B( yWeight 1:  1-6> 7-12
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2 m( T  D/ v; @Weight 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