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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6 r8 z! k5 k9 e3 G『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)。
9 d* n9 A& o# C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？』0 i$ Y$ _- k- ^6 h
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注意:
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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! c% q0 T$ x9 X
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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' B0 e+ K* `! s' @+ J  f1 D) V. a

* v( P8 v' H4 C6 q+ I: G2 z6 P9 S[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
8 ~/ H: c- T1 v6 N相信e條題目都有吾少人玩...

* Z/ Q- k7 H  d4 f8 g1 j* n, O, I我以前畫左個chart去答,
' L2 K. e/ X3 l等我搵下仲在吾在4 q+ X7 W; i) }3 x, @' Z# H

( L. |9 F2 ^* S: p) q, w/ V當日用左37分鐘答１２粒波子，差７分鐘才合格。
- u4 ~4 R2 e, h, c7 Y- X" W13.......... X7 w$ p) g" p& y+ {! p7 L

8 F& e( i7 S8 X9 u[ 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 o. E5 Y$ j. U, G
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我以前畫左個chart去答,/ J7 Q, w7 Y- A' m
等我搵下...

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0 X+ R3 w! R$ m( _6 r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:. D& L8 }" T( y7 q6 u
唔識隱藏...已經諗到..

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. c7 ^) }5 y( e# isor !!!....e加改左4 m. F2 t0 ~6 Z2 k1 E8 g

. I  k2 r7 n! w+ F' }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+ Z& }5 t1 B& B7 |

5 K/ s: i' X9 w9 k, v[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
7 S9 x, r( i! z  N" L! W- x相信e條題目都有吾少人玩...

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% D3 }4 w  j  y% F  q1 B, ePlayPlay, Let me know later who has the right answer and I will add points accordingly.; G9 F1 E- l# ?; n. z% m7 @2 ^
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:1 v7 O# A0 e: ?4 r1 Y! v7 a

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* n7 Q1 e5 R' h# ~5 P5 OPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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7 X! @8 [* F7 \2 b: {Thanks

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9 B0 f" ^$ F4 Y* `9 p9 e, e3 i# h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
6 d* i) t7 O4 _if 1-6 = 7-12     13 is fake
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if not
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; i$ s$ m# `' R; h8 CWeight the 2 time
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! L5 T# `1 h& k! {' w$ C/ b$ F9 cSuppose 1-6> 7-12$ ?* D* |% |* X' R$ w5 E

/ p0 G: M( M  f( O1-3 vs 4-6
7 H) |5 ]% ?# r: Z/ n# U5 ^! ~+ h! @$ O/ o) |* M0 V6 m5 Y4 U$ o
Then Weight the Third- X, H) V0 N$ ?* K2 E* s0 v. M  ?; X7 Z
3.1 A- H0 v6 o7 B

) k6 x) M2 E5 x( ySuppose 4-6 > 1-3" x8 E% T3 U+ t5 r% s4 m# U4 e6 L) I
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Just like the first Step
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4 vs 5
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2 m; c3 a5 l4 u" r2 @if 4=5 6 is the fake one , B2 e9 o; V* T4 |
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if 4>5  4 is the fake one " z2 r2 o3 G) }* n5 Y. s

4 F8 y1 x2 T! ^+ ]1 Q/ Z4 \7 Xand so on......................

hello1997

分3組4隻波子秤
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/ J+ \- F: s" l( r  `* vGroup A: 1,2,3,4
% f9 E" w7 D) g% YGroup B: 5,6,7,8
& O+ A6 R; t3 h& s* d0 m+ {Group C: 9,10,11,12
8 M& ~' U6 P# E( w& ZGroup D: 130 U& R. E' j- Z* l9 `

1 c8 @& k% Y7 e; I: [$ a$ XRound 1
# D* ~$ t; m3 E. N3 {# T: }) X& p# MGroup A vs Group B
8 o: E* q% n; ]8 l( I如A and B一樣, 即較輕一粒在Group C or D
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Round 2) K  S! P8 @! _; d3 p; }" G
再在Group C拆成:
' j7 a5 o/ W! o6 w$ w. oGroup Ca: 9,10
) D  N2 L: S8 V0 E) S: w0 |  SGroup Cb: 11,12
1 p# ~2 c7 j3 W# s4 R1 n6 L6 I然後再秤, 如一樣, 即13為較輕一粒.5 S/ K; E: q# f$ j9 M1 b9 i
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如不同, 即較輕一組有一粒較輕波子在其中, ' }( r2 V. |" ^$ `. N, V4 v
要再秤, Round 3, 之後便知答案.! X1 Z4 i/ O# \7 ]; S

  \. y7 r- Z3 L+ C! Z" e, v0 B( q! Ye.g. #1 假設10為較輕的一粒; `$ n  `* N* }7 `5 b
Round 1! J3 ?; Y, I9 R8 d( o! k+ F9 D% _
1,2,3,4 vs 5,6,7,8 = equal+ k& H7 _; s& |6 G8 G0 _
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Round 2- i( s  L' G+ y9 r% J  {7 y
9,10 vs 11,12 = 9,10 < 11,12
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- C7 V" T* o9 L4 k2 Z  m1 pRound 3* J$ p9 B% b. _0 \
9 vs 10 = 9 > 10; c/ u% t! t: C1 {( c8 g- p0 [5 ~

2 D( ~! Y/ a( M  ^$ m: lThe answer is 10.
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% q7 S0 ?* i7 `& q3 _/ N% S5 _: ~3 _7 oe.g. #2 假設7為較輕的一粒
2 k3 g6 h8 m" l( G. X( @) _& XRound 1
0 T* [  _1 ?. T' T& S- M) B1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8& M; j0 ?; A5 b2 ~7 h! ^6 |% L

! M# p6 z% X7 j$ T  }Round 2- `2 p( S: B. L9 u
5,6 vs 7,8 = 5,6 > 7,8
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Round 3. J4 Q+ [5 w3 _& z7 U1 Q8 u
7 vs 8 = 7 < 8
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The answer is 7.7 O4 |& i  X% J$ y" W

- \- ~0 S7 ^' u5 P6 h: ge.g. #3 假設13為較輕的一粒. ^: q7 p9 c3 j6 a+ w" y; O! W; X
Round 1
, @2 [/ a! w: ~* Q" }# X# }2 T9 n1,2,3,4 vs 5,6,7,8 = equal1 t" E$ Y3 N- q' d6 n* F& t

  N+ o* r* B5 _1 b% YRound 29 T& }8 w2 M6 J+ {0 \
9,10 vs 11,12 = equal- F7 R! k2 p  E) w

6 \' L5 S: q  \" U6 m+ ]6 LNo Round 3
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0 i& ~$ [- I; Q; U% SThe answer is 13.
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唔知我答得正唔正確呢?!
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3 {$ g! \9 \& h, V$ V4 D2 A8 y[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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1-6 vs 7-12/ T5 N8 y9 ]9 J/ I3 i
if 1-6 = 7-12     13 is fake( f2 y) ~0 s  T: {. ^

# [3 g: @; i4 N+ g# N0 ]if not 1 Q* f; W" D: l8 p9 W
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Weight the 2 time 7 @0 }6 Q8 j8 t% L3 s* j2 _
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Suppose 1-6> 7-12$ {6 `% U* s& n

9 ]% G1 t3 Q8 N3 L) j3 j1-3 vs 4-6
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Then Weight the Third4 n3 ?5 t' H/ ~
3.3 e& z2 Z' z* K6 l

6 a4 K  W8 j" W& l' S& ?2 tSuppose 4-6 > 1-39 N" T6 U5 k! c! }- a, |  m" S- E

1 b3 C2 x+ K; r" U! |Just like the first Step
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: G# {4 H' W5 a2 e4 vs 5
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if 4=5 6 is the fake one 7 G9 P! ?% ], j3 O2 ~4 _
. ]% Z# ^( `; Q. p0 C9 t" v# x1 r( x
if 4>5  4 is the fake one
* }6 u1 h6 Y- c: J' R* uand so on......................

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問題第二步
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5 Z! ?' ~1 H2 N/ l& e( [$ XWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6. |- q! c1 h1 a! p7 @! H
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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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# Z1 \8 o: ^4 t: }Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 7 U5 U8 ~$ F* p/ @$ H5 `! Y

* @$ I: T% Z1 I$ n( Y' ~2 N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