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  E" r) Z$ V' \: g9 {

8 n% ]/ ?$ g2 y- N『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)。& w# ~, Q$ O) M
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？』8 a- C3 \3 M, k, O! I0 H
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注意: ' ?' {3 G" Q/ B) h& m% a

0 s6 U" }+ \) ~2 r) m2 I3 h1. 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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0 S) u- G" N' p5 L[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
' a& T  X3 |6 Y3 v6 P7 u% O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,' O0 c) e0 O  _( i
等我搵下仲在吾在$ K: u5 k6 @, |# }
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當日用左37分鐘答１２粒波子，差７分鐘才合格。; g0 W6 R5 u% |/ B& p
13........., r0 D0 g: \3 Z8 _4 B
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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:% w# j5 Q0 K; ~

: U/ z) f$ e9 l/ V* B. h3 i我以前畫左個chart去答,/ H* \, s1 r% q, r# o1 S2 R
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 }9 P; d+ }' n4 h; f8 t* c
唔識隱藏...已經諗到..

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$ i' m+ T5 ]- `sor !!!....e加改左
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( J' v& N- g+ P( d2. 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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7 Q. c- |: v  w1 s3 @  i. T# |/ d[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:5 M. ~, Y, A4 @6 {% I
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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* C& q; T8 M! XPlayPlay, Let me know later who has the right answer and I will add points accordingly.1 s1 n3 N/ f4 _) \- f9 O. x

8 \' ?6 o" {2 a" HThanks

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7 V4 U) T4 O6 I) F$ E4 {& ~不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
: C3 L0 E6 ?) Z  U1-6 vs 7-12. t! a( Z2 X3 i3 _) v4 H
if 1-6 = 7-12     13 is fake% T; y( @4 G5 ^8 A  L

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Weight the 2 time % q+ t& h7 T) Z6 F8 Y

7 p0 b( _. @# ^* iSuppose 1-6> 7-127 Y* y" m' S+ \4 `% Z
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1-3 vs 4-6
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! a; P7 m5 Q2 l) _Then Weight the Third
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Suppose 4-6 > 1-3& F) @5 V& g, p7 O5 o) E; g3 E
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Just like the first Step1 G# N; A( e/ [

; ?$ j. [! T4 y# t) t4 vs 5
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1 G7 e4 s8 z0 S$ q5 L' i2 Xif 4=5 6 is the fake one $ d, G; i9 w  q, V

( `( Y7 Z1 U5 @% f2 p* jif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤4 b5 }" z; u+ z7 ]3 s" |* i3 {
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Group A: 1,2,3,4
  C! Z/ A2 W& ]7 I9 Q: }Group B: 5,6,7,85 O* i6 y' m' ^
Group C: 9,10,11,12+ p. j# Q/ M" u
Group D: 13* ]2 U. C4 J7 Z, v

4 E! s$ b3 S5 x/ X* QRound 15 T! f5 V# x% F, k, r
Group A vs Group B
" V: e' `$ x, h- M9 m4 Z如A and B一樣, 即較輕一粒在Group C or D# ^; d8 A3 J6 _' s3 U
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Round 2
* \- T2 e+ G1 Y+ E( j( T$ X  A再在Group C拆成:
5 H6 c% d! `$ h) G/ {Group Ca: 9,10
9 F( d6 n" E5 X; I1 aGroup Cb: 11,12' P( \. |! ^% ~0 l- z# g2 m
然後再秤, 如一樣, 即13為較輕一粒.
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% v8 \" {* O- H% O0 M如不同, 即較輕一組有一粒較輕波子在其中,
: P: j- m" {& V5 Y要再秤, Round 3, 之後便知答案.9 m. D" ~4 h  P8 ^# }
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e.g. #1 假設10為較輕的一粒: ?8 h, X/ d: ]1 p
Round 1% n/ `5 Z# q$ u! s) v; V
1,2,3,4 vs 5,6,7,8 = equal
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6 p; |7 j5 `# g3 R+ u1 z: w3 a1 TRound 2
5 l5 F& G9 [. |9,10 vs 11,12 = 9,10 < 11,12( G/ a! [! \7 \# @

  _. k9 A, ?8 o6 i( k$ Z0 O; VRound 3
0 C; k/ E3 P# h% ?9 vs 10 = 9 > 10
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The answer is 10.8 Z, T9 Z! y: I+ n" w
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e.g. #2 假設7為較輕的一粒
9 C4 f8 j% T( C3 ^' {Round 1' f4 V: g5 @+ W6 L) l9 a1 G
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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; H8 Z! g8 n6 \) V* m9 D( HRound 2
) t- d3 A) w$ {7 j$ u5,6 vs 7,8 = 5,6 > 7,8
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6 g* d. P- ^1 L( bRound 3  p- s7 Q1 J3 ]# T
7 vs 8 = 7 < 8& x; H% a- R- e3 d3 d* y

8 x" A) C; X* T5 WThe answer is 7.
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e.g. #3 假設13為較輕的一粒7 I# q2 n1 |" B; a
Round 12 U& r6 i; V/ f4 E6 ~4 G( B$ g( t
1,2,3,4 vs 5,6,7,8 = equal
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: ^3 a/ a3 p" b7 i0 L* xRound 21 U9 H' e$ q+ l" W6 O' |' w" G
9,10 vs 11,12 = equal
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No Round 35 `8 U3 ^& W! G2 ~. m

0 ]' T7 O, K: ?& F* R* jThe answer is 13.
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/ {, j" g( b) u, z) e) f; j唔知我答得正唔正確呢?! 2 K4 n, A% a. k5 u8 h* z
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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:5 J0 g5 ~* m) a& V. M" i1 f
1.
, Y! c" @) p2 E' @# n1-6 vs 7-122 ~- s* P- Q: L( K1 a
if 1-6 = 7-12     13 is fake0 |% M# x1 ]0 g% x# j

: ^& ~! U" h8 O9 t# Yif not
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5 `& x; W# a& \  lWeight the 2 time * J* i' j) K/ n3 f9 n. j0 m
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Suppose 1-6> 7-12
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+ n; H6 M! I) n5 B/ _1-3 vs 4-6
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Then Weight the Third7 G* a: o" s% _& {4 w; r0 i
3.
- B, q" }0 y2 y- S) U4 B& O: K( p9 Q2 m; L. ?
Suppose 4-6 > 1-3
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Just 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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' c( `; h  ]+ m& W8 Dif 4>5  4 is the fake one
7 D3 p. F+ s) f& o  X; z: yand so on......................

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問題第二步& R6 r; v6 Q& [- }1 u2 F) d

8 n0 l! u' x) ~, [) q, v1 T4 kWeight 1:  1-6> 7-12/ ~7 `$ W" ?% f& K* O/ b# _" V
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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5 p0 Z: _; k5 E4 ]你第三步点去搵 7-12 边一粒???
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問題第三步5 r8 K0 T" s* K2 z) k; D3 `$ H
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Weight 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