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0 l3 V3 N" V# c: m
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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)。, H4 P3 V3 W3 k9 x+ `9 s# 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？』/ U4 ?- W5 P2 H" O6 o3 ^6 X

" R( r/ R% u  R* z; K注意: 9 f* o8 ]1 U) a3 C6 u0 Y( q. h

6 Q* d5 [, A, a! r! {% g: q% a, |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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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/ f" l+ r8 S' g3 j# b) `6 ~
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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 21:34:7 j4 {7 ~$ Y$ y* J
相信e條題目都有吾少人玩...

9 [/ t3 G5 R- W! N% k! B" i我以前畫左個chart去答,
; Q0 \7 M& s9 G) a! M* e1 z; p0 {等我搵下仲在吾在
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# j! i( }& p* M) T: K0 D( p( q當日用左37分鐘答１２粒波子，差７分鐘才合格。
/ K! f# J  y5 j7 t$ r  \, }- [13.........
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1 w  N3 K( X3 M8 k[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 |* F8 a+ J% U6 m2 J, B. q) N* W) u, B
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我以前畫左個chart去答,
- G& T1 C2 f5 {) M, p9 d" e1 \0 Z8 N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:" V3 l8 v& L3 A) Z  |( }; n# y
唔識隱藏...已經諗到..

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# v; ^/ |1 @9 L6 Hsor !!!....e加改左9 m6 Y% w* e6 [( W6 b4 N3 f

! }$ p: y- s+ L; S1 V3 Q, c2. 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:
& A$ K: B7 `6 X( w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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.8 M/ X* y, j! E, y; u/ u( j
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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.
: v% k3 G/ ]0 {* F0 @1-6 vs 7-12( V% a3 ^% a" H- }) f& p1 F4 S2 ~
if 1-6 = 7-12     13 is fake
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if not 2 j, d$ X8 i* b3 m* }
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Weight the 2 time
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9 i( S' {* L. O. iSuppose 1-6> 7-12( w2 {1 J$ g2 O& Z0 T

  U. p/ g( L3 \9 G( {( O1-3 vs 4-6 1 C$ x6 q. P3 r4 V- V
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Then Weight the Third
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Suppose 4-6 > 1-3
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( o) z' @! }  C5 j2 m' }8 vJust like the first Step5 y# @6 L$ O0 t2 s

; D1 v. B5 W8 {* @4 vs 5 " l" L/ k6 t# s& j8 C8 W
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if 4=5 6 is the fake one # h  N0 b6 ^4 I3 W+ l3 l, w  ~
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if 4>5  4 is the fake one
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2 x& n# T* d0 _1 n0 X6 Xand so on......................

hello1997

分3組4隻波子秤
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  x8 W8 {8 k5 q' }! ?Group A: 1,2,3,4
# f; z; x: R4 QGroup B: 5,6,7,8; e3 |( }  T+ b& b
Group C: 9,10,11,125 I7 ~8 M/ K; {, W: T% K8 T
Group D: 138 w; w" ]  V6 W2 L+ o
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Round 13 _4 c% H. n7 n3 B: X' C
Group A vs Group B# r/ p% e6 r* {# B4 A, o9 C; C
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
8 z$ G0 N5 H* H! l% Z再在Group C拆成:) r$ S0 ~: F8 ~* ^- D( Z
Group Ca: 9,10
9 @& l) J, ~1 K' U) f* Y  W: LGroup Cb: 11,12
0 ]2 l( F% e, X然後再秤, 如一樣, 即13為較輕一粒.
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- g* m. r$ R( I: o+ t如不同, 即較輕一組有一粒較輕波子在其中,
0 s: R7 Z5 n  O. Z! `+ f4 g要再秤, Round 3, 之後便知答案.( Y. g# F; J2 |8 C- g8 s: L4 O

# K" n  J. ?: ^* {! w! T7 Ce.g. #1 假設10為較輕的一粒4 \- f3 y! }) d+ m2 u
Round 1% M. ]$ m) s" M) f
1,2,3,4 vs 5,6,7,8 = equal' Q! o: q8 m$ |$ r* J, G

0 I$ i% a3 _- w% L& O7 S  |0 x$ N0 rRound 2
# @3 L9 `9 C1 y6 G3 ^3 f9,10 vs 11,12 = 9,10 < 11,12
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Round 3
+ I2 {+ U3 }6 F* n# X1 Q9 vs 10 = 9 > 10
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; v8 N+ B& R4 P# [8 sThe answer is 10.4 E9 m  K! t* |# I6 P. g3 q: P
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e.g. #2 假設7為較輕的一粒
/ e/ v1 K( l5 m, H$ Z& D0 M* j3 ~/ jRound 1. w' M4 |$ I4 n3 a. h
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,83 n, h1 i3 V+ M0 a. n/ Z# I

# h1 o8 C  a$ @9 Z3 \, JRound 27 K4 n4 d. _" D, Q, D
5,6 vs 7,8 = 5,6 > 7,8
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" [5 w. \8 Z2 p4 t3 lRound 3
9 A+ m3 L: M) ]" \% x% ]4 E' c7 vs 8 = 7 < 84 p$ X' s( x  Z( m6 O( |
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The answer is 7.
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e.g. #3 假設13為較輕的一粒5 m2 I, L% b0 t/ i
Round 1. N5 l8 B, d6 W$ |) b; f* V1 u
1,2,3,4 vs 5,6,7,8 = equal5 j) n# X+ F3 h, E5 U: ~) Q: m

/ R0 }' J0 R, l( A5 }& [Round 2
0 F, p- P6 J7 `" D5 A- ]9,10 vs 11,12 = equal
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- n! `0 X9 g6 T1 Q% z# H* jNo Round 3% \, z( k' H7 n" k2 m

7 C3 M0 k  M* sThe answer is 13.- r# B+ ?  [; w7 h% c- d
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唔知我答得正唔正確呢?!
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) a( {7 X9 x. d  n' |8 P# J[ 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& H$ O- W& c+ p1 V/ k" S
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1-6 vs 7-12- q. |' ^" [6 v6 M# K, ?9 o6 i( b
if 1-6 = 7-12     13 is fake# H, Y; T4 I" v

3 }: P0 [0 ^5 [9 V) L$ lif not . y& G7 b7 X2 f( a' K1 g1 U. g

2 k- S3 J0 V# r. R; Z7 c+ jWeight the 2 time
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Suppose 1-6> 7-12& a! _0 y  G6 z4 J" l( F( r# B

3 f. {5 Z$ Q; u' {* l1-3 vs 4-6 - |6 l4 g: |0 H* _9 Q1 B
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Then Weight the Third4 Z* y3 X' `. y3 ^; n" P
3.
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# D1 n0 T3 O+ `4 D' C* J6 m. gSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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9 N# N0 ]$ t$ xif 4=5 6 is the fake one
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if 4>5  4 is the fake one
, W2 a/ t  r/ W) P$ m) P8 u6 {' Hand so on......................

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' a# r' ^5 J, F5 s7 _3 Z4 T問題第二步
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Weight 1:  1-6> 7-12; }9 y5 ^# ?) s5 A. G4 T% y( w
( [( m# w1 ]% p+ y$ P0 e+ a
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ T! h  {( }1 W& g8 h6 O1 }: M你第三步点去搵 7-12 边一粒???! Q7 J+ X( y/ v
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1 r9 }0 D2 J  l! e問題第三步* C% m# n5 K) D9 Q8 Y- n+ v

& P( h3 C1 i$ U& E& ]" y9 HWeight 1:  1-6> 7-127 ^* E" O/ ]. R# R3 n% v+ g
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Weight 2:  4-6 > 1-3
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1 U, N7 l8 A) |1 H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