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& W, o% ]8 t8 X3 s3 l- s  k: s
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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)。1 ?2 Z+ m- `% Q' P) \
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？』
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6 s" l4 @( J' \  ~4 p3 _" ~5 o) C& e注意:
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0 j1 v/ ^( i3 H" O4 K1. 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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0 e2 r& V( r9 p  r" _0 j2. 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) R' g" k* S) Q$ ]) I" t
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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:
: M& y0 X9 J& 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 f8 |: W& e/ g3 z. s
等我搵下仲在吾在8 a' Z6 a9 u4 p' d* O/ |
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ S( \- d1 G) u3 v; A* _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:
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我以前畫左個chart去答,
, J7 m! P6 @$ b; {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:; u/ h( F! o8 Q) t- ]# Z
唔識隱藏...已經諗到..

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8 A4 {, e* j0 `6 V1 f, ^sor !!!....e加改左3 Y5 D/ {2 t' Q/ h; w
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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# i7 w9 M) N$ i2 N% T
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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:
8 E' h- O* a- C8 S相信e條題目都有吾少人玩...

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2 H* w6 \8 g4 B2 UPlayPlay, Let me know later who has the right answer and I will add points accordingly.  m# R- p5 d0 R4 f5 g6 @

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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.
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Thanks

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* A4 M% a3 j+ ~1 K/ R! i不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
! @: V, S* a6 M( B1-6 vs 7-12) W6 A6 ?; T# k9 |0 i, ^
if 1-6 = 7-12     13 is fake5 }$ w8 N( _" @4 G/ P

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Weight the 2 time ; x: l6 w- B5 o' R2 ?8 F) i: @
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Suppose 1-6> 7-12
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; G  e) o- H, ?  W$ @: T/ y9 D1-3 vs 4-6
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, T  q5 x9 W% a% a- Z" b' o8 mThen Weight the Third; A3 Q) G: U# G
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Suppose 4-6 > 1-3
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! X: h3 W. \6 P' FJust like the first Step  O( U" X2 ?, p; }4 `* }9 s
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4 vs 5   y4 n6 T$ U, n1 a

7 G" t4 {+ H. a+ P5 dif 4=5 6 is the fake one
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if 4>5  4 is the fake one 0 \+ t3 H  E! G& l& s6 o! N5 U
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and so on......................

hello1997

分3組4隻波子秤
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! i+ j; B$ j2 u: ^$ jGroup A: 1,2,3,4
( t0 H* s; i& E4 b5 ~! M8 @6 lGroup B: 5,6,7,8
0 ]* [% P! ?6 M- ?5 w/ |9 LGroup C: 9,10,11,12& y4 ?/ H$ J9 T
Group D: 13
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Round 1
, N. l4 Y! S% v) G5 J- oGroup A vs Group B
9 O- F' @/ [0 |) |$ K0 p. \. J如A and B一樣, 即較輕一粒在Group C or D
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6 U0 W4 I# D3 U. {Round 2
; Z, a) l9 I2 D* ]# t: c再在Group C拆成:
- q3 F, e% b% H6 ~/ s& VGroup Ca: 9,10. {+ O/ T9 g% i
Group Cb: 11,12
7 @  r3 }+ C$ U& ^# m% |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, ; Z" q9 m/ E6 h5 \, k2 H) L% e
要再秤, Round 3, 之後便知答案.& p- H. j% ~' b+ \4 R. s
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e.g. #1 假設10為較輕的一粒
7 `2 \; Z5 A$ C5 J5 A5 J+ _Round 1
* n; k0 V1 g3 w+ A* I+ Z1 v1,2,3,4 vs 5,6,7,8 = equal
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5 w( J" F2 Y2 Z- O! x; z3 ]. {Round 2
1 ?$ c0 W; j# l9,10 vs 11,12 = 9,10 < 11,120 f2 i$ X0 L0 [( I
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Round 3
4 Z3 b# f1 R1 J7 t! A+ S8 H9 vs 10 = 9 > 10
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The answer is 10.
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4 |9 C6 b% Q2 n7 H5 c/ l( ze.g. #2 假設7為較輕的一粒- N6 p# g1 Z$ L- a% x) U2 c
Round 1
0 Q* Y2 M" \' {* d0 A" F& x; O1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,86 _9 N; a5 A) Y& p2 J
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Round 2
9 t* @( J4 U! x: Z# K5,6 vs 7,8 = 5,6 > 7,8; w+ F: ~% d/ A( M
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Round 3
# j1 m# f" @) e- I: O; J  w; R7 vs 8 = 7 < 83 u* T6 u& p9 J2 P, o; N3 L
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The answer is 7.* U) P% C2 W0 X, x6 p

" A9 d/ b" h9 te.g. #3 假設13為較輕的一粒$ @  b" B0 ~: A( l% n
Round 1
- Q" U1 r6 g! s# f2 p- U! X1,2,3,4 vs 5,6,7,8 = equal, l( D. J! f' c$ F
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Round 2
- O5 g( }% a5 M* @, M9,10 vs 11,12 = equal
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No Round 3
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  c$ D0 V- y7 D7 t+ T* N* M5 jThe answer is 13.
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唔知我答得正唔正確呢?!
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; m6 w3 V4 n* i1 b4 q8 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:9 e9 J6 t8 u* @- x# Z6 W, c
1.
  ]; j* k( }% u1-6 vs 7-127 x7 M& Q, y/ P1 G  X3 _
if 1-6 = 7-12     13 is fake
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if not ( h- Z( ?4 d0 ?. X  H

- [* @1 b, v% M0 m$ IWeight the 2 time
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1 i" |5 ~- o; \Suppose 1-6> 7-12
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# y3 |& G5 E; Y  p3 W5 K+ F1-3 vs 4-6
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Then Weight the Third
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3 E6 D& G! }: E; V! P* {Suppose 4-6 > 1-3
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Just like the first Step9 w( p2 Z, g7 K( L
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4 vs 5
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; I+ V0 ^% H; q" f) jif 4=5 6 is the fake one
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if 4>5  4 is the fake one
3 d, f) U8 u) z. G! I9 xand so on......................

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問題第二步
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Weight 1:  1-6> 7-12; b: v, Q; \; J, t  \% k; }- p
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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+ t1 E+ O" k$ d. B- Z你第三步点去搵 7-12 边一粒???
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* w+ T2 ?6 q8 @& W$ Q========================================  y: }, p' x) R
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問題第三步  s, H1 k+ v( G5 |

! Z# ]% f7 L  G# P- YWeight 1:  1-6> 7-12
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+ @. t2 y$ c2 T; ~  N1 ]Weight 2:  4-6 > 1-3 ; y$ Q) n8 _) y

* Z1 Y8 u% I& b% }! \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