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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1 e* A' L) R# `8 h* [. r5 q『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)。  P0 E# h1 Z6 e, {4 P; n9 ^4 ^
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？』3 q, j* r6 w( `1 c4 f6 ^
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注意: 6 k- B5 s0 B( j* A) ]( d

" K" T" ]$ M& `: A' v1. 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. J, N5 z! ?- N) m4 r
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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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; b# [0 [0 Z! O1 ?% P[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
$ [4 m# r5 {! E) Y相信e條題目都有吾少人玩...

! l6 V( F! Y2 S- R我以前畫左個chart去答,
6 }; u& B- Q4 r& S5 w8 r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。2 H; e( J5 f4 ~3 [- [2 A
13.........! M) `" V0 F7 j+ S/ h0 u
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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 M0 L$ F) ^) I, c7 [
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我以前畫左個chart去答,
5 A. o% n. G$ y. s1 i9 ?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:- ?7 U, a0 H0 s6 ?) V9 R
唔識隱藏...已經諗到..

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3 V3 P' o' F# X5 g8 Asor !!!....e加改左
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# J0 ^7 j# w1 D. p5 r% V% k7 J2. 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9 Z6 Q7 S* \- O3 N; |* 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:
# I, D2 F1 z4 X9 Z/ W, y- Q& 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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% k& v' l4 u* f- {4 D
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$ V" |  h3 o/ c5 M! S2 ?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

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1-6 vs 7-122 s$ }3 |2 x9 [, l
if 1-6 = 7-12     13 is fake# S+ P  i& h8 t3 b

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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 : B+ L/ c' N/ p
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Then Weight the Third) S" a, J& _6 a; Z: {% l' f5 r% k- Q% W
3.
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0 A9 s& H  o% m5 p5 a  KSuppose 4-6 > 1-3; m. y. U0 z* l2 W/ P

& I6 k, `$ B' FJust like the first Step" z5 s: Q, x8 d6 @
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4 vs 5 ) X) ?9 @( S) ^5 k3 A& H: F
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if 4=5 6 is the fake one
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% T+ h* d+ g& M! S$ z( n- |/ \if 4>5  4 is the fake one ' b$ {/ a% E6 k6 C  }- y+ Z: e

7 v* A) d% X  Y# a. D, |9 Z/ ?and so on......................

hello1997

分3組4隻波子秤( R- ?* j3 {& J4 @
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Group A: 1,2,3,4
3 ]; H5 s/ H1 s9 M; U- T- dGroup B: 5,6,7,8) a! S( u; C* ]7 ?
Group C: 9,10,11,12+ g$ f* K3 o% {
Group D: 13
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Round 1
0 C2 W! c0 e: Z7 Y: h6 sGroup A vs Group B
( c) s) f9 ]( }( u) v& E如A and B一樣, 即較輕一粒在Group C or D( W  L  d; C! v( Q
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Round 2# M8 C# m8 F8 H& C9 _+ G
再在Group C拆成:3 q1 o3 G7 w. Z
Group Ca: 9,10
6 p' c. k" W% a* t. fGroup Cb: 11,12
. E( y) h" d+ i1 U6 ?. s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,
5 n' c+ q  |- @9 A要再秤, Round 3, 之後便知答案.
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0 L5 u2 A- n, H3 ~, @e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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/ E% {/ a+ _: e& xRound 2
% {+ l( l9 _( Q! I: L4 v2 m9,10 vs 11,12 = 9,10 < 11,12% X6 M/ a5 r0 e5 Q( T

# R/ {0 r, F: LRound 3
( |; e9 k0 y  O4 s3 k/ j. N9 vs 10 = 9 > 10
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The answer is 10.  G4 f+ S5 \3 O, F$ [

& p7 g! {( y  o( z! re.g. #2 假設7為較輕的一粒
1 ^5 G0 ~( ?0 C$ {1 a. KRound 1
; Q3 R# L- d  I; ^- {, k( a1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, o* z- a, ^7 @. }

/ f# B) ]& u) k; oRound 2
, X1 b9 z$ ]  L9 ^5,6 vs 7,8 = 5,6 > 7,8
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Round 38 Z5 X2 o1 j. R4 r
7 vs 8 = 7 < 8
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( P3 U8 g8 f) K. sThe answer is 7.
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! H/ E3 ~# B. w1 V% te.g. #3 假設13為較輕的一粒0 A- F4 e& O+ \8 Y
Round 1
( `4 L5 y0 e# S+ Y, }2 l% S) G( C1,2,3,4 vs 5,6,7,8 = equal
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$ H4 _. C. ?2 m* RRound 2
/ _6 Y8 D% R. Y9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.4 r. A. a" U; }6 S! [& f; B

  Q: ^' d- `% H1 G# C6 L4 ~& D- g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:/ ^2 K6 K1 t1 ]3 u- I- ?5 S
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1-6 vs 7-12
0 M' X; q4 T0 y( {3 h$ `* Z' Oif 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-128 z' E. t# {) g) b& K8 D# i
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1-3 vs 4-6 1 b  n7 ?9 F- V) F
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Then Weight the Third. G7 _. `" b5 X6 w, J" n. a# [
3./ v; A* k( \: ^+ _% `# c: u

- {% C6 h; ~% @6 {) |Suppose 4-6 > 1-3
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" O2 _9 S2 L& k7 dJust like the first Step9 ?  C9 u5 ?& ^! ~7 V. Y# X4 }

6 h: p: m1 }  u' O/ r* x4 vs 5
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$ R7 x- r4 ^2 K0 ~& o8 S* X+ R1 ~if 4=5 6 is the fake one % i; v; a% I" a
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if 4>5  4 is the fake one
5 E4 R" c' k# e. N  U8 J- Tand so on......................

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問題第二步& Q7 j# v# H0 ^& C' v
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Weight 1:  1-6> 7-12- v' X9 r% C4 o+ u0 J* P7 R

/ K# `$ H+ H( ?5 Z& BWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6, n5 l/ z9 c% R
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你第三步点去搵 7-12 边一粒???
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========================================
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3 D2 p8 V) L) h) R  k6 K/ ~問題第三步3 M  n5 @/ r* r+ v, C0 Q7 g

: ]+ k1 W6 I$ r2 q' G* W; l0 O! m7 fWeight 1:  1-6> 7-12- u5 k8 O  S, p3 ^* B9 h! g

4 @5 q, K  `  x# O0 O; R$ nWeight 2:  4-6 > 1-3 ! [) \9 f, x# J
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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