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* S% M+ G- w. v; E' e

* Y; v, t5 }, W" D『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)。4 U. m/ L* g0 }6 u& t0 M% c$ Q. n
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？』2 c# Q- J+ H/ b5 l

) S- i& B0 O8 {' e, i5 z  v注意: ' Y& ^2 I( q. K* j
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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0 f2 ~: g3 T  Y6 S  K" H0 A' |
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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:
6 h$ C; f+ d6 d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,* ~8 i' n' z9 K8 ^
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。5 _7 ]! Y& X& g8 D) B9 i
13.........+ z9 g& q  P& P" |1 y% g( x& x
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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:
! x1 K9 U1 V8 J5 {4 w( _
8 l0 I7 D7 p3 g) W1 ^6 i我以前畫左個chart去答,
9 _/ K, X7 c! c, i1 h8 X1 E等我搵下...

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4 i- I. E& p4 t% |5 Y& @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:  z# G+ I! o* P
唔識隱藏...已經諗到..

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sor !!!....e加改左
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3 O9 x) o7 L1 L1 D2. 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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) W6 @/ I: X; Y/ W& N: F' Q[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:: ~' I5 E4 k  B. N
相信e條題目都有吾少人玩...

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9 ~8 l6 R3 [  d* m4 r6 a5 R7 HPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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! l% s# Y, C. S8 TThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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0 V2 y7 S  U; U8 V3 g4 E2 E$ B) RPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.7 s) Y4 b% d- x, |: q& \5 V3 K
1-6 vs 7-12  o- n4 |$ K1 X2 B2 @- c& X( Z
if 1-6 = 7-12     13 is fake( h: Z- V% |% u2 _
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if not
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+ m2 v7 M5 g! xWeight the 2 time
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Suppose 1-6> 7-12
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: M5 ?& {8 [! ]4 j; a! b2 r1-3 vs 4-6 3 I7 S! Q3 W/ ~$ V

! h9 Z$ S- c3 {* R. t2 w; G2 {Then Weight the Third( I, Z3 {. W- Y: y  B: B
3.
6 v+ t/ u9 x; [  U/ o% k' d& b4 b2 e9 o/ S! C6 i* |+ w
Suppose 4-6 > 1-3
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; K* c- E, O! ^6 a5 a. tJust like the first Step
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2 O' M* {+ r: r0 }, i- Z& h4 vs 5
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if 4=5 6 is the fake one
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. g) s! Q6 t* z8 ]9 @if 4>5  4 is the fake one # r" e, a0 v' x2 X

+ F5 u' E5 L" f" gand so on......................

hello1997

分3組4隻波子秤
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& Q$ r" h4 S8 X& t. |% OGroup A: 1,2,3,45 i# f3 |$ b4 l  ~# m  T" T
Group B: 5,6,7,8$ g6 @7 W& `$ g( M
Group C: 9,10,11,12
' B' n" `  z7 N$ [, kGroup D: 13. z4 l7 ~7 Y" K4 ?) k6 V8 ^9 R

9 Z3 Z8 H: b2 `% ^& VRound 1
$ {7 N6 I8 f, r& AGroup A vs Group B
: x0 R  D, Y$ S+ m如A and B一樣, 即較輕一粒在Group C or D7 h2 n9 ?- g$ ~3 Y3 s; ?. m) }: b9 w7 z8 D
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Round 2+ J; \5 h' Z2 K# B5 b
再在Group C拆成:
' S( n/ j8 u# F. g6 A3 c( ~' YGroup Ca: 9,10; P, G) J0 b0 o0 J3 c
Group Cb: 11,12
1 f% u7 U' c3 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, % C$ F3 e4 q& G
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒. D. w0 G1 _" l0 _/ ?+ J9 |
Round 1
; L. c2 F* j/ A, b. N1,2,3,4 vs 5,6,7,8 = equal9 ]9 f. n" m  Y' x$ v4 h2 e6 K
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Round 2; [+ c! B, j9 N$ D/ h) a8 N
9,10 vs 11,12 = 9,10 < 11,12
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+ i1 y7 E- ?; t* q% h2 x5 nRound 3
8 p6 I) v0 m9 ]7 Y) O/ a: E" i9 vs 10 = 9 > 10
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The answer is 10.) Y7 x$ q& C$ x3 ?2 ?$ W- L) `1 p
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e.g. #2 假設7為較輕的一粒( ~* {- i. V" |6 Q
Round 1) i; R) L7 o+ G( s  n& x
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8$ Q4 g- G& C1 N2 _2 f0 o8 `. O

0 j8 ^9 q# w0 x% k4 l0 sRound 2
# E, f2 {. z1 X  z$ p) ~4 K# Q' a3 C5,6 vs 7,8 = 5,6 > 7,8
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+ f) ~6 g5 V+ C+ Q' G( \( V, @* u5 ]Round 3* e; r, ~) ]* r* j8 D, _
7 vs 8 = 7 < 82 s7 ]% ^, V5 q9 {3 j

% }( o7 m5 m$ m2 C6 oThe answer is 7.
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1 [4 A# |& j; A: p' t7 ae.g. #3 假設13為較輕的一粒
( W+ X% P+ C* f! Y4 g( MRound 1
8 }1 C2 \" k' U0 z9 N1,2,3,4 vs 5,6,7,8 = equal
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Round 2: m4 g9 v& K- j2 J
9,10 vs 11,12 = equal! S. n7 x. q& |5 z: j
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No Round 32 \% m( u! d* _, B
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The answer is 13.
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  ?  I: T8 A( k# r, Z4 `/ t3 U; d' f唔知我答得正唔正確呢?! 4 v7 O3 Z: s! X% ?" L8 W& z9 {0 N
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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:, E. p8 V1 D' k1 O( q
1.
- T) j! k: ~0 f$ J1-6 vs 7-12
) y6 k! q* [/ H/ }8 p6 v/ tif 1-6 = 7-12     13 is fake
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& h/ c! @& `" Y' i3 u) N( Fif not
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Weight the 2 time - h: b5 w1 T) @! e) u! `
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Suppose 1-6> 7-12- }, q5 \3 G) y# }/ D# r  @( N+ W

+ I. l# f: K3 H- M1-3 vs 4-6
2 I0 x0 b% q5 G+ b3 v9 ~& f0 u4 m& V. K5 i7 {" d+ b! S- d; C1 }; j, ~
Then Weight the Third' L! E/ h/ b) p" E6 D
3.
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Suppose 4-6 > 1-3
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4 ?  W/ d9 J3 JJust like the first Step
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& D' s+ Z0 P2 s4 vs 5
6 ?9 I" ^7 h) ]/ ~1 H+ P: `
% O3 W5 m2 {9 a% q; eif 4=5 6 is the fake one 8 E7 S7 k' b# C$ s7 {* ^$ I& W
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if 4>5  4 is the fake one
7 Q$ k3 w  c% Y3 d2 C( K7 mand so on......................

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問題第二步1 H/ T& O* v7 q" `+ `8 [5 u* a; B

& h: N% t+ `/ o2 ^) k3 |Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) Q$ R. }% q8 Y6 s7 W

' v( x7 F/ z+ n4 K. B/ k& |你第三步点去搵 7-12 边一粒???
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; a2 n2 n  @, n3 }3 \2 }/ h* Y問題第三步
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Weight 1:  1-6> 7-12
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7 l0 g% H) j) @0 t$ zWeight 2:  4-6 > 1-3 & ]* |, {5 t8 {4 \* |& w3 d
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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