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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『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)。
$ x3 v6 P" T' ]$ Q' ^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？』6 J2 r. T4 A) G4 @5 V' \

4 X8 J3 M$ L# ?! T5 u注意: * s9 p& x: M1 o7 ~& E6 j* M% Y
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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
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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# K6 P8 T- w6 S. D- T; q

& C3 @. G8 U6 b, [; w3 `[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:  o  f+ r5 V, ]$ _# N1 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,
. t+ [6 Z/ ?8 f/ w5 K; s1 I等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。+ T9 g  h# D! Z0 B7 I) d
13.........
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! R4 P& X  p/ v4 m8 x8 b[ 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,# W2 e1 D0 j5 @7 N% {, r& L
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:
6 \/ y! w/ f1 j' _7 `  \唔識隱藏...已經諗到..

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sor !!!....e加改左. v9 j2 |, ]% B: F% d
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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! a5 }) Q: X+ @  u) g4 ^6 e3 ~
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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:
, z( O# J" i/ g3 e5 n. e; }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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& ^4 l; \' `3 n7 M3 W6 q- |PlayPlay, Let me know later who has the right answer and I will add points accordingly.; |# v7 {' O  P+ L' w
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Thanks

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- u4 Q# E) @) v0 w7 `不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 i7 Q; J: k" v( A1-6 vs 7-125 O; v1 U7 |; R4 q# @
if 1-6 = 7-12     13 is fake
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Weight the 2 time 3 P; O( y" u# G( H% c" _

  L# j+ e: {% m: M2 u) SSuppose 1-6> 7-12. X7 Y7 [8 N- `, Z( q
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1-3 vs 4-6 2 ^0 G" Z7 M6 L

( L* J" A& C, x) Z) OThen Weight the Third, I0 [, j1 P1 T% h. h# @
3.
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Suppose 4-6 > 1-3+ a8 \! m  w" }) ?8 V' [" }) h

" c2 I' [9 U9 v: y6 sJust like the first Step- d" [7 v: m, o

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if 4=5 6 is the fake one + H0 _5 u4 J# i4 y/ m8 c: H

& p: r$ S' b$ l; s+ O' yif 4>5  4 is the fake one
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" F7 {. y" y' X# Qand so on......................

hello1997

分3組4隻波子秤( M# r) Z! q# Q2 N  |7 [6 d) L

5 d8 M' E5 l$ {, _Group A: 1,2,3,4& F% P3 f0 S0 ], d5 [* t
Group B: 5,6,7,86 ?$ T5 F( i- J# X9 I' \3 Q
Group C: 9,10,11,12! [; ]6 h6 A' s9 y$ r6 ?4 K6 H  B
Group D: 13
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6 C/ u4 C) w9 [% x# k$ LRound 1, K/ _/ j% q; v1 ^
Group A vs Group B2 G6 M( z  o3 ?+ U* A: y
如A and B一樣, 即較輕一粒在Group C or D0 v. }0 U$ ?, B1 |* r* Q6 h) {

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再在Group C拆成:0 c+ R! y. r$ F& O' Q
Group Ca: 9,10. ^1 `: ~, c$ J, l/ P, S! @
Group Cb: 11,12
8 ]9 K0 E# J7 n% Q  w, V然後再秤, 如一樣, 即13為較輕一粒.7 c5 P4 \' U; y2 w6 K

3 [. L( q/ a9 Z, {) \4 Z7 Z& n如不同, 即較輕一組有一粒較輕波子在其中,
* y0 U& u( Q5 a要再秤, Round 3, 之後便知答案.) N' M- h: {/ Q

! ~! B7 C, K4 L( Fe.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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Round 2* g6 x. p4 p1 X7 P9 L' \! }
9,10 vs 11,12 = 9,10 < 11,12" g# W, Q+ R( W
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Round 3
7 {7 A; ?. U: a6 B9 vs 10 = 9 > 10
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/ K* B' u7 e; A) K) R; e4 ]The answer is 10.
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5 W* d1 E  K- @2 se.g. #2 假設7為較輕的一粒
. J5 v) W4 q# j' d& C" jRound 18 k6 k% S# m! v' e3 ?% O
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* D7 i+ @1 Q9 _. l7 [9 {! s* h
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Round 2
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Round 3' W" r( D2 k- s# Q$ s
7 vs 8 = 7 < 8
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The answer is 7.$ `( r' G& L( ]4 x* y( D
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal
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Round 2
( |" C* M* E% A/ O$ G; @1 m9,10 vs 11,12 = equal
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9 \4 g4 j: q! t9 W7 m- DNo Round 3
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The answer is 13.2 l* v- v/ X& V( b

1 F" c+ K. F( e! ]+ _唔知我答得正唔正確呢?! " w3 d4 s! n- L- `! l. N5 R, N
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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:) Y- |4 D& S* F0 v4 Z  m
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1-6 vs 7-12
" _* J/ |9 t) A1 F- i. Iif 1-6 = 7-12     13 is fake
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8 E, w: g: Q6 Z/ W$ |$ o: V' |, dif not ' ]. F9 l6 S9 D/ v9 G$ }3 D
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Weight the 2 time ' V* c1 x8 Y0 v0 H& i7 }: V
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Suppose 1-6> 7-12
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1-3 vs 4-6 : o$ ^  S  ]. }# X
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Then Weight the Third6 M9 \6 C0 n/ {+ A
3.
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# A4 f6 l+ K5 L4 m- ~6 {' gSuppose 4-6 > 1-3
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9 R- E. ~- K; V1 EJust like the first Step
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+ J0 G, n: d, g  r* @4 vs 5
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9 c7 r; @* a" M& G# H, H7 Y0 C% j+ L8 vif 4=5 6 is the fake one 6 P& P8 f5 a* c
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if 4>5  4 is the fake one 7 _7 R; Z+ G6 ^7 v' T) K
and so on......................

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9 V3 _/ @" h' U( E問題第二步$ v! j' B9 E" K4 m2 e5 i2 i; [
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Weight 1:  1-6> 7-123 L# q7 i0 k6 P+ [* a* U, }& w0 w
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ l. O: A$ Y9 o1 @% p你第三步点去搵 7-12 边一粒???1 w" O9 a) H) s& A; c, r# |
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========================================
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* M6 C  C1 z/ q* |- a  z7 A* [" G問題第三步$ q, {9 {+ \2 g" v1 W, h+ D& x
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Weight 1:  1-6> 7-12
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# g" c0 C& L( Y. B% WWeight 2:  4-6 > 1-3 ; H* O/ s8 A6 n. o. [

1 F/ F6 L6 l8 x; z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