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# N) I& t! z2 s
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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)。5 R8 ~; `' M, n- ^3 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？』( g$ E& K, n# ~2 Q2 E( e

* B5 p% B2 c6 s1 z" k" r! {7 I注意: 4 @! m) v. p; x: g& c/ @

) l! ~4 S- a1 R  E. O5 b1. 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1 ~% c1 o' E" D* x5 w( y8 ?

9 q: q! t0 @  L, a2. 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% q- f) n; ?4 I/ E8 w2 Z0 s

" k1 ^) M1 V+ ~* N[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:' A- i; s: g: ~/ F; W* p/ j4 |/ s
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,' ]7 L# K; G% E
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。0 j$ P. S5 P  t1 m* p' S
13.........
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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:
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我以前畫左個chart去答,2 w, t) a( K1 v0 W
等我搵下...

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/ k2 e1 F  c6 I9 O/ ?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:
& J0 q! Y9 s: a9 G2 `$ ^唔識隱藏...已經諗到..

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* N$ s. e  b4 d! j- t! J! C9 Msor !!!....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5 @; @0 h' W, |

  {) P- z* `. G( X8 U[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:) T  G9 q/ n& p# y& K. k5 E
相信e條題目都有吾少人玩...

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6 x* M4 C1 {3 b, S3 FPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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# I6 ]2 |/ v  x5 \Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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: ^1 h, w: K2 h  a  _  NPlayPlay, Let me know later who has the right answer and I will add points accordingly.( R8 B/ `2 a$ `5 R( N/ x) `0 t
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Thanks

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, h! K: ]7 f; w不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.) X6 k9 b% n* ^( N. _( n5 V5 r+ y% g  s
1-6 vs 7-12& l1 l, d7 H5 }& Q
if 1-6 = 7-12     13 is fake
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- R, e& @. |; X! @# V1 E2 K! B' W2 @Weight the 2 time
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( V; f7 e3 F! z! C9 }( d/ H# f6 R8 YSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third+ }, Y, R5 J% k4 R
3.
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Suppose 4-6 > 1-3+ p- C4 K6 l9 D' z  Z

- a% V& W7 M6 o' S0 |3 U; x5 oJust like the first Step
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% r$ |3 }+ s- w3 h4 vs 5
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if 4=5 6 is the fake one ' ]( M9 S$ t/ s0 l( u! s) P8 j
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if 4>5  4 is the fake one ! B& [' w& j3 Y& _  l+ l

3 v) h! b# b" K1 B8 T- ]. Zand so on......................

hello1997

分3組4隻波子秤
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4 ^+ @  [0 I3 n0 [+ A8 p9 J; P, FGroup A: 1,2,3,4
1 O6 v) @! ]6 J% M, S% QGroup B: 5,6,7,83 _' U. g: \; D+ B
Group C: 9,10,11,12" O  E5 x2 }0 {% B5 }, b  b8 C7 g
Group D: 13
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Round 1. m" h7 C1 ~8 ^# |" c6 T% o
Group A vs Group B+ h* ^* R+ X. x
如A and B一樣, 即較輕一粒在Group C or D
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% \( e! E- L3 a) L! G, dRound 2
+ r' U# A3 h1 K+ H2 _! S再在Group C拆成:7 E, o; U  D( }
Group Ca: 9,101 h2 r- ]- `1 V. p4 c9 m3 f
Group Cb: 11,12
9 \, i- @) g! T; a然後再秤, 如一樣, 即13為較輕一粒.7 x; E" ~6 k$ x, Q: Z( P

/ z0 i, |- |# `9 C如不同, 即較輕一組有一粒較輕波子在其中,
/ C& E- R* n( t+ V. s  S8 q要再秤, Round 3, 之後便知答案., f* w' S6 d1 u; L2 k. u- C/ e
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e.g. #1 假設10為較輕的一粒
) x1 g3 ?2 w- c1 |. P5 ^" ]8 tRound 16 ~+ @  F5 w4 c$ i( d  U' [
1,2,3,4 vs 5,6,7,8 = equal- G0 `! m7 s1 @0 {6 |* T+ \
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Round 29 F0 a# ?( S) G0 I8 s7 X4 `3 g! ^
9,10 vs 11,12 = 9,10 < 11,129 o+ P- r% G- P" s

: M# H3 s1 H5 j4 M' C( N8 j7 WRound 3
) ~3 Q& w4 U; Q+ b9 vs 10 = 9 > 10
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% v- b4 z8 x+ i& wThe answer is 10.
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% ?& S8 Y3 J2 B# se.g. #2 假設7為較輕的一粒
  ~; Q) W5 x- V" qRound 1; l% n. a& s( H4 S- F
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,80 L( s  E$ h! L$ V% o% p

: Q5 t/ Q; u2 d/ ~Round 2; q: Y* P/ I9 Q. h1 [$ F4 C
5,6 vs 7,8 = 5,6 > 7,8. ]6 F" M9 R/ v2 \( b0 a
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Round 3- `/ t+ P8 |* ?, X9 Q- d
7 vs 8 = 7 < 8$ H6 F* K' F, Y4 N. }/ y' u, J
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The answer is 7.
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e.g. #3 假設13為較輕的一粒! h" M% E7 p  Y
Round 1
/ L3 A! `- X5 O% H6 n2 x1,2,3,4 vs 5,6,7,8 = equal
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- E! I7 w1 u7 ?% HRound 2
/ `% h, N" j4 s2 I. w1 B5 u9 j9,10 vs 11,12 = equal
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1 q# g1 R" q/ V; S6 }, ?" H  PNo Round 3
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4 [" t7 ]0 [2 a6 z" S" fThe answer is 13.
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% _7 X# P: y$ _/ W唔知我答得正唔正確呢?! 5 |7 o% ]! J% q. D: X
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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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& \1 Z$ o3 g0 D, l  [6 F. m8 U/ d1-6 vs 7-12
7 g" d6 C* G. |( N& gif 1-6 = 7-12     13 is fake
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if not ) M- d% u1 P; T  C1 D& Q
  V9 X* A$ E" Z/ t5 H2 x
Weight the 2 time
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% }- w/ U0 j, ~6 vSuppose 1-6> 7-12
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1-3 vs 4-6
4 U4 c9 y  I4 h, G! E8 J, I4 H* O: c$ s( Z+ v: [
Then Weight the Third
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) N4 t) R5 n- V) g6 `Suppose 4-6 > 1-3/ a% ]& e" _- D7 a( T, S

3 j4 v2 f6 _: w5 ^# e6 W5 M/ eJust like the first Step0 T7 w, [, G" c# ~' y0 I3 C; N* h

# t& v. C; C: C, @; h4 vs 5
# t# M! \+ n3 H2 H% S1 n1 X& B3 z) r0 ^7 w! L7 R2 m5 E# t" f
if 4=5 6 is the fake one
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if 4>5  4 is the fake one % k- k; N/ W$ Z: |+ F
and so on......................

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問題第二步- J, P0 j, A! z7 L' b% I' I  s

1 q) ]% p; H; Y9 ^. eWeight 1:  1-6> 7-12
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- }, T  E& i( b* u: qWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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問題第三步
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; E1 ?9 {$ k; @1 D5 T& G# BWeight 1:  1-6> 7-12
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5 \% K% w5 ^! l. h: Q# HWeight 2:  4-6 > 1-3 ; o$ j% ?* ~: F9 c3 a

6 K6 g+ O# F& P: u* `7 ?! {$ W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