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)。
* f$ ^& b" z( `2 {3 Q1 P0 n4 [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？』2 P* J8 l& y8 e& ^6 V* ~3 Y$ t' ?
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注意:
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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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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; U8 b/ {( E% M4 O1 m

1 y: U8 K* S/ P* I, j# f0 }* ~2 v[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:( p0 Y( F: w1 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,5 {4 R- X% U# Z( X3 \
等我搵下仲在吾在7 V1 ^7 }" g) ~( M

6 ^9 ^) u$ o: S7 k! s當日用左37分鐘答１２粒波子，差７分鐘才合格。
& l, H: f, F8 b! n8 B7 i0 P: m- w13.........- ]& c3 u5 Y! i& F2 d. T) H* e
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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:3 x/ `' G+ m  f; ^: @

$ i" [" _$ n( x2 [; S我以前畫左個chart去答," q1 ]% {% e" I2 O, H( s0 Z4 x
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:
" p( r4 q, w, E% P$ J$ B( z唔識隱藏...已經諗到..

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sor !!!....e加改左5 L+ |% E; Y- w* R4 F) J+ l
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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
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, X6 K: M6 `# X[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:$ s- i7 J' S5 L& l: Z4 D5 Y
相信e條題目都有吾少人玩...

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* N3 `. z" Z6 Y' LPlayPlay, Let me know later who has the right answer and I will add points accordingly., X! k7 M- n0 e' s$ f

' d4 X0 C1 B5 s2 R; N) a5 H& MThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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4 j- u* f* L4 o; gPlayPlay, Let me know later who has the right answer and I will add points accordingly.  i1 g7 i- P) Z; I9 B

& W8 E  f1 I( o/ Z" CThanks

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" Z$ B1 n( @8 e( H9 ~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
8 Q+ N; f& N5 D& ~' uif 1-6 = 7-12     13 is fake
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if not 0 w( f) X8 N" o* B. `

' B9 y, S- Z; ~6 j% j! ?+ KWeight the 2 time
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: O9 a5 O  t8 `; wSuppose 1-6> 7-12
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* ]; l8 I/ N- L1 T5 w! i1-3 vs 4-6 ( m" D4 P2 J( W6 i
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Then Weight the Third" V% j6 d( o+ K6 f# D. @, @  X8 K5 W
3.
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Suppose 4-6 > 1-3- x: p0 D- K7 \

6 \' w. B) }& m- S& O" U! i! TJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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' ]* j% F& J& Y$ z! E2 |' v( Bif 4>5  4 is the fake one
& s9 p/ d' L# ~2 r0 y- a
+ q! ]1 v3 C8 v  band so on......................

hello1997

分3組4隻波子秤- U" R% C0 r# u6 C3 ]+ r; t
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Group A: 1,2,3,4
7 h1 e* q. }5 z' }Group B: 5,6,7,82 K5 B/ `5 S7 U5 j2 F1 w
Group C: 9,10,11,12
% U: E- P0 @( Z* WGroup D: 13
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Round 18 w& C% M6 ?$ S- S  N$ B
Group A vs Group B) R9 Y2 l- n3 e; G+ Q
如A and B一樣, 即較輕一粒在Group C or D9 {- R: u6 b' s* Z" I. v4 z

0 _9 x3 _1 o4 d+ n% h+ cRound 2  h6 o% i3 ^! T6 ^8 N" X/ n1 g
再在Group C拆成:
$ \+ k9 C) A& v  C: wGroup Ca: 9,10; j; D8 N4 n7 n/ R  I
Group Cb: 11,127 [! s" ?8 }( j
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, * @$ L5 d- V# ?
要再秤, Round 3, 之後便知答案.
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9 h' Z  t; L0 b7 N* W8 q2 `e.g. #1 假設10為較輕的一粒$ L" r3 ]7 |( W4 U
Round 15 |" m$ m. C/ P- h
1,2,3,4 vs 5,6,7,8 = equal
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; i3 Y" [5 e( s1 @Round 2# @+ g# c  P$ D9 j5 F  T( X0 F
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
; a0 {& u/ F4 \9 |; R( u4 B9 vs 10 = 9 > 10
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0 i5 A* V+ b2 r9 I; K# N! lThe answer is 10.% b# y% L7 y9 [" I) z4 s' J5 p8 _

& g& Q% Z' U& U- E# W( de.g. #2 假設7為較輕的一粒
1 Q8 E# B5 i( W2 YRound 1
; T, b. [8 \; n- P. V) f! J) k1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
3 E; d2 m  ~/ H( E5,6 vs 7,8 = 5,6 > 7,8; Z; J% P, C; g# W, X, [
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Round 3" p& ?) l' Q+ b" g% L4 s5 K) j
7 vs 8 = 7 < 8- ^& w8 G8 Y# |1 |+ f
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The answer is 7.9 \( f$ V$ y- A% ?% v: \/ |* H
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal5 y( M% k6 [, r# e

6 |* B) l7 K" WRound 2
) J. [; U' R, X9 C/ `" V3 D9,10 vs 11,12 = equal: {) c" |9 m, q* W; H5 E

) d4 d5 @/ v* S( X# ]( @No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?! : U9 ]4 F- P; _. J; n) D4 H
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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:* a$ j) F. T8 B: y$ A( Y
1.
+ }, i# S0 L4 l; N1-6 vs 7-12( U6 J/ W! a. _
if 1-6 = 7-12     13 is fake* N6 K& e$ |) j6 O+ I8 X% G, Z

- C' b: o! w; H( D2 B. iif not
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0 l+ o1 H7 S: kWeight the 2 time 4 \8 B! h' P" A% {/ v  b  Z
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Suppose 1-6> 7-129 w0 B& e- g. O8 N6 W' w( p, t7 w

* D3 S$ _( s; G! S: o' S( E1-3 vs 4-6
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Then Weight the Third. ?; l  g1 ?& l5 [7 \+ H* M4 C5 n
3.9 W' x3 u. y+ x# e

) I) S# c8 _: e+ LSuppose 4-6 > 1-34 |3 C+ \$ K$ n' H0 [4 f. q6 p
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Just like the first Step. X2 L& w) }6 X+ a$ S7 ~
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4 vs 5 / Z7 W* D8 a; R$ {( i

: p2 i+ K; u2 g# R7 qif 4=5 6 is the fake one
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# @2 b' B  x/ J( sif 4>5  4 is the fake one - b4 j! y: b; `! g; Y- b1 m: Y
and so on......................

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; _0 \9 G' b+ Z, l/ ^& e6 u問題第二步
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Weight 1:  1-6> 7-126 P( n3 u& ^* ]$ x2 j! G4 E

& S" J$ q# X5 t/ X, a& ~Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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6 _4 F7 s7 z1 g% w, b你第三步点去搵 7-12 边一粒???9 W1 |. t6 F" h6 S( r+ r
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問題第三步6 O) M7 p  Z- c  l
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Weight 1:  1-6> 7-128 u% K6 r" s5 U. `

$ t, s+ k" o+ w6 c* {Weight 2:  4-6 > 1-3 ' g4 o4 t; k+ W$ N" W$ ~8 C. y5 A
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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