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' i) f! i5 E' ^' t4 M
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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)。
& F) R: ^1 E; ]6 g) {& 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？』* G* f4 n; @! K6 I6 }& E6 a
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注意: + H  d+ r8 \) K* P8 P
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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. @; {- ]- f( S  Q( m$ f

& N1 A3 E7 K5 S  l2. 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5 Q0 p1 R$ l3 K  j4 c. G4 b

% X0 M/ F- T% J0 O# @/ K' r[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
% E9 [- q0 Q# w# J/ z相信e條題目都有吾少人玩...

. v* H0 E& C& v4 y我以前畫左個chart去答,! {9 Z' c9 W; I* ]# p: b
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。
& b/ T- k' S# w/ }4 e; e13.........
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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:8 C2 I- F9 ]5 B+ |9 X( r* M

( i; V0 ~3 l9 @我以前畫左個chart去答,, y. R; Z5 `" s6 u
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:
! w" f/ ~" D! a) m唔識隱藏...已經諗到..

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" c- I. ?3 Q/ x, L0 A6 vsor !!!....e加改左$ c9 l8 B3 [: x  y3 \5 P+ n
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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& \# `6 J, K3 O! h6 ]' W; M

4 F8 X( b8 I- [  O; c$ K# M9 ]- G[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:6 X# F) Z7 h3 l
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.1 S% y9 `$ W7 E4 s/ `

3 X" K' C2 }! `# r# H: u% o3 wThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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& K+ U+ Q$ y! _3 H3 X4 SPlayPlay, Let me know later who has the right answer and I will add points accordingly.2 T- }9 t4 @. K- v5 r% w8 s

# U2 ]( e2 H+ e) M1 P8 r: e/ MThanks

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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.
3 d9 h) d3 w1 W2 U/ j$ I+ X1-6 vs 7-12% \# j! y9 X4 Q$ P0 g( |
if 1-6 = 7-12     13 is fake8 C8 Y5 ]; I$ y9 r( L

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Weight the 2 time 2 n, S0 t* t5 _4 d

4 G6 _% z$ e4 y: l. L( B6 w  M$ W/ xSuppose 1-6> 7-12
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1-3 vs 4-6
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+ x2 i4 I0 t6 k3 `% K+ ZThen Weight the Third: ^  k( a, g0 }
3.
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; O. H6 O" {0 \Suppose 4-6 > 1-3; F( b+ L) e5 X) J6 E

6 R7 I; j; S8 `5 f4 AJust like the first Step
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4 vs 5   K' E1 R- |4 [! l% p/ K

( L# o" t. _. T6 j( c, Lif 4=5 6 is the fake one ; \( b* N% J  x, F, u5 `

* S; m- J. _- vif 4>5  4 is the fake one " H5 `" e/ D  M7 j1 s' i
& }4 H- h7 M2 ]% P# Y( u1 r/ ?
and so on......................

hello1997

分3組4隻波子秤- N" e6 B! K" F
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Group A: 1,2,3,4
/ R* V: e* w! mGroup B: 5,6,7,8
5 G% U+ O$ ]  ?" z2 w6 U, |: {Group C: 9,10,11,12
# S- p" R0 |: P" EGroup D: 13
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0 s* ]! R( h" Q0 JRound 19 ~6 k: r8 D% j2 K6 a6 v
Group A vs Group B
8 q% s. H9 I: x  s  D5 U7 q如A and B一樣, 即較輕一粒在Group C or D  _% E  n. `; h  p9 M( o1 B
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Round 2+ o7 ]2 n8 X  c0 g3 U' O
再在Group C拆成:* i" A) [/ \- @& h: I2 G. C
Group Ca: 9,10
3 j, _6 y4 i4 C+ r& `Group Cb: 11,12
1 S8 T# q% A4 E1 L然後再秤, 如一樣, 即13為較輕一粒.+ z8 z5 j% Z- u
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如不同, 即較輕一組有一粒較輕波子在其中, ! a6 Q, h7 F# E# s; y8 P* U
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒  }' P2 F5 c3 J) F' b  u
Round 1& l+ m8 Q. f& q% U5 Y
1,2,3,4 vs 5,6,7,8 = equal
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& F" T, x9 L' G6 [# h" y$ N: uRound 2
) i! f2 M/ V4 k# B+ `* G9,10 vs 11,12 = 9,10 < 11,128 c4 \5 x9 `; }( L8 F' W
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Round 3
* C0 e4 x9 z3 G0 @- F; p9 vs 10 = 9 > 10
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5 z& B  A2 u. W/ m6 d1 y4 dThe answer is 10./ s: ]% t) [9 u9 _! {$ m) J

. @; S- r/ S$ {/ E) @e.g. #2 假設7為較輕的一粒
: ~& z1 z/ U# v( Z6 qRound 1
5 r( ]( i2 }& m/ Z$ e' T1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" [% z- j. r2 l# e: ]) z* O+ Y6 _

) X9 u9 H& ?4 aRound 2) I7 @2 Y+ j  V: s% V; N
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
$ N# I* G8 j5 O  q7 vs 8 = 7 < 8
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* C6 o$ A: v! F/ yThe answer is 7.7 M4 e& b: s% m0 O8 h, p

( K& q, ~1 L9 F& ]/ p- r& V) he.g. #3 假設13為較輕的一粒2 n+ {: [# l7 y. ]5 i4 v; b
Round 17 Z+ @' @7 U/ Q) y
1,2,3,4 vs 5,6,7,8 = equal
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* L0 @3 s8 F; L, gRound 2
" i: A# o) F& o, E0 ~( G& W9,10 vs 11,12 = equal
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0 d% r, t* r  e7 hNo Round 3
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8 w. V' w* k3 T! rThe answer is 13.
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唔知我答得正唔正確呢?!
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, Z$ {- p7 a! [( s/ P[ 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" g. x2 q5 _0 V6 G
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1-6 vs 7-12
% F4 r/ \, x" k# Rif 1-6 = 7-12     13 is fake
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if not   O/ a5 l: a) n8 g5 Q9 ]
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Weight the 2 time
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Suppose 1-6> 7-12/ m* u% k4 l, c# C
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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) k; J7 R6 N( N+ z( t5 z) ?
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Just like the first Step7 `! ?/ q. p! k) y7 L

, T. Q! `& W9 R" g+ r! Q$ M4 vs 5
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9 c" i; o1 n; }* ?; p( Kif 4=5 6 is the fake one
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if 4>5  4 is the fake one ( n* k' X0 k; f# U) S- ]& e; I
and so on......................

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6 u5 W4 Y. W9 T  n8 t0 Q問題第二步
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Weight 1:  1-6> 7-12, `" M, w2 z/ }
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) [6 x# @3 C+ Q* y9 v

7 x- w; x5 ]. b% s; t: W7 v你第三步点去搵 7-12 边一粒???
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$ B. \5 F3 U2 t$ \' D% Y0 G問題第三步* @- o' F2 k, _& \1 `

7 W1 m. K) H7 V1 u/ p: [8 k' H) t! uWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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: c! V+ W" g0 `( c" K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