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* n9 U+ A# I; ~6 O
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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)。! T* t/ h" F: F" W  X
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？』: B# f% y& z& o# |
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注意: ! o  e8 ~5 ~) j6 l

' e, _: D9 r- n: {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$ _9 k, n4 T! W6 ?3 N5 f. @2 d
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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0 d, s1 }/ r% }* p+ ^5 m1 \" Z' @4 o

4 I( }, F0 X5 b; x) ?' b, j& G0 m$ `; R[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
- x9 V6 Z- m" m  w0 T相信e條題目都有吾少人玩...

  \+ t; d/ a. q1 p* V' S4 h我以前畫左個chart去答,( B4 K# O0 n$ ~, U. {4 S, ?  r
等我搵下仲在吾在. M2 c$ c/ S( U
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當日用左37分鐘答１２粒波子，差７分鐘才合格。' ^7 L+ `* L. O5 `/ W) q
13.........! H" W+ _% d5 P# e% V8 ?& J3 `

7 A" d6 ?7 u( x$ p% u0 _2 Z[ 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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8 m0 B" A4 c/ A. G+ A5 ?我以前畫左個chart去答," a( `/ T, i# d6 P2 ~- m- \2 a1 x
等我搵下...

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; U6 U4 k) k- o$ q8 S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:
; H3 t7 }# O% O6 z! i, \+ k( E唔識隱藏...已經諗到..

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: K, b& T. f6 Q; [& B& lsor !!!....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 U- {* r* ?$ }3 D+ c3 p

4 v- c4 V0 c! U: M- U6 e* 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:
/ v* V9 K# ^' R8 J  I6 E0 T4 R2 T相信e條題目都有吾少人玩...

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. K0 v* Z- a$ J' G9 UPlayPlay, 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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4 h' f( ^' F2 TPlayPlay, Let me know later who has the right answer and I will add points accordingly.: ~( ?3 ~1 ^' `! W3 e

8 Y, r2 C0 G, J7 `* `Thanks

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9 b" W: b* y& I0 j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
, R2 L( j- E: G) gif 1-6 = 7-12     13 is fake
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$ |8 p% D3 k/ O1 _9 \if not 6 R, c$ u5 U: P* S1 D4 T' K* E
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Weight 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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+ Y2 H' t/ k& w4 w* Q2 g$ t# s; FThen Weight the Third
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Suppose 4-6 > 1-3
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' ]. }7 }5 o0 q$ z4 cJust like the first Step
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3 U+ k* Y8 X- J8 f9 }4 vs 5
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if 4=5 6 is the fake one $ u8 N6 \  |! X) E
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if 4>5  4 is the fake one
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6 \) }) R! i, f2 t/ V  R! Aand so on......................

hello1997

分3組4隻波子秤
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& P% q% ?7 r; GGroup A: 1,2,3,4
' v+ W* h2 S6 c; f! iGroup B: 5,6,7,8
) \$ A/ x) T  X; D8 L" T0 @: mGroup C: 9,10,11,12+ S# W& L+ ^! x1 A% V  [, s
Group D: 13
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Round 1# g! [" H9 B  |  y
Group A vs Group B) ?7 u% p( C9 ~/ \. S
如A and B一樣, 即較輕一粒在Group C or D
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# m  v7 i! m3 H! ]( E1 t" FRound 29 c9 Z: i2 Y: g. k. c
再在Group C拆成:
2 p3 K1 @' `/ b) cGroup Ca: 9,10
. @& L5 l- q( q/ N# \Group Cb: 11,12. A( e7 @* L. W# b
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,
) A% c/ e% t2 i9 T要再秤, Round 3, 之後便知答案.4 n2 O% Q$ g: N5 @4 K& }2 m9 L% q- b

( L' ?7 @4 J! t7 `1 i' s: De.g. #1 假設10為較輕的一粒% V3 `& n2 ^# f# p5 E8 ]3 {
Round 1
4 i7 Q& c4 L, ?: v4 Q: J* {; I1,2,3,4 vs 5,6,7,8 = equal+ ?6 X7 G& \, u- z' o- C

1 m, l9 x0 N( n: H  iRound 2# u2 x/ R' W6 G
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
+ m; D3 H* m% v3 A* D1 y: Y9 vs 10 = 9 > 10
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4 G) w! k0 F9 w  nThe answer is 10.. c; r( Q! f0 T0 I+ x4 |2 Q

. i$ J, M5 p, x* E9 o) ?0 H/ A1 C) He.g. #2 假設7為較輕的一粒
3 t7 F3 d+ t. c% H8 D' j/ qRound 1
9 G, }: u( z* @% K& p7 I. O' i1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ [! `8 D5 `4 F5 M% l) ^2 \
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Round 2
. g6 d* ]: y, A5 t0 l5,6 vs 7,8 = 5,6 > 7,8
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' R) @1 L4 s; s9 E. Y; sRound 33 b6 o* e* g8 x( ?* v' t( o% c
7 vs 8 = 7 < 8
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The answer is 7.
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2 ~: b3 Q1 w, }9 `e.g. #3 假設13為較輕的一粒- O! Q7 F7 T4 }  i$ C# |' ?
Round 1
5 i% g) K% s# R- T1,2,3,4 vs 5,6,7,8 = equal6 ?* L& m. M$ y. [. F
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Round 2
3 K+ R! f3 |* `0 W' q3 ^9,10 vs 11,12 = equal5 A' w& |& J, b

5 ^: \$ K: J6 L: e, C, WNo Round 3) G5 h* p% G% a
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The answer is 13.& E' U; }5 K  W- p* f, l4 ?

* D1 }% d4 G& K* z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:# p( T) g# A) O0 I
1.0 d+ m0 J: Y: v4 @
1-6 vs 7-12
2 e' o# w( j6 }. zif 1-6 = 7-12     13 is fake
4 c; i  H/ `% S
9 w6 P. {& \6 N) a6 f4 {if not
$ ^9 x# h' _6 A7 V- [2 s
0 e- N$ w( y. x8 f6 q) J" LWeight the 2 time
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: e, A/ Q+ Q# Y+ h0 Q' \: C, W! Y% M+ SSuppose 1-6> 7-12
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1-3 vs 4-6 4 O' s: A% O7 }/ x$ M6 E

) Y7 ]+ M6 y2 `Then Weight the Third# m4 E, R( H3 A. o3 r& H
3.: G" c( w% K5 |  \' V9 y) d
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Suppose 4-6 > 1-3
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Just like the first Step  \, S# u( k; k. R0 E$ Z' h

2 s0 B6 G& [! B+ b3 Q  B( j4 vs 5 1 q- L% e7 r* l3 d( J% G5 t

8 H* E7 W% y# B) S, w' Tif 4=5 6 is the fake one ; f# Y; f& i" n9 v$ _8 H

- R& N7 J! ~8 ]+ ^2 bif 4>5  4 is the fake one 4 d( Q! X, @! W; X& u, L/ p
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12) o7 B# \7 a; p) ~; L' u4 ~9 h

  T& T& [" `$ }4 U3 lWeight 2:  1-3 vs 4-6 , if 1-3 = 4-64 ^# W5 V8 ]3 K0 h. Z, y" j' Z
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你第三步点去搵 7-12 边一粒???
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========================================- K; w% K. \( m4 D/ O6 ?/ i( X

6 N) ~) S, Y  n問題第三步
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Weight 1:  1-6> 7-12: E, o2 D1 M$ R: h' x  `# U
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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