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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3 i* c9 F# E+ @" C+ _8 n# c" S『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)。
* y1 t5 L. I: I) h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？』7 K9 a+ g1 V4 z' C6 u# r7 g. R
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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9 n- X2 ?' \% S# U9 b! Q
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:. f0 K0 M0 i# T. b, \5 y; ?( _
相信e條題目都有吾少人玩...

7 s5 O$ Z$ |4 G  w* X( D" M我以前畫左個chart去答,
' {7 y( N5 c+ d, L0 w0 Y$ ^等我搵下仲在吾在' }+ e4 x/ M+ c2 K- X3 n; {

0 ?3 o4 G  G4 d0 x) R當日用左37分鐘答１２粒波子，差７分鐘才合格。
' a* n3 m2 r7 q. r/ U13.........8 Z% R3 h" X, S; a; n

7 _! b# v6 N' f  S/ {[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:' T' F5 G, [7 Z1 s9 d9 C. H9 V
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我以前畫左個chart去答,* O6 ^- `$ _9 h  b7 U7 A
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:6 a) E9 u! |" {/ {5 ^% V9 @4 u
唔識隱藏...已經諗到..

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; x% z: b/ e3 F& |. a" U/ d' \sor !!!....e加改左
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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6 B* K, V: m! ]$ Q; h$ F& f

; m. G3 x( P- m- f# T: a[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: x1 c4 M! ]" C4 `! e( @0 H0 T
相信e條題目都有吾少人玩...

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" @6 g# ?, o: E0 W7 F) pPlayPlay, Let me know later who has the right answer and I will add points accordingly.* D$ T& L. M- ?! s& N( C( _+ r
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ D& K" c( L5 z% V+ S) Y- ]& {& a
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.# K4 Q- u( K; @' y8 D3 {9 J; w
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Thanks

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2 b0 x0 X7 t0 ?+ e, M不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
. U7 s8 }  u) K1-6 vs 7-12
( d- |$ }) [- y* xif 1-6 = 7-12     13 is fake
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Weight the 2 time + M5 D) M9 u5 O2 _' E- j  ^% l$ l
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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. _- V" h6 a: R9 B
3.
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Suppose 4-6 > 1-31 L: E6 ~4 ^, ~+ n. i2 ]4 v

8 c+ t) O/ D$ ^; Q7 ZJust like the first Step+ M4 K, r0 t, u0 }# {
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4 vs 5
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% h5 V- L8 v. E! d0 }if 4=5 6 is the fake one
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if 4>5  4 is the fake one . l2 c) n* y* K! e+ c, `" H0 ?

! _* a% M4 |: R% f; a2 v6 S5 ~5 h4 s8 hand so on......................

hello1997

分3組4隻波子秤( l; _# e! N- p5 n4 h( s
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Group A: 1,2,3,4  l  ]* F6 w1 B, U! H& n& Q
Group B: 5,6,7,8
7 Y3 V# m- J4 \* QGroup C: 9,10,11,12+ a6 s! S/ R" I  K$ O. M
Group D: 13% @% F& V" r2 b' c8 w7 X

) Q* B' x. L/ Q$ _: X) WRound 17 f) d1 Q8 Z) L! Y0 p# d- v
Group A vs Group B. K1 e5 t' d  _: \, h+ @
如A and B一樣, 即較輕一粒在Group C or D  @' ?, Z$ u+ a$ [6 O

* ^, @9 S; d/ {9 K' hRound 2
7 f5 h4 Y: D5 N; I; a再在Group C拆成:/ W. t" v) C: C& b
Group Ca: 9,10
  R. y6 L( x# d3 N+ h4 C7 B. KGroup Cb: 11,12
/ |0 S: U! g4 _& T9 x然後再秤, 如一樣, 即13為較輕一粒.
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2 e: s" [1 J: A如不同, 即較輕一組有一粒較輕波子在其中, ! R( X: |5 \9 P- ^$ R6 m" h; Z
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒7 P1 @, ^# U2 q6 X( O
Round 1/ r" |3 y3 C7 [6 [/ |, L: j
1,2,3,4 vs 5,6,7,8 = equal  j- M: _' f& n- w

  G) [" N/ [! q# qRound 2' @3 P4 U3 b6 B8 E- L2 c  x8 `
9,10 vs 11,12 = 9,10 < 11,125 F5 o2 q4 p+ @6 I& O' O, k$ s
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Round 3
5 m! v6 x- ~9 {( g( A2 P9 vs 10 = 9 > 109 t) q$ \% K1 L1 O4 [

$ G2 ~3 }# V- q2 T! _4 [, hThe answer is 10.
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e.g. #2 假設7為較輕的一粒. m  E* k( k4 i; v
Round 1
; o# S8 |; Q/ U- n1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,87 Z; S* \) i, [- H4 |
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Round 2
3 r6 a, L" k& g0 d$ G( ^% H2 v3 C5,6 vs 7,8 = 5,6 > 7,8" C3 s  X6 V# X  T8 k5 a  Y

; W/ C+ x* v/ o+ t- j0 u, F: x, QRound 3. T6 a5 s" ?8 {' E  P8 a/ C+ P
7 vs 8 = 7 < 8
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The answer is 7.# {; J' F' |) T/ x+ l" D  Y
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e.g. #3 假設13為較輕的一粒: s1 V. t% n' z
Round 1
" B9 ~2 L# ?' W3 {1,2,3,4 vs 5,6,7,8 = equal
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Round 20 s- d- g: X. A  n- y  \
9,10 vs 11,12 = equal! c! I0 F4 g3 Q+ Q
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No Round 30 G1 j* v6 k. \$ ^8 d: o$ |3 U
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The answer is 13.
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唔知我答得正唔正確呢?! ; C' i  a' D% p, G* I2 f
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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:
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8 V/ `; d: X3 x1-6 vs 7-12
# D2 \( {1 A+ j7 N  G) Vif 1-6 = 7-12     13 is fake) Y& X0 L9 k6 p* o1 c- M- l* P# _

+ E+ {8 x; J! f5 F- R% p- ?if not
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  L; b- u: n+ }8 J+ U$ r: BWeight the 2 time
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Suppose 1-6> 7-12
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0 Z0 l! y( b- j1-3 vs 4-6 ; f1 k4 n# N' l5 S3 P- Q

) i. J# k9 j+ X/ @- PThen Weight the Third
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& p2 g! m* z( BSuppose 4-6 > 1-3$ [7 w$ S- N2 q4 V5 C7 g  W

7 z# Z, b0 A1 ]: a7 {/ ]Just like the first Step
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9 S: k: ~! m  v5 _0 ?4 vs 5 + O8 O2 r/ Q  I. U

! C# h! g( N$ y5 S; Dif 4=5 6 is the fake one % Q& G- r1 U8 V. A! t# s

- E& K8 H# a% R* k; @$ r0 Pif 4>5  4 is the fake one / D  ]% [3 {6 C  P/ B
and so on......................

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) J. u0 F, f* [9 a' U: D2 Q6 J1 F問題第二步
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Weight 1:  1-6> 7-12/ Q9 v$ {0 j5 w7 o
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ O" X' k3 V3 t; C$ t+ l你第三步点去搵 7-12 边一粒???
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========================================  X' I* H' @9 s& J0 w& M7 j
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問題第三步" Z) W/ X5 [/ G! N8 Z
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Weight 1:  1-6> 7-12& z2 R3 o4 b! C1 q" d

; @2 }. F! U7 M, f9 ?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