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)。' u5 i4 G2 h' v- j- c+ X# ^! g
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？』& B( I/ Y- ]7 W4 F7 V0 n% d( K" B
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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
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6 c" |! |6 i9 i; F2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
$ r/ a9 d* a* t* ]2 B$ e相信e條題目都有吾少人玩...

( u: Q1 f9 u# P2 G8 u我以前畫左個chart去答,
. q& J4 N+ {  @9 w等我搵下仲在吾在: s3 Q1 F) r- _
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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," q/ f, p: [2 O9 D' r
等我搵下...

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4 J  g0 W/ V) J! j, C6 j. d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:7 S# A, o5 [/ M3 q  X6 f1 H: o
唔識隱藏...已經諗到..

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' b9 ^# G' |  j' `! Isor !!!....e加改左2 }0 l( V. G- t3 \( _) R1 p( y% `7 P
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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
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' S5 F$ t, z$ U' T- o8 S. w% H[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
' I: z/ x5 K/ @2 s1 {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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3 a0 ?4 `* X2 G/ MPlayPlay, Let me know later who has the right answer and I will add points accordingly." S# K$ B0 K8 r: r. k3 }4 h4 R

: l" T$ M' Z* ]) mThanks

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! l, B3 t# s1 T3 M不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
/ u' z1 o2 _  d. \  y$ s$ R* v1-6 vs 7-12, o' w, K( D6 C7 z$ I, R4 {) B
if 1-6 = 7-12     13 is fake  ~* }- t9 _5 @2 i& y- e

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Weight the 2 time
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1 p% j& V8 g7 w, g, n9 aSuppose 1-6> 7-121 d2 t5 x, w/ d, r" Z7 r+ D/ J  W
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 . I7 y9 J* z0 i6 R) L
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if 4=5 6 is the fake one
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% w1 x  ]! j) X" d# Jif 4>5  4 is the fake one
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7 }' g5 ?7 [( q" d4 `and so on......................

hello1997

分3組4隻波子秤- g2 d$ u! I! W6 H5 v# r: h4 [$ R- c

$ O/ e' _( `2 Z# Z8 JGroup A: 1,2,3,4
  O; k: c/ w0 Z5 [: d* HGroup B: 5,6,7,85 U5 Y: U5 \( l7 S; v1 x! G
Group C: 9,10,11,12
0 [# {8 o. M! t0 Z: o5 G0 tGroup D: 13: p% K! E% P, Z: F' _( b9 {0 X, H
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Round 1& E9 j/ ]0 N# u. j: s; f
Group A vs Group B
2 Q1 R  _& c( t* P如A and B一樣, 即較輕一粒在Group C or D
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$ W$ G# O* V& B) B$ l, v1 f- vRound 2
4 Y% w$ O9 N! s8 s% v再在Group C拆成:
+ R* `% }1 O$ @4 r0 RGroup Ca: 9,10. ?8 _1 Z8 [# x' q' n8 @$ k
Group Cb: 11,12
% c# z% r3 f# o4 b然後再秤, 如一樣, 即13為較輕一粒.
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4 ^( _. @! b* E' Z4 x4 T0 x+ F$ a8 H如不同, 即較輕一組有一粒較輕波子在其中, & H9 J8 @6 B# g5 f; g& L2 r% K
要再秤, Round 3, 之後便知答案.' Q/ [; M5 y* i' C- H8 q

. `: O! }2 }0 de.g. #1 假設10為較輕的一粒! X# V; l. }2 ?$ H0 z+ {
Round 1
0 M1 T$ F: ^2 u( J6 I1,2,3,4 vs 5,6,7,8 = equal
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Round 2
0 f  R8 S; |, n( `& E$ j9,10 vs 11,12 = 9,10 < 11,127 g8 T1 r& Q6 F# O
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Round 3
% m2 ^  ~, B- F7 t9 B9 vs 10 = 9 > 109 R  H1 G2 }8 e
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The answer is 10.8 V  m. K6 x% r# L% }6 x# U  z" }

0 o# \& u+ y+ t9 f0 E+ ne.g. #2 假設7為較輕的一粒
% U8 Z( i  F6 n, d* c( a1 WRound 13 |' r' x, o& Y( [" p" N, s: F% Q
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8! C3 C/ j$ @4 o" I5 E
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Round 2
0 G/ M1 o3 U' R5,6 vs 7,8 = 5,6 > 7,8
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Round 3
$ D/ x) g( v$ ?$ f7 vs 8 = 7 < 8
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( v6 p, g, \- aThe answer is 7.* H! h7 c6 U0 z. ]& k0 ~2 \
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e.g. #3 假設13為較輕的一粒0 I" ?5 @8 Q' B  B
Round 1
% n& T4 K+ X1 P1,2,3,4 vs 5,6,7,8 = equal
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Round 2
: @# {; F* v9 p0 X: O  @' f7 `9,10 vs 11,12 = equal
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! J9 j$ j( L0 TNo Round 3
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The answer is 13.. {& \( [$ a3 S- k; l

8 `7 k) r1 ^4 H  ~" S唔知我答得正唔正確呢?!
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# q" H& [( U6 f. Y: N  ^0 {8 J[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:7 I# t: E" g" a1 d" x# W
1.
" ]+ w# M" t; ?: y, H. T1-6 vs 7-12
) z+ o+ B1 T  N/ P5 }0 Nif 1-6 = 7-12     13 is fake
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7 x3 a$ @0 D7 X3 y) fif not
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3 o; g! C: \$ k; f9 L0 K* uWeight the 2 time : H7 z8 a6 s0 ]
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Suppose 1-6> 7-124 C( _* {/ _/ u" z
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1-3 vs 4-6 : G6 {( j& x3 [) l

% g% `; [0 y2 Z) `  S6 nThen Weight the Third% V5 ]' h# I4 U( k  }
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4 `" p0 K+ k. x& pSuppose 4-6 > 1-3/ F4 S2 W/ T8 w2 S) V

, o, w4 P3 m. ?- m6 Q2 w0 s* K1 YJust like the first Step
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( c# b! W5 O: j& ]: n' I9 L4 vs 5 6 F% M4 w. s3 N. E2 b, g

) ~5 e& c% M: ?9 qif 4=5 6 is the fake one
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" E# b3 a0 N! Y. X" Kif 4>5  4 is the fake one . V* ^- v; A& s1 A6 K2 v% [6 J
and so on......................

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& ]  f4 r* r5 g( `問題第二步
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Weight 1:  1-6> 7-122 W. {" S: s; d, P, y
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-64 c! s0 i0 C( J

1 e; X% D6 M9 }% Q$ e2 R0 e$ K你第三步点去搵 7-12 边一粒???
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5 G2 e6 {, z9 o6 h/ z========================================
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2 `2 n/ w/ H5 ^. z  p, o5 |* P5 M問題第三步+ r! ~+ e' O$ W3 O* A
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Weight 1:  1-6> 7-12
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- P! R0 [! G, yWeight 2:  4-6 > 1-3 ; H2 F+ ^  Q4 G' P0 f( k
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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