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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- D  a" _/ u* u' t6 }+ u. t『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)。8 V# o, O' N! T) M) i" H
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？』7 e+ d# ]/ B* W, f

+ f. v  E1 B( M/ c2 d% S( J: Y注意: : z0 I4 A" I% Y& K0 k
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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) n- }/ p7 U. O' C; c

. a' d# O0 w6 k% R  `2 Y2. 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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/ M1 Z4 E8 U. |$ j& E0 R. g" c[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:& |7 Q+ ^! R0 |' M" ]8 c& J2 X, {4 ]
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,2 R  |# T9 f) S1 Y" O6 B
等我搵下仲在吾在/ w: ~4 U% }' X! P
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當日用左37分鐘答１２粒波子，差７分鐘才合格。0 r. k. _$ @0 t, V1 O4 z' |. z  }
13.........
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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:' \; Q3 b) n8 u* |! S/ N) W

4 x& \. e0 m: k6 Z4 ?  o. q, B我以前畫左個chart去答,% K7 d& k3 [! K4 S0 Y8 G
等我搵下...

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- r* _, c( w6 ^) m* P6 M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:+ D3 V4 k/ d5 \- m9 X+ u
唔識隱藏...已經諗到..

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: }+ ?: a- {: A% U% k$ b+ z$ Usor !!!....e加改左
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+ Y1 G3 h# ^. o3 P" Q  d# 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:! A* o4 F. I2 P0 u; k& m8 P; o0 [& j
相信e條題目都有吾少人玩...

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' F- h( O: G. xPlayPlay, 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:! ^; q- J+ p* [" D

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/ B4 m: \% W* C1 vPlayPlay, Let me know later who has the right answer and I will add points accordingly.- z8 Y4 ^. f; E! ^7 T

) u$ Z8 T4 {# c& h6 _) U0 _1 ZThanks

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* K0 k# _( M" e( n  `) D3 \8 g不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12
' C: E9 z! |$ C9 P% a* Oif 1-6 = 7-12     13 is fake! P  v3 i8 `( N9 m- [
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if not
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Weight the 2 time ) U) n5 M4 q6 p4 M
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Suppose 1-6> 7-126 v5 \0 x: j4 n! q) R
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1-3 vs 4-6
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Then Weight the Third
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1 m/ c- ?9 l9 iSuppose 4-6 > 1-35 A9 o8 T$ ^7 k  F- G$ F" r/ Q6 I0 H

) p4 `% v  Y0 u! g& G0 G* n0 iJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one 0 R1 C& R  F# B% c
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if 4>5  4 is the fake one
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! Z) h* V1 ]' H7 Z3 R4 l, Nand so on......................

hello1997

分3組4隻波子秤! i/ v. k) Q% C
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Group A: 1,2,3,4
# w9 t) y) b1 D0 pGroup B: 5,6,7,8
0 A% V0 {# \) Q) O+ z2 UGroup C: 9,10,11,12* l" E, U* U% `$ ]: e# L
Group D: 13) o7 E7 a$ W8 [% K8 l( V: ?

8 p: F) v  b8 v4 I! J0 [! Y9 DRound 1- G1 y& f, g9 {7 l' c; X9 z: A
Group A vs Group B
; ]. J( w! e9 N如A and B一樣, 即較輕一粒在Group C or D
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再在Group C拆成:6 v% h; B1 t, |3 q( Z/ }
Group Ca: 9,107 M$ }, Z( x0 o' o! \: X
Group Cb: 11,12
5 P; T% b/ O. O然後再秤, 如一樣, 即13為較輕一粒.7 D4 O  e3 C( Z

9 {4 h% }- s! ^; F5 d如不同, 即較輕一組有一粒較輕波子在其中, ) i+ C( z4 o3 u; I/ y/ ^3 O* U6 i
要再秤, Round 3, 之後便知答案.
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5 v/ B6 I' y& K# D) S- }$ ze.g. #1 假設10為較輕的一粒3 G: [  V- V0 F5 L% K6 _9 Q
Round 1- ?/ |3 \- ~- Y) U
1,2,3,4 vs 5,6,7,8 = equal
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9 U1 q9 o) }2 m, Y8 R" hRound 26 h' e" N0 H- J0 k, g7 ]
9,10 vs 11,12 = 9,10 < 11,12
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Round 3- z( L( e9 Y1 i# Z
9 vs 10 = 9 > 10, d) _% w4 g; n" g( [0 k  l# n

1 q& f% _! L2 x/ vThe answer is 10.
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9 R5 O9 t* _: D7 ae.g. #2 假設7為較輕的一粒
& x' J# ?8 N' ~6 e/ uRound 1
- Y1 x8 @1 w, u1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8+ k% R6 ^2 n, g9 n6 w1 e
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Round 2
$ H/ x/ C+ N- O0 [9 E+ c5,6 vs 7,8 = 5,6 > 7,8
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! n5 y. V1 |4 A2 R' O, jRound 3
0 G5 Y& S5 e! E+ s. P7 vs 8 = 7 < 8
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- U! Z: Y/ Q. \$ mThe answer is 7.$ {" e3 o( n$ h5 g6 W

' F' c! T: N- m- `0 h9 S" S1 |e.g. #3 假設13為較輕的一粒
, \4 U8 N9 A# B' b- }& c* ^$ aRound 1& g4 T/ n* g& E. i" |8 [, b% B
1,2,3,4 vs 5,6,7,8 = equal& u# a$ \. ~6 q: C, Y1 w
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Round 22 e7 F: _' O. v6 c$ I
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.' s" c3 Q& N& o
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唔知我答得正唔正確呢?! / Z5 s( ~9 g: @2 W9 J

+ s1 T; z3 {5 O5 C[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:. Z. w0 l# r, h2 R- D
1.
1 n- B9 g1 R0 J1-6 vs 7-12
$ e+ p4 u8 Y% V' _+ |$ f* Sif 1-6 = 7-12     13 is fake
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if not
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9 `, ]% V: h/ M4 h7 x% S' MWeight the 2 time " {. e+ y9 g) i
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Suppose 1-6> 7-120 X' G. I8 v1 |5 ~# G% W+ i; d
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1-3 vs 4-6
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1 G. X; E# N1 X# LThen Weight the Third  l6 r6 Q7 |" @+ }
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3 d5 t- S' w* o; lSuppose 4-6 > 1-37 ]2 C% ^. O1 W- O
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Just like the first Step
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6 T: K8 b( K4 s4 y# r4 vs 5 2 P) O6 K4 F/ y1 {; y5 ~( P
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one 0 \8 q4 d# r0 s6 e
and so on......................

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問題第二步" r, ]* S, W1 Y

* l! ^' s, ]7 V. C- _) QWeight 1:  1-6> 7-12
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: E% L' x, b: w: o9 n6 b5 v% |; ?! CWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6: f# m$ ?. {( e

3 o6 Z; n- g9 U+ Z; N- Q# K你第三步点去搵 7-12 边一粒???; c$ E* S1 S  t
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========================================
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問題第三步
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Weight 1:  1-6> 7-12
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8 g& c4 y1 ~8 A+ O2 }1 _. ]7 _  kWeight 2:  4-6 > 1-3 3 s1 h- A1 L7 ]' I: h% }$ y. f

& N- p2 Y( |/ K4 V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