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2 x$ ]' T+ r8 }- ^; a
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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)。& C' @' q0 C5 ^. K# ^
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？』/ a- j* C) `: w7 J2 i' a/ X0 B% N
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注意: 1 N& U  Q* n6 W& I" H
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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2 J5 Z: T( ^7 b/ z
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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:
) j# z4 V1 v8 m1 x1 o% q6 q相信e條題目都有吾少人玩...

: K* i0 E, i5 F( B9 R我以前畫左個chart去答,' k# K4 C. c+ o
等我搵下仲在吾在$ q5 v# R/ l- p. J
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當日用左37分鐘答１２粒波子，差７分鐘才合格。' Y  t* P, i. b5 @
13.........# v6 x8 \8 y/ o9 e2 `' p

9 Z8 }/ I' I$ e- c[ 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,7 ?5 ~8 ^9 L5 M; @# ]: K
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:
/ q, q; Q+ Y& m5 \5 L: Z& k唔識隱藏...已經諗到..

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sor !!!....e加改左- O- `% g- c. n# t

2 Z# f: X3 J& L4 N0 R6 A2. 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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7 F) |/ T3 p! J8 x( O3 \8 t[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:$ l- `( i& P) z% A' V, M( S) W9 F+ N
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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$ W3 ]( x* |" yPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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.
% r' G6 @- A3 L- S; w; a1-6 vs 7-12: Z, ^$ e0 n+ D5 W
if 1-6 = 7-12     13 is fake( w: C' A+ w. M8 T0 w

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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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" o$ X8 i" U4 yThen Weight the Third
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Suppose 4-6 > 1-30 J. ?" x# a2 O4 f
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Just like the first Step
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4 vs 5 * x7 O1 m- b+ x5 b. a6 ^- r1 l

) y' C4 y; G. |3 ?if 4=5 6 is the fake one
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0 X4 T0 U" T0 S$ Wif 4>5  4 is the fake one / B2 `* A5 i, \) J+ a( W

" ]  K) q9 A. f4 a8 band so on......................

hello1997

分3組4隻波子秤6 d, P6 n9 c6 f- B! t6 n5 F
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Group A: 1,2,3,4
4 i0 \0 G1 Y7 J/ E0 [/ hGroup B: 5,6,7,8$ `% V1 E2 l) x- ?; H" r
Group C: 9,10,11,12$ G% I/ p9 H, `' j; c
Group D: 13
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! u1 ~% h* U% \, nRound 1# z, w4 Z1 Y9 u. a6 V# C8 C
Group A vs Group B! y" y7 F/ R/ c# `. |/ @
如A and B一樣, 即較輕一粒在Group C or D" A+ f/ z% A, z8 e, i
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Round 2
3 \: I9 U1 ~6 q# Q) q+ c. G) v再在Group C拆成:
6 n9 R. v4 U: t, V& B! Q) aGroup Ca: 9,10
; V: j* ~* e# N; ^0 r' kGroup Cb: 11,12
( n! Y* T) m3 q. ^! F8 C" x5 B然後再秤, 如一樣, 即13為較輕一粒.8 W' `6 v+ e3 @; z5 U9 [

+ E: t, J! y. a8 ~! ~如不同, 即較輕一組有一粒較輕波子在其中, % G' p0 A) V! s6 }) x
要再秤, Round 3, 之後便知答案.7 L* y( p* }+ R1 P3 O. n
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e.g. #1 假設10為較輕的一粒" z7 q0 T9 M' h. L( ?4 q8 {3 W
Round 1+ F' r- e* `4 C! a+ L$ P, G& z0 v
1,2,3,4 vs 5,6,7,8 = equal
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2 S. I& |4 N8 k2 j1 C5 t' b+ {Round 28 {/ Q; {- H6 s* Y) i5 [
9,10 vs 11,12 = 9,10 < 11,126 V9 c; |$ e0 O2 B  G; ^

$ c9 i: k2 @- A3 uRound 3
9 m/ b$ z' @( I; l- y1 N# ~) e9 vs 10 = 9 > 101 T% O2 M( Q* i' j% L. z, b+ X- I

, _3 y  O' {. ~( N9 s' m( Y; |( z, u7 oThe answer is 10.
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e.g. #2 假設7為較輕的一粒" g9 b  c' N! p' _9 ?: _  Z; m" m
Round 10 h& x4 s4 w1 Q
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8+ Z7 R7 z+ S. [) K

  r  S0 b" G" ZRound 2
( @- k" Z& V2 h" c4 o6 P5,6 vs 7,8 = 5,6 > 7,8
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0 h, }7 u# L) a1 |9 Y/ J8 u( hRound 3/ \! U$ H: l! z; p! [
7 vs 8 = 7 < 8
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The answer is 7.% h7 T) k0 [  S5 J

. |! H6 L6 C) ?- ^e.g. #3 假設13為較輕的一粒
. v9 m* y5 o! h# n0 J1 p% XRound 14 H% ]6 P+ N- ?& H! @
1,2,3,4 vs 5,6,7,8 = equal' S3 R- L6 i! Y& \

# V! T  ?$ Q1 \: J( ?Round 2
: w5 D$ k8 m/ s2 {! G9,10 vs 11,12 = equal
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7 q) o2 l/ a0 r$ g  e4 }No Round 3( A: v: P$ h6 w+ e: v/ ~  Y& E

+ G+ ]3 P9 R3 U- r* u$ P9 U$ KThe answer is 13.
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, F) q6 j- |2 p# g7 D. y8 n" |唔知我答得正唔正確呢?!
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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:
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1-6 vs 7-12
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if not
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4 n* P3 i) s$ dWeight the 2 time " K8 c6 F8 H- X9 p1 h. {
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Suppose 1-6> 7-128 w: X# L; _8 H3 b( q
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1-3 vs 4-6
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+ S. y3 W* f+ XThen Weight the Third' H# p% F; B; A. P' \
3.
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Suppose 4-6 > 1-3
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Just like the first Step. a1 i3 Q- ^$ @# c' e
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4 vs 5   E, ~& d7 w4 @. E: |

# p1 K* n/ j: gif 4=5 6 is the fake one 7 h% M" ?" a4 w: u
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if 4>5  4 is the fake one
! q( e" f4 \2 ^and so on......................

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  I( I( o' e4 x0 a' T8 X" z問題第二步( G. [/ e8 ~- i- I0 r. c0 J: C% k$ d
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Weight 1:  1-6> 7-12
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% ^9 N% L# K5 Z9 e4 j& Z# MWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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: D5 k/ B2 p' p3 q% ]) D4 I% `2 ]你第三步点去搵 7-12 边一粒???1 Z/ I% v! l) j3 u9 r
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問題第三步3 i6 n1 N7 V3 g' t
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Weight 1:  1-6> 7-12  X; w+ }& r- O" D

# |7 j6 d' W$ aWeight 2:  4-6 > 1-3 1 }. b9 \9 Q6 m* O% Y, H+ B
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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