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6 w2 g% U7 \) ^# |. n5 R3 t

! s- ~! d. R& V' I7 t% |$ ~『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)。
) }* H" z9 f  ]+ I. Q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: 7 Q! V) V0 m4 ]4 Y5 U4 ]/ k  ^* }

) x( c- |2 {" Z4 U; ?7 R6 e( M7 K1. 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. q" o* S4 k3 Z. T
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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+ A9 w7 s+ b. s
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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:
$ B2 `; @+ k" o( P9 k8 ]相信e條題目都有吾少人玩...

4 w# e, b$ H7 H2 ?$ d/ F& Q我以前畫左個chart去答,' q, d- ^% {) {
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。! W7 W9 U4 ^, \/ X; }' }) ^
13.........# `/ F! C# b4 @/ H
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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:! x9 S& R! Y, N

) C3 c: m* }. g7 y, W; N* h我以前畫左個chart去答,
: j& W" ^0 h( [$ ^: f7 K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:
) c+ g4 o4 X9 b  L) d唔識隱藏...已經諗到..

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sor !!!....e加改左* W7 \5 M7 L2 L3 ?6 r1 k2 b3 K
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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1 E; x+ E! @) Y
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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:
9 h( _* a5 |0 y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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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' Y; \" V; J% L' q2 i# r  J5 k  t  rPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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  I5 [+ X# z6 z; [3 j% C: HThanks

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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.
; y: x& X) ]  m+ X6 l7 b- f1-6 vs 7-12/ p. o6 d9 G$ a0 Y. Z
if 1-6 = 7-12     13 is fake- d2 l; Y, p" G. L7 O) Q9 c1 O( F

1 ~( d" |7 s+ iif not
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, `  f5 A7 h6 |Weight the 2 time ( u$ l3 Q1 a( s$ q
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Suppose 1-6> 7-12* X' i" I9 ]3 p" h) X" O6 L  Z
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1-3 vs 4-6
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/ S2 ?9 j$ j. ^! j8 a" GThen Weight the Third" L0 e3 f. R: d- I9 h/ r
3.7 g4 I  X# \2 l+ ~3 ]8 T1 |

# r9 s  L* P! ^Suppose 4-6 > 1-3  [8 J) f, M) p- ]# o: g7 X! h9 }

9 c! A; u( S, _/ W: x9 pJust like the first Step
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% C9 U! }( g8 V4 n- G, o; W4 vs 5
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if 4=5 6 is the fake one
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) g+ V  T7 G) e5 `7 @6 }7 s: Sif 4>5  4 is the fake one
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9 M# A- ^; y7 G' g, dand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
4 u; d7 Z1 i! ?! y# qGroup B: 5,6,7,83 H* U5 y) l% Z5 m+ h, E- i$ D
Group C: 9,10,11,12
3 o  R0 X) a8 x7 W8 `  uGroup D: 133 o) }, s$ i; g2 a7 n9 T! a
3 [" D) h$ O! M8 C
Round 1
& x3 s; ]8 L- d9 W& {8 K' AGroup A vs Group B
: a( _7 h0 b7 Y0 m% W% Q如A and B一樣, 即較輕一粒在Group C or D
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* A7 f) L! _5 P2 }6 v" c+ A9 tRound 2
; [) O4 S4 ?; T2 Z* N$ P! Z* u  F再在Group C拆成:
' M; e5 ?3 {1 {/ v9 |Group Ca: 9,10
( J5 V4 e- K$ w6 I/ v! TGroup Cb: 11,12! k) T& D: q1 u* H% q; {: ]; m
然後再秤, 如一樣, 即13為較輕一粒.
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8 t6 C, l" V) C% w5 i如不同, 即較輕一組有一粒較輕波子在其中, 8 r* y; v4 ~& a
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: J$ @# h; V: ]( T' h
Round 19 R+ s! o4 u. N- o/ r2 K; T6 \
1,2,3,4 vs 5,6,7,8 = equal* N1 ~& P  _5 d; l
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Round 22 ?5 o0 D: o" ~1 u. @3 |0 D
9,10 vs 11,12 = 9,10 < 11,12; Z7 f$ E8 U! _* D0 y6 h. Q; ?

; M9 q; F- g) G, R" KRound 3
: K% O7 |  F8 [) m7 a3 @9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒, S' Z" a, c' E
Round 1
+ Z6 X1 r/ y0 E8 I! A- G1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5 M+ J( j9 M. q" s7 T: nRound 22 e# [  E) Z( Q4 K
5,6 vs 7,8 = 5,6 > 7,8
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1 M; Z: Y& n& B) p. k/ tRound 3) M/ s0 O/ B: R7 m, ]3 A+ D- r
7 vs 8 = 7 < 8! D1 O* k" ]. P, r3 ^. g) E
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The answer is 7.
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e.g. #3 假設13為較輕的一粒1 l+ B$ S4 ~% ^. y3 G
Round 19 T2 f0 Y5 B2 p+ X
1,2,3,4 vs 5,6,7,8 = equal
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4 }' i- ^9 ?  y; ?; c) ~Round 2$ Y2 B: _- z1 O
9,10 vs 11,12 = equal
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No Round 3% j; \$ K1 I" Z3 b7 P, F  R

% Z- A/ e' T1 N: E) n5 R% SThe answer is 13.' l2 R- Y9 ]' E* {3 |5 A7 S
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唔知我答得正唔正確呢?!
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4 `0 B1 z' }: 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:& @* h- X/ t/ Q! H* h6 W6 V8 f
1.
( o. F8 K+ q( S. v9 I# J$ Y1-6 vs 7-12
* Z$ n: }0 d  G8 i3 \  @if 1-6 = 7-12     13 is fake* x3 K% q: Z1 ?5 t  e. M" ^2 Y2 h

: a) |% M1 w- G/ ]' \$ S$ Tif not , h. q0 w1 \4 D( e, b5 ?

: X8 |* z9 Z/ |/ ]. H* bWeight the 2 time * f' t( p% z  y$ k# n

8 ]; W/ z1 b6 M6 ^* ?7 q* B3 oSuppose 1-6> 7-12
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1-3 vs 4-6
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* ?8 n7 X+ {, N( c. \5 D; x( |Then Weight the Third
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Suppose 4-6 > 1-3! b+ ]  l& C  P/ L& T/ g, C  ^8 w

( h% f3 t$ d% ?$ n! f5 ~# pJust like the first Step- B0 a# p# V1 C- p

& Z6 O: ~- X+ p% n4 vs 5
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  V5 Y: \5 B" d6 Y' G2 O& d9 l/ Mif 4=5 6 is the fake one % }! s+ a8 v& d- G) E& @

% h6 M6 I' _% [4 Y) \9 O& n/ iif 4>5  4 is the fake one ( k3 B) e4 b1 P# J
and so on......................

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/ h0 T( p5 Y( V# Y1 }9 d問題第二步# v- t/ T% j& ^6 n5 X" v" s

: l+ i- v1 B1 w# @( sWeight 1:  1-6> 7-12. o3 A, `, K, {4 `" t6 [' y1 ~

2 C. t+ |% W0 q7 {, S/ ]) j) dWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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- I2 @7 b; m( u7 L你第三步点去搵 7-12 边一粒???  _( C; ?" s  z2 ]& `0 j
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問題第三步
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$ E; z: x, `% AWeight 1:  1-6> 7-12
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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