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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『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 S0 m4 D% p  w% b1 m% \" v) p' U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？』: z+ ?/ j8 W! V. r

+ P8 G1 b2 x) J注意: , b1 Y7 m! R' L& X
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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7 v9 J6 ]% l4 \/ r" J: T" ?7 H
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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:! B+ Z2 R" u& a$ @
相信e條題目都有吾少人玩...

/ b6 s6 q7 w8 ]  a! \- R我以前畫左個chart去答,
# ?/ I: E. \5 N- O等我搵下仲在吾在. f8 a0 ~0 ~  T0 q5 K4 d
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
( T) w- B3 u% ]& S/ b/ s13........." L2 N0 X9 E8 b1 C, D8 @
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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:" i6 |$ I4 A8 K( L- b

% Q% P2 M& h. ~" [& T! ~我以前畫左個chart去答,
# @/ B4 T* R- |; H- M" l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:
5 R* N9 K$ L5 S7 ~5 d* g唔識隱藏...已經諗到..

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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1 o7 U# j$ v6 l1 g  b
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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:
* |' g  X( R; l) G% k相信e條題目都有吾少人玩...

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$ j) E& h5 e" O/ C  dPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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! n, C- P% M0 |6 Y" c- @% kThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 S- v3 T# ]" r
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6 o- k+ {5 g: M2 ~" z1 r$ i2 nPlayPlay, Let me know later who has the right answer and I will add points accordingly.- a. P* T3 H/ l3 F* d
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Thanks

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9 {1 u# p7 ^2 C. ?! U" O2 R( a0 e不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
5 t4 A& k: N; k1-6 vs 7-12) m' g8 k3 k: K" N' _( v! j3 r
if 1-6 = 7-12     13 is fake. N9 R4 F5 Z! h. |( _/ t
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if not
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! ]$ x; u# E- E3 }0 o1 W. S6 a, jWeight the 2 time * K4 U  c& _* C5 @$ D+ [- O

6 C) ~* l0 s7 M8 ?& C6 CSuppose 1-6> 7-12
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, Y3 n3 d0 {# c1-3 vs 4-6
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/ S/ j; o1 o0 S9 x0 \( F; m0 i9 bThen Weight the Third
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* N" d$ ^( |( T# eSuppose 4-6 > 1-3
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Just like the first Step
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& w9 R( Y: t2 q' S4 vs 5
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  b# K3 C5 X  U4 iif 4=5 6 is the fake one
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if 4>5  4 is the fake one 0 w0 P; r* o6 N
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and so on......................

hello1997

分3組4隻波子秤, e1 E. {+ x, L) e1 o( F$ ^% ?: ^

, p) a3 Q6 ?8 C3 rGroup A: 1,2,3,4
; M7 q( A. l- T4 {Group B: 5,6,7,8
3 A  Z1 @2 @7 H  ]Group C: 9,10,11,12
1 v9 z1 p0 R& _( a  W$ R$ nGroup D: 13
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Round 1( }6 k) B9 ~( N" F( E
Group A vs Group B
0 X3 L6 T; ^5 q9 Y' P% {: p# [- I) h如A and B一樣, 即較輕一粒在Group C or D
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Round 2
# k; B  a8 m0 i+ w$ d再在Group C拆成:
' \* x$ F* d* v! jGroup Ca: 9,10, R! {6 Q: G! y3 ^& Q
Group Cb: 11,12# o2 D' }6 J+ _  P) `
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, 7 [; Y$ U( L. f2 [' s, k5 |3 ^: k* I
要再秤, Round 3, 之後便知答案.0 C9 B( s" J! Q6 ^/ Y' ~4 V: x

$ ~0 a1 |* d/ j7 j+ C; K9 xe.g. #1 假設10為較輕的一粒
4 }: s  h, t" B: u; {$ ]Round 1
) [# _" _$ c) H1,2,3,4 vs 5,6,7,8 = equal! o4 E& v% Q7 b3 }; N* [

3 A2 o1 @# U- j6 p/ h) K7 ?, LRound 2% T% |3 R+ ]% x; X9 {
9,10 vs 11,12 = 9,10 < 11,12! p1 G5 t; Y% x% P! @- S3 ^

+ y, M" X" L! N6 Q5 e: mRound 33 M9 V& y) s! W0 ^6 ~
9 vs 10 = 9 > 10
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The answer is 10., p$ ]; k. d: g; w

% X% h" g: ^( Be.g. #2 假設7為較輕的一粒' q. M, ]) @6 o4 E0 _1 d+ u  o/ S; _
Round 1
: L4 O5 P) e8 b3 t/ s/ M2 W1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ ]0 K, M8 @! }. C. \Round 2: h1 u" a' Y1 m% A
5,6 vs 7,8 = 5,6 > 7,8- c) V+ O4 N' t0 N, R: J5 D, X/ \3 l

9 @" y- G( J) u- F$ s: q( {Round 3, Z; F( n- f4 l8 Z4 `3 H
7 vs 8 = 7 < 83 U- {: @3 X; d2 S  G

1 r# u9 P" ]9 D/ a! _The answer is 7., l7 f* o! A( Q8 L# d2 P
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e.g. #3 假設13為較輕的一粒
5 E2 @1 S6 R# l* c& t; CRound 1( M2 L  e2 D* [" S0 Z; u8 Q$ d* I
1,2,3,4 vs 5,6,7,8 = equal4 S4 ?* O4 V7 S5 z1 j( i5 ^( q
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Round 2
# a6 y, w& e- ~6 l. o4 f2 E9,10 vs 11,12 = equal: D" P4 j% f& g" Z, q" C$ t' S- B

* {9 O! G& k" U5 S/ ^) e8 SNo Round 3$ o" _5 d- n8 H& o" K

5 y- Q$ h6 B4 E* XThe answer is 13.
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唔知我答得正唔正確呢?! * K& Z& R" S7 p" A  D5 i0 y! v
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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:: B" M: D( j: h. }: @
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1-6 vs 7-127 i0 @$ l' G1 H" n
if 1-6 = 7-12     13 is fake
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if not % Y+ d! o0 w$ n' K: \: p
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Weight the 2 time
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Suppose 1-6> 7-128 G* F7 `. P: K+ J8 R, ?6 C1 D

3 |+ N$ n$ L) R0 B& }. V/ w1-3 vs 4-6
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Then Weight the Third
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0 q! [/ U0 e* B, q  b2 S1 Y( ZSuppose 4-6 > 1-3
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Just like the first Step" T+ X; O5 T% ~' s& O% i& n% x

7 }" R. y0 T- {4 vs 5
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% t0 t: A. ~1 C3 L/ D, Y. qif 4=5 6 is the fake one - l5 o: @/ @' c& w" o: Y: Z& y3 j

4 E8 U/ Z* K9 p8 f6 T6 X, kif 4>5  4 is the fake one
% H6 @, Y7 B" e: w* H# h; u, |+ S( uand so on......................

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問題第二步
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Weight 1:  1-6> 7-123 W& C! G: }( ?' A" V1 L
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Weight 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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Weight 1:  1-6> 7-12" T+ e/ [- o  r7 m; q

, V# S0 Z9 b0 x) r0 O! J$ FWeight 2:  4-6 > 1-3 4 i/ Z8 f! ]% e, X: x$ t/ {' u
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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