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! i0 c' i2 W* {

2 B8 p6 N) Z; Y. [『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)。$ M/ p9 z- I$ [
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？』% [9 \% X) e3 s7 Q

! t9 S  J/ N$ l+ W+ z  i& ^; I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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; e# Q6 E! I9 v5 k2. 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6 \/ r( |+ j' F( l# {& |9 a
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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 21:34:2 E% `8 K' G. c9 x
相信e條題目都有吾少人玩...

0 b" T& V/ N4 p3 `我以前畫左個chart去答,, I% _  \# P5 V  N
等我搵下仲在吾在
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& c5 j  S; }6 ]; j! h當日用左37分鐘答１２粒波子，差７分鐘才合格。
! Y- W# L0 J5 T7 ?/ o3 B& O- K' R; h13.........4 G$ u9 M8 F7 \# b5 T% f2 h
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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:0 d4 N: H2 _7 w, A. }: G# \
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我以前畫左個chart去答,$ A- Z4 K! y2 C
等我搵下...

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0 p; l) k7 v" P: ~$ c/ v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:
* K1 i/ }* S5 H0 _唔識隱藏...已經諗到..

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% w; X: R2 i/ D2 S9 v4 F* t6 {sor !!!....e加改左+ h: W; p6 \$ ^! c7 Z9 M; U, e
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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
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
& W: b9 h$ b% E* M) [2 g' d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.: u' U5 i4 H) a" A% o( R5 F
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:+ }; o. b( X3 K+ D5 m/ u

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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

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( N& q# r2 Y/ `8 p% b8 e不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
% R0 w3 s1 W1 W& i1 x1-6 vs 7-12
8 R- f6 v( D6 dif 1-6 = 7-12     13 is fake! w0 u7 j8 u, L% }+ u7 g- |
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if not , E4 |  N6 q- W8 ?

- B* m5 l4 l4 F* O* `0 FWeight 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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Then Weight the Third
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7 ?8 c+ O' p0 I5 C9 YSuppose 4-6 > 1-3; s7 ?+ U8 d0 L& ?9 ?' m# j

0 Z4 t) t2 f# m* H3 uJust like the first Step3 `- i3 B% ]: k0 d

3 `( }0 H& }; p* o4 vs 5
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if 4=5 6 is the fake one . y9 [! M) z& V# B& N

0 S( }7 f# p) f8 v* Wif 4>5  4 is the fake one
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) D  ]" d9 q3 G* N. Iand so on......................

hello1997

分3組4隻波子秤3 R  V  f0 W  K! }" C

' M5 R6 d2 p7 T9 Y4 L. TGroup A: 1,2,3,47 }9 q4 r" Z1 {
Group B: 5,6,7,8' A1 ^! M, E5 Z$ K+ |# b
Group C: 9,10,11,12
9 ~( T! g1 V7 L3 G: ?Group D: 13
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/ R! N. D( h! ^' C2 KRound 1" G* [/ p2 |8 A& Q2 b% Z7 y) `5 ]9 o
Group A vs Group B& j# @! Q' h; p9 H" q4 b4 I
如A and B一樣, 即較輕一粒在Group C or D
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+ m6 j& V/ k; V( e; s4 wRound 2
% r, B0 n7 p8 L4 E  |再在Group C拆成:
* ]1 \6 T& `" g4 m  QGroup Ca: 9,107 O2 Z7 X" U/ e* \7 ~* [" C+ e
Group Cb: 11,120 S9 e3 b% Q0 r& E* [- x
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, 5 d' H6 Y! [4 i* k  U. S* Y- s! W
要再秤, Round 3, 之後便知答案.- r, k& H9 k  y. ?
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e.g. #1 假設10為較輕的一粒
* v4 x1 C0 Q1 e3 [Round 1
7 U, f6 n9 C5 P7 C1,2,3,4 vs 5,6,7,8 = equal! j# e; {& _" [* |7 \
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Round 2; `! Q$ k* x2 R/ G2 ~
9,10 vs 11,12 = 9,10 < 11,127 \) i0 N- P5 Z6 G

8 L3 |- M- e+ h) n) rRound 3
# o7 v! w3 {. {* m5 `' M  m9 i9 vs 10 = 9 > 10/ F  j* [- e' J

4 O+ C! p4 M* B/ @; s3 {$ wThe answer is 10.
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0 `: S; ^7 [# a; u0 |5 y% Ee.g. #2 假設7為較輕的一粒, @, ]6 c& j* Q- J/ b7 V
Round 19 I) p) l" F5 j3 t
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% D; `) f/ P" r- V# r# d9 ^( Z
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Round 22 E& Y& d8 ?1 F9 h* b
5,6 vs 7,8 = 5,6 > 7,87 C8 t, R3 P4 U) I8 E

2 B6 U& a, s( QRound 3
# }% F: |; Q) h& H) d) Y7 vs 8 = 7 < 8
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. o5 Y0 }2 S7 B- w! oThe answer is 7.
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3 ?: [5 [0 s! A" z, ^e.g. #3 假設13為較輕的一粒
/ N1 B- ~' q( m4 b/ [$ M1 O- }' w; _Round 1: j$ K7 E! j: S, w; i- T" w' E9 q
1,2,3,4 vs 5,6,7,8 = equal+ K, K: ?" S* e7 O5 g" j

+ t* o; ?; ~" p8 YRound 2
) z0 @; B" x# z9 h+ W8 j2 [( T9,10 vs 11,12 = equal9 I/ N' A2 @: M9 s* C, h$ B
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No Round 3+ D, A' b& y+ Q9 T

$ \( N$ j6 [. DThe answer is 13.: Z/ o9 g: T: ~1 o# i

% z: I" Q+ T6 @- ~! h% {! g唔知我答得正唔正確呢?!   y' }* S6 s6 }& R' k

  O. d" N% k# F' S3 M[ 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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1-6 vs 7-12
( Q/ ~- R8 o4 q* T& aif 1-6 = 7-12     13 is fake
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! w' Q4 W- L( C9 Z+ I/ m+ jif not
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6 x' _6 h) D  |* F1 n1 wWeight the 2 time
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3 q6 \! k$ i4 [1 XSuppose 1-6> 7-12! n+ c  U1 U+ v" P: g$ B
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1-3 vs 4-6 1 B4 q* \4 M8 ?

2 P, `2 k1 H, h( u# {Then Weight the Third2 q7 S# c6 F6 S
3.
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Suppose 4-6 > 1-3
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Just like the first Step
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9 k) T- _8 C* o! j4 vs 5 0 N1 `) s* l  z4 w

% `8 c: C1 f' |if 4=5 6 is the fake one & K% ^0 j2 z/ |. l2 K
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if 4>5  4 is the fake one , D7 V/ c5 m4 p2 N  J* z6 C
and so on......................

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問題第二步* ~; P" l, C* |! h1 @! I8 Q

  N1 Q. B/ C: S; ^( RWeight 1:  1-6> 7-125 V) ~- k* Q/ o4 H1 h) M9 A
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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4 U! b8 ]: O* L0 q5 v: b你第三步点去搵 7-12 边一粒???5 g8 P- J( f/ q( l9 O( g
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========================================
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問題第三步9 e7 e* g! q+ Q3 V

* e. l0 d: ?' T1 sWeight 1:  1-6> 7-12
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- j# ]" o1 v" F$ G% [Weight 2:  4-6 > 1-3
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3 x  j3 |- f5 ]" M, K) 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