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)。
2 q, C# @+ r7 i/ E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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注意: , s+ Y8 J. J) G& q4 G

( P" o3 w" ^. d$ {/ c2 T6 g/ F1. 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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4 N* E# d  \+ t# E; S, s2 N2. 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:- j7 Y* i6 y" `: l7 J1 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 p# S& G. t/ i4 ]0 S9 u* M等我搵下仲在吾在" n  A  t) t( Y1 J5 p
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當日用左37分鐘答１２粒波子，差７分鐘才合格。" b, e' \1 W, k* @6 A8 Y& o
13.........$ g9 ~* ]# r: _% Z( M

1 I' [" w3 o' G, r6 a! S6 h[ 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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  \+ [$ G7 i7 H% g我以前畫左個chart去答,# E: c' a0 R% j' q
等我搵下...

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2 [6 o0 S1 b) O9 @4 S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:
% f: \7 a* \0 u9 B5 n# _/ p唔識隱藏...已經諗到..

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sor !!!....e加改左( b) }! r; j7 A1 ]
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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- t2 ^  T, ]9 o

% H0 m2 r  t4 F' d) y9 l3 D[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
. e  m3 J3 |" i& j# ^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.& f& [6 L1 H. e  [

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playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:2 Z/ W; X2 `' Y7 z) I
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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# C" k# T6 C+ Q/ G( QThanks

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6 [$ L( Y* q+ O5 J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: a4 D$ o4 O0 b! o$ }
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-129 B4 D3 n' T$ Z& j8 K" Y3 ~
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1-3 vs 4-6
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Then Weight the Third
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8 u; c0 \% ^; c7 k/ uSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one 5 D' |; V$ @: Q  ?- Q% N; g" L: \
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if 4>5  4 is the fake one - `, L! j* d. ?- B2 j

% O! _6 H/ x4 N5 Nand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
( M$ U6 R3 Y% r) oGroup B: 5,6,7,8% n- f: I( q4 F: i
Group C: 9,10,11,123 R% N5 a/ [( L' N) N! n
Group D: 13
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Round 1
1 `" c* v# |0 D0 ?/ ]! s3 eGroup A vs Group B* y4 E& S* V5 Z7 Y" v# P
如A and B一樣, 即較輕一粒在Group C or D
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Round 2& b+ q- Y# d% @
再在Group C拆成:
+ J* n: A5 b' k# m) b; [Group Ca: 9,10
' Y- V1 G6 K# EGroup Cb: 11,12, q6 n# c# P6 V/ ]) m
然後再秤, 如一樣, 即13為較輕一粒.' F- y3 ?  h$ F' @- z! c

. S6 z- G& e' ?% B3 i, u6 c$ t- k如不同, 即較輕一組有一粒較輕波子在其中,
# `' z# S" W/ u5 Q要再秤, Round 3, 之後便知答案.
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6 A* W. P! s$ c/ {7 w8 X% q# k: ?e.g. #1 假設10為較輕的一粒
" D4 H  Q5 f' w% U9 ERound 14 j% j# P# F+ D- g# \
1,2,3,4 vs 5,6,7,8 = equal+ g- k  z0 |. `* U" h0 @% `$ I
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Round 2
8 V2 r% l+ A- }$ ]- q2 l9,10 vs 11,12 = 9,10 < 11,121 F, w8 F0 `$ X# w4 R# I. ]) l5 E0 K

6 D0 S- L! y# XRound 31 O9 I0 a: u" K
9 vs 10 = 9 > 104 d& n6 i, n8 ]6 Z
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The answer is 10.
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& I2 f( F! @( P& _  U2 Ke.g. #2 假設7為較輕的一粒
2 E! G2 q1 l8 ^' s* aRound 15 U+ x( I% b5 k
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8% D; {. K" m3 Q' u+ k; I
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Round 20 k* [/ _& v! B5 N1 D0 u- C8 a
5,6 vs 7,8 = 5,6 > 7,8" p$ T/ x/ F7 n2 a: `- T4 q
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Round 3
5 p8 s/ l, e' D  @9 {& [7 vs 8 = 7 < 8% E! a9 o. v0 }
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The answer is 7." X& e0 m* {* A( w; |* s8 F3 m  \* F

, h7 b$ m  B8 Ue.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
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No Round 3# q  v5 Q! O' m# h7 r& j' r

9 q# c+ x7 I4 sThe answer is 13.
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唔知我答得正唔正確呢?! 0 p$ D1 v* T8 s5 E& `4 T

8 }+ j' u$ f' e[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:- M8 V7 m6 S6 ^, ]" b
1.
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if not
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Weight the 2 time
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Suppose 1-6> 7-12* N5 C, t5 ~; ]0 i( Z* D/ }
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1-3 vs 4-6 - t+ H% a  c" G/ f
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Then Weight the Third
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$ B( }4 `# j- U9 C  HSuppose 4-6 > 1-30 J8 Q0 R( k+ y  ]5 u
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Just like the first Step
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4 vs 5 6 h7 z' u. e8 a, `( r. s- h% k% \: V/ M
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if 4=5 6 is the fake one 5 X& F4 H" q* Z, r
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if 4>5  4 is the fake one
& s& }0 u, G& land so on......................

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問題第二步
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+ z0 T0 \2 D) }8 v% mWeight 1:  1-6> 7-12' W: x( ^) b. E0 s/ C3 |! a  \1 c
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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/ b2 g5 G6 x2 v. z" S  {你第三步点去搵 7-12 边一粒???
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: N& ]* l: d9 P: g' l7 Z. \8 d0 T========================================
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- G/ q, Y% R2 p. G8 o問題第三步* S) b5 x% g' @+ N, M7 y

; W& N0 X" i/ F) O5 R& o: CWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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. _* u: d' S( b* A' t& y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