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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% \( o6 e; S3 V. C  w『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)。$ l1 N  T. }2 W5 o
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？』' u! I2 `. F# ~# m$ {( o+ f9 v

* R2 v8 d# q) q$ V% Z! y注意:
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, `  Y& F: x$ i1 p1. 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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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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* z5 _% a0 N% ], I% W[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 b7 C* m+ Z. ?6 J) B, C, P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,3 k6 K3 p$ j# G4 `: }; ~
等我搵下仲在吾在
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7 a- V. R( x2 o6 q) `0 X當日用左37分鐘答１２粒波子，差７分鐘才合格。
7 I  t' p6 m8 Y: H5 u13.........- p) Q2 g  Z9 q4 E2 I5 ~& S2 r
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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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6 @, X, Z/ H/ h" |  m5 I我以前畫左個chart去答,
+ D. m+ C- k% \( q1 R4 s. \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 d8 ^4 U) h1 _$ J6 j4 W唔識隱藏...已經諗到..

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# t7 J/ W; z* F. e  Y) |& q8 k( W) |sor !!!....e加改左3 V5 v7 ^# z' m0 t) g
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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. z, c1 @* X5 H) k
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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:* a9 l/ Y( ~- f. ]( p
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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+ ~! Q' U  t; VThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' w( B8 d9 j( ]% Y$ b) X
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.( M0 b% M, w: }$ a2 y
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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
7 w' G% N7 G, k+ x. Dif 1-6 = 7-12     13 is fake
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9 N; n, o0 u! G& Q) f' M/ S8 [  N8 WWeight the 2 time
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; p8 I7 m- Q0 ?1 F* {" u2 A6 VSuppose 1-6> 7-12
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  Z9 [) T* T; o, D1 I1-3 vs 4-6 % F6 g2 Q$ h/ a0 _! ^) n7 ^
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Then Weight the Third  u1 L$ M. O8 T4 l& r
3.
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Suppose 4-6 > 1-3
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, e: x, I( ~! V; X' b0 KJust like the first Step/ S5 t! P, G5 b5 Y8 f2 R( x- X$ n

' m. b4 f7 t2 p7 f" h9 p4 vs 5
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" ]! c( r; K8 n1 @! ]if 4=5 6 is the fake one ; m' B' c- u0 |+ Y
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if 4>5  4 is the fake one , Z" S' P9 {. u4 a
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and so on......................

hello1997

分3組4隻波子秤3 U% L$ q/ ?, E/ t% [
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Group A: 1,2,3,4( f0 A$ D, Y8 I& d. ~
Group B: 5,6,7,8# R5 q, }) X& S' ]/ C  ^) w8 a
Group C: 9,10,11,126 n. ~0 M& }! S  B2 k1 s9 m0 G
Group D: 13
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  Y$ m/ \; N8 j& u0 SRound 1
) |6 J0 U9 R- b; L+ wGroup A vs Group B
4 N6 `& h# k0 B# c; l8 [- a如A and B一樣, 即較輕一粒在Group C or D
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Round 2$ ~  f7 d4 {6 E( |/ X% ^) U
再在Group C拆成:
; Z! S: R( }# H' j) K6 F4 ~" U, N3 sGroup Ca: 9,10; N1 D! Z2 L4 B" s
Group Cb: 11,126 u4 e0 u1 `# ~$ K( o
然後再秤, 如一樣, 即13為較輕一粒.$ V( {+ a. ]  k& o" q1 a' p

4 l$ r& ?2 W1 _- ~9 p如不同, 即較輕一組有一粒較輕波子在其中, 1 M/ }0 c8 o7 k+ @' u
要再秤, Round 3, 之後便知答案., L5 @7 z# I7 g- S
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e.g. #1 假設10為較輕的一粒) ?* S& H; B  v$ ?7 @
Round 1$ [4 }: c) `/ ^" _% B
1,2,3,4 vs 5,6,7,8 = equal6 T& n; A% r, q! E5 T

$ I5 O+ w0 Y6 `8 ARound 2
& e% q* A# K) g  l  p+ ^2 b) D  V9,10 vs 11,12 = 9,10 < 11,12
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+ M( v6 x& B, m) _4 s4 `5 @3 i  NRound 3
1 r  `& ~! b5 q9 vs 10 = 9 > 10/ p- B/ k3 r' k8 x
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The answer is 10.
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. a1 ~5 q) K, Q8 @+ a% z+ ]e.g. #2 假設7為較輕的一粒
' D7 r' ]. O0 h  k% G( d! I$ x2 wRound 1+ ~! t; u0 G$ B( G1 K
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2( c+ A3 S0 C% d/ v9 v& _
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
* x) c; x$ X* o2 z1 o7 vs 8 = 7 < 87 `( F: ?9 e7 J( r* \" C, Y1 I
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
" `8 ?, C4 f7 B0 G& K$ rRound 1% V0 e# l( k; v( W: a0 l% T. q& R
1,2,3,4 vs 5,6,7,8 = equal4 u7 l7 H$ c; m! I5 @: y7 m# }1 i

; U/ }7 y' R" Y9 U. C8 ~" ~Round 28 `3 m# [) f) d  H
9,10 vs 11,12 = equal/ S; v3 u- T2 N$ n7 ]
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No Round 3
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The answer is 13./ J7 {1 }. Y. q

3 m9 @% A; E4 N; M- U+ j* \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:4 {) U0 }- P$ u; H1 ?* Q
1.
: t6 r3 L/ z2 Z1-6 vs 7-12+ u' [  P+ s0 _/ x( i
if 1-6 = 7-12     13 is fake* C$ R; n; O% u9 D* z; o

( v1 \4 {1 Z/ M# s! oif not
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# e) e" U' S8 u: g1 m! r' jWeight the 2 time
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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 Third
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$ p  [+ l5 z5 B0 g0 k' @Suppose 4-6 > 1-3
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' C) c( [- s7 gJust like the first Step3 s3 d  V" j+ w4 H- X- x3 b
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4 vs 5 5 i% J; A+ u& b2 i" K! D& p
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if 4=5 6 is the fake one
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' B- p* w& c8 `' a3 }4 P- R, l9 ^4 Iif 4>5  4 is the fake one / P( k! ^4 f+ q! z
and so on......................

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6 \7 b6 }8 d, D" y) b1 v2 F4 ]問題第二步6 P5 M) y* w0 j' Z% X& ^

% H. l8 H' N+ A, JWeight 1:  1-6> 7-127 h% C. k) K+ x1 q* d

$ I6 C% W, J, p( v# q7 ~" \Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6; t# F4 T- d: j2 W3 u. L

+ q+ Q! B" ]) J6 L  f+ \你第三步点去搵 7-12 边一粒???% X( k. P5 T; N* t
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問題第三步0 {- v) r7 f* n' G8 |8 d+ f& p

- r) J# E9 f  oWeight 1:  1-6> 7-12
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" O  K: M7 e- X# Z4 S( }) X& ~! G: YWeight 2:  4-6 > 1-3 4 `* Q4 O1 K0 Q' a

% s2 Q3 l. o' V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