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- b) A4 i& m* ~" M: f- Y2 e, R

& h1 k! D! w- y6 o7 \7 v『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)。
$ e0 }- l. A8 G# D# y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: 3 ~& E. }- B' N( d8 i1 D

1 @3 b1 Y4 U4 F; }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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# p2 F' _# F# M7 Q5 E% R2. 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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2 S0 O* h8 z3 E( {  Z5 k9 H[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
8 b  Z1 ?" N$ L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,
; V" ]( E! R. f9 J; j- Z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。! h/ o4 L5 s: F
13.........
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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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) ~' j, r4 J3 P4 B; A  C! v我以前畫左個chart去答,
9 J; [" R- H% m- \& o% D等我搵下...

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) \; o' s2 |1 O  w, S/ Q6 d( B( Q$ w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:- s. t( o6 E1 H9 ^5 l6 B
唔識隱藏...已經諗到..

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sor !!!....e加改左# j8 s, ^; ~& b- r- R0 G( i
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
, U. R1 v* P  l8 ?4 ^6 m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.0 D' a. M7 J3 \+ [7 u
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; ^- @5 y2 I( }# t# S9 U5 @

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; R+ L/ `7 J, GPlayPlay, 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.
/ z# X; ~7 b  E$ {1-6 vs 7-12) D$ ]- O6 ]4 Q
if 1-6 = 7-12     13 is fake; A$ G5 n4 A+ L
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if not
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Weight the 2 time
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Suppose 1-6> 7-126 U' R* b/ M7 h% U' L9 [
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1-3 vs 4-6
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Then Weight the Third
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; y- D0 Z; D% D2 }* e( `! X1 WSuppose 4-6 > 1-3# F( M3 H$ F9 c( L$ I2 E

, x$ e+ Y/ M- X5 n2 KJust like the first Step
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3 l; V( J+ Y0 ]4 `% k, t' p! o* Q4 vs 5
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if 4=5 6 is the fake one : q  M3 |2 ~7 Z  x1 d" |# _

' z3 P# e4 X; e4 Q" R# eif 4>5  4 is the fake one - T0 I7 X; Y4 M+ b( Z0 X+ h
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and so on......................

hello1997

分3組4隻波子秤' z* h$ Q+ h8 M  R7 R

$ N! r" r1 H9 ]$ k. I) GGroup A: 1,2,3,4
( a% Y3 n, u, QGroup B: 5,6,7,8% ~% u7 W! E# C
Group C: 9,10,11,12; E8 q5 p8 H% b/ T0 y9 Q
Group D: 13
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Round 1
% s2 F, g9 W4 v! d) VGroup A vs Group B" |3 h* \+ ?) ~1 a1 f, y4 C. T! T" o
如A and B一樣, 即較輕一粒在Group C or D( n2 C8 g; `0 v" w- |, ]
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Round 2
' z# c3 x0 C+ J" n再在Group C拆成:
# C! p% w6 v9 LGroup Ca: 9,10
* ]/ u; t# o) WGroup Cb: 11,12
" B$ k" i/ h/ A4 Z4 X然後再秤, 如一樣, 即13為較輕一粒.
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2 j) p/ V2 P7 X如不同, 即較輕一組有一粒較輕波子在其中,
8 w# q# N* ~- w2 X: E% V4 ^要再秤, Round 3, 之後便知答案.; n6 g' q$ I' N. I8 v+ G
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e.g. #1 假設10為較輕的一粒, r' e, D# h& P0 t
Round 1
& G  }  g* ]# Q2 y5 m& `3 i: y/ I1,2,3,4 vs 5,6,7,8 = equal# _  F$ q) l; v0 m! I# Q
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Round 2; Z$ V! D" P( {
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
, {: @% U7 o2 e) t( m9 vs 10 = 9 > 10# r, U& F4 i! V0 Y* a9 x2 r

% k7 u+ d! Z( O/ N  OThe answer is 10.6 a# x) P# n! b5 z, e5 C  F

6 s/ f. i0 X& k, }e.g. #2 假設7為較輕的一粒" g' q9 y) `8 r) S) p- O* U
Round 1  J) u$ V; H8 W$ w
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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' Q" k8 u$ ^- B( J9 c0 D3 yRound 2, N! T8 @" x* C. c+ P
5,6 vs 7,8 = 5,6 > 7,8
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: x# d* f- A$ F4 n/ r# YRound 3
$ R+ |9 [( x: @7 vs 8 = 7 < 8' Z) y3 d5 ^- C5 {5 D* w$ C

  s8 T6 M& X& @The answer is 7.
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* u) U+ g8 j# H2 P& Se.g. #3 假設13為較輕的一粒
6 N) i7 H" `3 c% N+ jRound 1! W. p) S: \1 ~0 Y/ x
1,2,3,4 vs 5,6,7,8 = equal9 [1 P6 L5 V3 @' L4 B4 ~) t
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Round 2
. W" W1 F6 Z( ?$ @9,10 vs 11,12 = equal
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No Round 32 A) z( v6 r( s
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The answer is 13.
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% n' [1 e6 @) B唔知我答得正唔正確呢?!
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- G$ ?, J& l5 p, `5 _[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:- ?- r/ t, R. K2 f
1.
( W( o) z5 |0 d! c/ w" D$ t1-6 vs 7-12
0 i0 I& Q- A+ b$ ?) K2 Fif 1-6 = 7-12     13 is fake
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if not
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; v$ E6 u4 O, p+ q) [/ aWeight the 2 time
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5 J- j3 _0 Z3 s- D) \Suppose 1-6> 7-12
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/ ]7 c+ E  a$ h- ]" n& j  D8 ~1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3! y  ]! r7 |9 q" x, l% `% m

3 F: x* {) d% S' j1 ~1 }( A  gJust like the first Step
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% u" ]# Z; o+ r0 ~9 B4 vs 5
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% @# }5 T2 m  c3 v) fif 4=5 6 is the fake one
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% E- y' y* m6 Q3 w$ Jif 4>5  4 is the fake one
- N/ _* H, r: u, H( gand so on......................

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問題第二步
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4 G; q  N: Y2 X8 q/ I2 Y6 BWeight 1:  1-6> 7-128 o/ p0 E2 _! X
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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9 }. [" o# A2 B# q- P  F$ b. T你第三步点去搵 7-12 边一粒???
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========================================
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& a( |5 Z' O/ U) \% w" [( x問題第三步
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" g4 |) k& I0 ^. Q. |8 oWeight 1:  1-6> 7-12( {1 i  v8 p; F: ~; B3 g
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Weight 2:  4-6 > 1-3
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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