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+ g9 ^$ j; o) X# _' o) {

2 A) d4 b) H4 H1 t5 [( W# 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)。4 K. L1 X1 Y" j( j, @5 t! w# e
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？』( h7 h2 O1 _' a0 U1 v3 ?

) V$ ^  i/ ^# l+ a注意: + p. l: E5 `) X" i5 H% ?

4 y6 c. h6 b1 z+ ~3 f1. 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$ U. [& m& y8 W3 ^, X% x
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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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: I" ?8 k& p) H* J! ?+ _[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
* c0 K, H8 O0 p' _' j4 a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,
# D# L# u5 g; m等我搵下仲在吾在2 z/ T1 G% v" A) k' ]
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
* a4 t0 \0 B! E2 D13.........; P9 v% i' Y0 _* L  c
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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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- P2 E" ^0 f. R! ]8 l: J$ d我以前畫左個chart去答,9 C" l: c+ _4 V0 Y
等我搵下...

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& n- X8 J  T" K  V. t/ q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:
4 @; M( ]. A7 G唔識隱藏...已經諗到..

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$ E- z, W5 s6 C8 d/ T( ]+ l' n# M  Nsor !!!....e加改左8 u2 M* |7 d( N9 Z3 M/ ^5 ~

: o8 r& i1 H7 u9 p- {3 N2. 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7 D/ n0 |( V/ d7 \3 B2 {
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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:
8 H5 {& U$ q0 D* ?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.( e2 k. r1 ?7 n, i4 e

8 F& t  w: J, J2 l' FThanks

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.
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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

1.
; v$ i3 ]- h# d: t1-6 vs 7-120 ?3 L4 Y4 @, F3 }
if 1-6 = 7-12     13 is fake
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% V7 n; G! f$ s  @/ o% o! SWeight the 2 time ( Z- x! A- j% e7 \! X- t
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Suppose 1-6> 7-12- x: Q6 X8 k' r6 f. T- _

/ h2 w9 [% g% ?/ U% S  p1-3 vs 4-6
  J. v; {* ~. `6 _8 |4 z5 E) W/ B' |0 j8 A4 e& G8 T4 a& v; F
Then Weight the Third4 ~, n% A1 I4 A+ a; s% i, P
3.
8 e. \2 r- f+ S4 X- t. L; u+ I9 F5 K5 `  @+ F/ P  U9 z; |
Suppose 4-6 > 1-3
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  _* C/ O4 @+ f; U$ d7 \Just like the first Step: f8 e2 I2 k& B8 p' [3 E) }

. l9 O$ r3 D: T2 q! ~+ ^4 vs 5
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if 4=5 6 is the fake one ( Z9 B  w$ z4 \  p9 \1 z

- Z; d9 V$ T. n; X* q, _7 Oif 4>5  4 is the fake one 8 P3 |2 d7 c6 w) {, O6 J& k& E
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and so on......................

hello1997

分3組4隻波子秤
4 }( ?. ?: j% e5 x- c
! i, ]  e  X7 b, q2 tGroup A: 1,2,3,40 C" d+ j9 T- t
Group B: 5,6,7,8
% z8 p! j3 ?+ y4 t2 pGroup C: 9,10,11,12( }6 q1 N* {+ t7 ^5 @) h" ~
Group D: 13
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Round 1
' r0 I: A% R  y/ l0 T7 p& T  \Group A vs Group B
# E: m: q. I- ~# H2 l5 u! X如A and B一樣, 即較輕一粒在Group C or D$ k$ m+ c3 e' y; G, u+ p: b0 F7 W: w
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Round 2+ g. J/ B" o4 [  G/ P
再在Group C拆成:; g8 z# I& ?, G9 _9 K
Group Ca: 9,10! i1 {' W" ]8 g' y& n) P% T
Group Cb: 11,12( ?: |+ j" V6 u5 f9 h5 @
然後再秤, 如一樣, 即13為較輕一粒.
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' U! A, [7 e6 t' Y3 V% [, T/ X, j' c如不同, 即較輕一組有一粒較輕波子在其中, ( [) r* u8 B* a: G9 A
要再秤, Round 3, 之後便知答案., R. A# l" ~/ p

2 ^# }' t) ]$ i6 M* A/ |e.g. #1 假設10為較輕的一粒. {# k3 r3 {9 L/ g! P- d
Round 17 Z. j* z( V! w1 z' l
1,2,3,4 vs 5,6,7,8 = equal6 Z$ P5 p) `* q' d& l

; y# G( f6 |7 U1 ORound 23 `" v+ B% X2 {9 [: s" v6 o. g$ \
9,10 vs 11,12 = 9,10 < 11,123 P" U( F5 x4 ^
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Round 33 J  I4 Z& T/ j
9 vs 10 = 9 > 10
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The answer is 10.
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' }# w3 N5 f' V6 E( d+ Q/ s0 Ie.g. #2 假設7為較輕的一粒* B" Z$ s+ K6 d6 M( U# `" h
Round 1
, V2 f9 Q# ?2 Q4 O( @9 f  w1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
- B7 l( S' I# `- a# Y; d5,6 vs 7,8 = 5,6 > 7,8
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: O9 |5 z0 ~0 y; a" V" KRound 3; N+ U$ s) n( w9 S& B
7 vs 8 = 7 < 8% c# }. C/ \5 L
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The answer is 7.) p* p3 A! [8 D) N

6 N7 b0 g9 R4 E1 V$ \1 T  ve.g. #3 假設13為較輕的一粒/ H* R3 X3 [5 r8 L8 ^5 Y
Round 1
' i; V) c& [8 N$ G. Z# Q/ t1,2,3,4 vs 5,6,7,8 = equal
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- s8 [0 m9 T3 `7 ^0 D& I$ l1 _Round 2
. n) \* w- ~$ F7 g: {9,10 vs 11,12 = equal
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% q# m# x" U) |7 H6 _No Round 3
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  A: A( B0 M* A0 K: a6 oThe answer is 13.1 e) B' y( Q1 g1 ]- x

. y! ?7 @( X) F' f" ~唔知我答得正唔正確呢?! : k! w. g1 b/ {

2 Y5 Y; i0 Z5 I# W( i. K) a[ 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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( f" m( _1 ^( |' j" m: K- h1-6 vs 7-12
4 D" U  Y+ o2 J( A1 mif 1-6 = 7-12     13 is fake$ A3 _" o4 {+ _

' P4 f% \% F4 Y7 a  b$ _if not * O5 J% c5 K8 U0 j
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Weight the 2 time 3 u0 K; l! H8 L

8 V8 |! s9 K/ \, `. RSuppose 1-6> 7-12
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, s: }, ~- m8 W5 i% f' D1-3 vs 4-6
2 [/ U+ I. m4 f
2 l: e  r* S5 B* ]. z2 a  CThen Weight the Third) y6 w  ^1 @: c% X( C. Y
3.5 V4 V; P( K6 s- `8 ?
6 s$ G5 J4 r" m% e6 D6 E
Suppose 4-6 > 1-3' G1 T- |+ ]( ?( G" L

0 ?* a7 {6 v5 K: DJust like the first Step
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+ }- ~7 _  i  W$ B& Z4 vs 5 8 G! D' g5 u! W. b
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if 4=5 6 is the fake one
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" h: \  A3 D9 ~$ gif 4>5  4 is the fake one
2 L* ~  }9 u, {9 e( [0 B) O' s, cand so on......................

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5 _9 Y0 y% Y+ f5 V1 u# ?問題第二步/ k# i* Q. v" s: l( Z8 j
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6: d2 }1 L! @  L4 p0 x
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你第三步点去搵 7-12 边一粒???( a' N# t. I( [8 ?' F

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" N: P5 m& }0 G8 Y) t問題第三步+ S+ y3 N9 v, Q1 k  g2 Y: I2 N; m

* q4 I& v6 R  @2 YWeight 1:  1-6> 7-12
  q8 \4 K; ]" C  n! _
$ _5 G$ K( w9 I. F, sWeight 2:  4-6 > 1-3 $ `& P  q7 t; x
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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