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2 d/ `# e. z9 D

, a$ T$ k$ a6 q' `8 C* }『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 T$ v! G8 x# a9 v* b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？』' T& q9 u8 l- |3 E3 X

$ X4 V' q! h0 C% u注意:
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. {' W5 R' c9 M& X" a5 Y1. 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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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  }: q9 B3 F# O- m7 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 21:34:8 I! f1 n8 L; K& M
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,
9 A5 a; R% t/ b等我搵下仲在吾在5 W0 T& s' h* O+ y

, X9 f  L' o+ c當日用左37分鐘答１２粒波子，差７分鐘才合格。, b: z$ L: {: ]4 P9 o" I$ b
13........." V" z$ ]! l* k0 N

1 g' `7 G1 u. T( F[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:3 m5 H+ Q! ~& m4 z! }1 I/ z
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我以前畫左個chart去答,
3 C+ n1 }7 p/ p3 l8 H3 f3 z' P8 j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:& ]1 z8 q6 ]  I) u) q' w
唔識隱藏...已經諗到..

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6 F2 R( n0 L, l: _0 Y; r  csor !!!....e加改左" A8 j, S1 B  O. E0 C- X

- S% G, w* u* J( m2. 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:
: E( v4 J- h2 e) A1 [相信e條題目都有吾少人玩...

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* G$ m. d' k& n# n* V5 Q' I5 dPlayPlay, 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:& v. f9 O2 A3 p; s2 N' J
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.7 ?' a$ ]2 k6 U% q
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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.
8 t2 b0 H$ m4 o1 _& f) a: V; ~1-6 vs 7-12
  `# N' w' X$ ~. \/ A( hif 1-6 = 7-12     13 is fake0 H9 _: c9 e! D+ O* E, ?2 P

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% i4 X2 b3 y3 O  N" R& {' }  ~Weight the 2 time # N' C, f/ o0 s7 b3 m; r6 y

. c. x! O/ L3 Y- \; E6 {& R! eSuppose 1-6> 7-12
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1-3 vs 4-6 - C7 q3 D; V) \+ B  T8 P
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Then Weight the Third9 }. f" I8 _- N( k, }2 l4 g
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Suppose 4-6 > 1-3  |+ f2 R& T" Y: P; H4 K

/ c% w5 R! M% O7 |3 m; oJust like the first Step
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4 vs 5 , ]/ T7 c2 p5 X7 ]& P- t

/ B$ v3 Z# V$ U) T9 ^7 p: X% Tif 4=5 6 is the fake one , X0 i) [& g8 {$ k* y
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if 4>5  4 is the fake one
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  g$ g1 {/ a6 Tand so on......................

hello1997

分3組4隻波子秤
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- Y& c' O4 q/ w$ g, oGroup A: 1,2,3,4" Z" o$ @- n- `/ i  _4 Z1 G
Group B: 5,6,7,8
. D6 P- z7 N6 I2 N! H, @Group C: 9,10,11,12) a3 [0 _! g5 m: t
Group D: 13
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2 Y, f9 n- f1 zRound 1  G: I9 _" g2 c8 {, \2 B) x4 P
Group A vs Group B
( a* [9 z; L$ j3 i. w+ C7 z如A and B一樣, 即較輕一粒在Group C or D
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1 `+ x& V! C$ kRound 2& G! Q, k. F7 i2 f& f2 x; {$ |! N# ]
再在Group C拆成:0 @; \, W( A8 m7 D+ c9 j- d
Group Ca: 9,10
  ^/ k. ^3 \8 |Group Cb: 11,124 R$ k" \) P9 v1 r, X: y# c
然後再秤, 如一樣, 即13為較輕一粒.' K- ?2 M! U1 M
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如不同, 即較輕一組有一粒較輕波子在其中, ! s) W. F; e; e0 ~4 \# v8 {& ~! q
要再秤, Round 3, 之後便知答案.6 Z- F0 D# L# M* b* b& o9 H( V
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e.g. #1 假設10為較輕的一粒
; i5 {+ [8 |1 k; ~6 Y" T1 rRound 16 U- u6 D& K  S9 S  B: r+ N: ^
1,2,3,4 vs 5,6,7,8 = equal+ I9 I% }; r8 X7 s4 r& s
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Round 2
( s( L# c8 J. L& ~3 L" K9,10 vs 11,12 = 9,10 < 11,12
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Round 3
$ P0 K- {+ f8 c9 vs 10 = 9 > 10
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' v8 {4 [3 e( E; Y' O& dThe answer is 10.% F/ p& b* ^+ e; k3 B
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e.g. #2 假設7為較輕的一粒
* Z! u" e1 j4 m( D5 ~Round 1
0 t* E1 U, \# s3 a6 c1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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2 n% z( Z! N, J2 R9 d, wRound 2: S) f+ {( S! f2 c" @
5,6 vs 7,8 = 5,6 > 7,8" ~) B( f/ {4 ~+ U
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Round 3' N7 o$ U; t# W* h3 [% d# K* J
7 vs 8 = 7 < 8' I$ u5 O- h; Q' H" z

. C) G8 I; U; V4 j% f' ^- _The answer is 7.* i8 V5 W& l) o; g

( C7 g4 a1 @4 F( I! L* t+ Ve.g. #3 假設13為較輕的一粒
! I0 F# H7 j" u! K7 e9 T+ qRound 1; I9 B6 J3 i8 I% Y% M
1,2,3,4 vs 5,6,7,8 = equal& T( l0 n* ~* h) Q
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Round 2
& Q" F, A  P" ]# e9,10 vs 11,12 = equal4 i: k3 O$ Q6 c% J" D

' j/ g8 V' f# j' y7 k0 ]7 D4 wNo Round 3
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The answer is 13.* }9 |5 J4 v3 S% W& c
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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:! u0 E- X9 e3 E
1.
4 H, \) K( r9 S' ?# b1-6 vs 7-12+ k6 k8 F0 O  X& j
if 1-6 = 7-12     13 is fake
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* G" X+ N5 w* R+ x4 G+ Y9 \Weight the 2 time 0 c6 }0 G3 ]) ]! x# F! z
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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+ y+ U+ N) z) T$ ^' ]
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Suppose 4-6 > 1-3
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6 E; B  ^& H$ g2 q8 H  F* {Just like the first Step% ]; L& G6 m2 G  ?

0 B* c, U( }' w/ x+ d  K4 vs 5 * u8 X% ?9 f9 \/ G/ i1 z
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
, a( X& Q( k$ n) E% G. z+ u  C4 nand so on......................

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問題第二步' O# @3 c7 q0 F% U: o7 v8 Y' _# q
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Weight 1:  1-6> 7-12
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4 f4 P. H2 W. b) {9 ?, V: w! cWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6. k# _4 K/ Q7 A3 }6 U! {  \; M
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你第三步点去搵 7-12 边一粒???; G& [2 [7 y2 m

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問題第三步
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Weight 1:  1-6> 7-123 \3 U8 Q6 F/ \8 _$ [) A2 \
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Weight 2:  4-6 > 1-3 4 D; v; n. O( j+ z: V3 y" y
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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