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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0 G2 Z, ^: J; k『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)。
0 q# |/ p$ T* U' ?& p7 s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？』
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注意: + `# f7 m% e! {/ s6 v' ^
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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5 t; N: w' S& }- S! {4 D- O
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
- U# M( S. R! y8 [4 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 t2 {4 A) w5 }4 C
等我搵下仲在吾在1 |! a/ r2 j+ K( b1 A6 M: N7 i# S

( A( K- ?1 h. P+ S, i3 D當日用左37分鐘答１２粒波子，差７分鐘才合格。+ [2 Q- P( v4 L" s% n
13.........
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' k3 ^: [; L% O/ X5 p3 g. r[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:  M: `5 z. C. G

! e4 o5 S1 c/ s& E# ~我以前畫左個chart去答," e& x  u# \" z. G  K# O
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:
$ d" i4 W+ X, l0 O唔識隱藏...已經諗到..

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/ o  R( V9 Y% z$ x; csor !!!....e加改左" l9 W! e+ u: B/ F. t
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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4 G1 |( Z, n7 p4 ]% ?* R

" {) ]. _0 p0 F[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:" D9 U7 h$ Q+ b; ]3 H! d  Y7 F1 M
相信e條題目都有吾少人玩...

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! P5 V1 e4 k6 A- g  i, e% i* YPlayPlay, Let me know later who has the right answer and I will add points accordingly.. f2 Q; D0 v* c" X

  {" b; G3 q3 U& K; |4 iThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.9 u# `8 v" j, ^% e
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Thanks

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& Z6 t; n  M% ]" ^" _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% B+ U8 {7 s$ H, w' v3 ]2 g2 \0 m
if 1-6 = 7-12     13 is fake, D$ z- T3 t( d

+ n, r2 l4 b6 C+ mif not
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Weight the 2 time
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Suppose 1-6> 7-121 u$ \4 V! \2 L# K: B' b* t& s
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1-3 vs 4-6
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: C0 V/ H8 \$ H2 }# B0 eThen Weight the Third  [$ J6 `) x1 Q/ q4 A: \$ X
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) u. g: c: n! [3 C* t! \1 _Suppose 4-6 > 1-3# V& r( W* ?7 C$ A' g
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Just like the first Step- c  ?) i' P; b1 ]

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if 4=5 6 is the fake one
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if 4>5  4 is the fake one ! d# J. G/ q5 e6 n
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and so on......................

hello1997

分3組4隻波子秤5 I' S0 K, @8 U/ F6 D3 V: Q$ C
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Group A: 1,2,3,4
! l( k" o2 A  X' D+ `Group B: 5,6,7,8
+ Z7 o7 e) f; y: o+ q" ~0 A: UGroup C: 9,10,11,125 t: y& H3 W5 {2 Y9 e, d- G
Group D: 13! V, {3 Z) E0 l6 Q: W& X4 |8 u

' ^0 Y3 `6 j( o2 }: fRound 10 Y0 s7 r7 R0 |1 J  ~8 H
Group A vs Group B
: g' q+ o/ x, a3 b. z2 G5 _" O4 i0 o如A and B一樣, 即較輕一粒在Group C or D3 S2 S0 @) p9 D$ b  B  E8 M" O

. X$ }( {& r9 J  J) V) f4 zRound 2$ m9 A) j8 h% F- Z  L" r8 d( k
再在Group C拆成:4 z& Y5 ~& B: Y
Group Ca: 9,10( W2 o+ y5 S3 C1 I$ v6 N& n- ~
Group Cb: 11,12" ]; p! X/ ~: d" b% a
然後再秤, 如一樣, 即13為較輕一粒.( Z3 F8 s5 C& j, H/ u+ j9 ]
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如不同, 即較輕一組有一粒較輕波子在其中, 7 F* o' ?9 c; O  _* @- S
要再秤, Round 3, 之後便知答案.. G  F" ~: Q* L" z* e

- g8 z  l* r4 Y: x9 f$ G9 |$ b) ~e.g. #1 假設10為較輕的一粒
' M8 G3 J% q' q/ x" B; d9 dRound 1! p( ^; B* }) I: _
1,2,3,4 vs 5,6,7,8 = equal
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Round 22 t9 h& i) C; `" y+ @+ _) H8 u
9,10 vs 11,12 = 9,10 < 11,12& p/ m6 `( p' c4 s& G
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Round 3! c5 S4 w" t$ H5 X0 j* ^% T' D
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒' y3 o: j0 Z, J
Round 1& p/ p: H3 L" ~( S
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2, [* }# k! C* t1 M4 t! N
5,6 vs 7,8 = 5,6 > 7,8
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  {' m" M/ J$ r/ K! X0 rRound 3- R' f  ^6 L2 M3 v9 q$ ]. A
7 vs 8 = 7 < 8
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2 X1 _# {; @  L1 yThe answer is 7.( u. ~+ N2 t; _5 t
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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 = equal
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Round 2: c. K) z5 ~8 F0 z$ F  y: d
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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3 L8 J( ?9 b6 p$ t唔知我答得正唔正確呢?! 3 l% g  D, X) a6 {+ u
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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:) J: s* U4 p9 \7 M
1.
2 u/ H# ^6 r7 i' U1-6 vs 7-12
/ M( Q: Y2 \* `& s# u- gif 1-6 = 7-12     13 is fake6 V  c8 }" s* r$ ~# m

! u. t$ u: q. E7 P4 ~5 g% M8 Gif not
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1 X% b% @! g" h2 {7 JWeight the 2 time & I( W# k3 w! i  y2 I

% ?. Y! d8 ?5 v4 h" l. [3 E2 YSuppose 1-6> 7-12. B- ~. r8 d9 s/ \( Y
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1-3 vs 4-6 6 _3 q4 P5 W. @0 _

# Q% U" _" c: Y- C: {Then Weight the Third1 e% g3 U1 ?9 x$ d/ t. O6 S9 u
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Suppose 4-6 > 1-3
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Just like the first Step; n& C/ C. K' D' Z4 u4 T

- U6 K) D& g; r  g4 vs 5 4 }$ X2 t0 A" u' b4 @. u+ L
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if 4=5 6 is the fake one $ q- f& z) R7 ?# l. w
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if 4>5  4 is the fake one
* {' F) o) }. m" h5 tand so on......................

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6 d5 U1 V0 {( X: f問題第二步
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/ b" ]7 p" ~3 E, J3 y& uWeight 1:  1-6> 7-121 w2 h. L6 J: p

/ [) Q5 l, r& TWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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" X  L; q$ t: c/ f; y) X9 u你第三步点去搵 7-12 边一粒???$ r2 i; s: j' t6 W% @" A  x7 T) v; u/ b

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) }1 ?; h+ r& X8 P6 V問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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/ R4 U! G8 z: C3 D  [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