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)。
8 t4 Q3 P5 C. m7 v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？』, ]7 a! J$ S6 q) \% p# G
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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8 E) q1 }: v0 j& 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  , hide 字要連埋 , 內容 = 答案
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4 c0 y( J/ k! z+ W& k/ C[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:0 S1 s% B; T9 R7 U
相信e條題目都有吾少人玩...

& ^3 ?" Z( g" h' [  y' S# c  k我以前畫左個chart去答,
; i# t2 @- u! [% c$ a等我搵下仲在吾在4 V% e5 f' W! D% @* b+ d- F5 U
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
& Q. T1 C5 L$ n# Y& ~13.........
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$ o. b6 n. ^5 X% O8 t" T[ 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,
/ i9 }8 b- O$ h* d% X* v等我搵下...

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$ O0 |% t. {' ]* r" i6 W! M" Y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 D7 |  L6 Z& ?2 v+ J唔識隱藏...已經諗到..

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) k8 g. S; N' z8 y; zsor !!!....e加改左
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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$ o) v* s  Y* L6 w, }, V" y9 P* S6 e- ]

. b5 t: C. t6 ]+ r' m. P[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:1 \3 W. R# N1 ^( T
相信e條題目都有吾少人玩...

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0 @) I2 R, b  q. }$ APlayPlay, 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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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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0 S% q7 k, Y2 M2 e) d: K5 nThanks

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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

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1-6 vs 7-12
+ R' w. E" ^$ ]7 [if 1-6 = 7-12     13 is fake
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8 ?2 O% t% o7 aif not 1 G$ Y6 [( e5 I* p1 X

/ P9 W2 w$ A% h- K3 |( Q( UWeight the 2 time
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& w0 w. B1 j$ h0 |Suppose 1-6> 7-12
+ {( L8 d0 q1 E$ j; k2 q0 N3 c- p# ?" B- a
1-3 vs 4-6 2 |  l# M! E/ A; }7 ]

6 Q; J3 C8 n9 q, N: X2 GThen Weight the Third% e' N9 d4 p/ [1 \; N' C
3.
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Suppose 4-6 > 1-32 T3 e1 b/ N5 `& |
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Just like the first Step
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  h0 _3 j9 W) l7 q4 vs 5
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if 4=5 6 is the fake one
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( M7 x- H* @( O; x7 Sif 4>5  4 is the fake one $ k3 g: e+ v3 y

. U5 g# }! c7 I, @and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
/ d% w- n6 m9 o- e+ A& Z6 `Group B: 5,6,7,8( F; R5 g6 ~+ Y8 |+ L& n
Group C: 9,10,11,12
9 o7 c2 H- z& `' uGroup D: 13! M3 d* ~( g. D- P$ ]  I5 O

5 }7 ], B4 V% k* gRound 1
+ P$ G, Z  T- AGroup A vs Group B
9 L' ]# L7 }3 c" |; `0 j如A and B一樣, 即較輕一粒在Group C or D
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4 {8 _  X& u) D  {" Z9 CRound 2
8 e. `( A% {% P$ _% P- s再在Group C拆成:0 H! _, c0 g! ?* G, e6 v! T
Group Ca: 9,10$ Y9 d3 _- o6 T8 H- y4 |+ B
Group Cb: 11,12
4 s: n% N: T' R8 h然後再秤, 如一樣, 即13為較輕一粒.
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% Y, Q! L" c0 l8 |7 A; i4 J0 Y- x如不同, 即較輕一組有一粒較輕波子在其中,
# o+ W2 s4 E5 {+ R% M# s要再秤, Round 3, 之後便知答案.% c4 E+ @3 p1 h. J
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e.g. #1 假設10為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal  n/ O: `" G" K# ~3 l" V' j

: _  q% T" _/ Y" Y1 \% q9 `9 yRound 2+ s/ \( e* ^6 |5 @
9,10 vs 11,12 = 9,10 < 11,12* ~3 R: D1 ~( l/ G# @2 E

( V+ `7 F  F" S1 j, X/ KRound 3
) D- w) R- n# c# O9 vs 10 = 9 > 108 D2 e9 V8 W& B  j

) p6 g3 }9 Y7 t1 [" nThe answer is 10." G/ n4 Z. D: t4 ?% u% C

* Q0 O& `  _# K( ]6 O: be.g. #2 假設7為較輕的一粒
; K$ z; T7 {( T' `! j0 ]; V9 ~1 |Round 1& p( u3 ]8 j) p$ [5 u/ l* W: \3 b
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8# S, O5 v4 r* I8 Q- ~2 {
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Round 2
* o! Z' X; `0 \5,6 vs 7,8 = 5,6 > 7,8
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$ V7 u( k; I/ }5 h  F0 J, l7 tRound 3+ y' S8 c. F. H) R2 b
7 vs 8 = 7 < 84 c% G$ A: x  |; c  b" k

/ L; a: t/ l, K$ D; H- o4 E: L9 n/ yThe answer is 7.# }; k; P  C# }

2 y) n( ?; J( s8 De.g. #3 假設13為較輕的一粒$ z. V9 O: f: v! A/ k
Round 1
& l! R: q) G7 L1,2,3,4 vs 5,6,7,8 = equal( L0 {0 ]. F9 a- n
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Round 2
4 o1 W7 j% V: V3 Y& G6 l$ X" O9,10 vs 11,12 = equal
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5 ]. j) U3 ~3 J; g( Z2 Y- CNo Round 3: X: f) J+ M5 M/ ~  w, k
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The answer is 13.
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, d" U) G. \7 m  D" s8 E* [* z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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6 }1 {' s; L- a& }6 k1-6 vs 7-12
4 c. s" o2 K* P' F2 x4 lif 1-6 = 7-12     13 is fake
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if not
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1 z! F' Y+ \$ S8 ~$ f; z/ dWeight the 2 time
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: X' u9 D$ w, m# A$ C4 HSuppose 1-6> 7-12' z# k* n. Q* P- u! f

' N$ f- q- m- t; Y9 L5 z1-3 vs 4-6
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Then Weight the Third- e% c7 B4 h; k& {
3.
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- H$ K4 O+ f1 e; JSuppose 4-6 > 1-3
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Just like the first Step
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1 ]" S5 }0 Z. a. U  I+ |; R4 vs 5 # D* T& L" _* L- g- N% ]
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if 4=5 6 is the fake one 4 }* {, h' p2 X% Z
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if 4>5  4 is the fake one
! d7 n# x/ v! t+ V- W( v/ tand so on......................

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問題第二步3 M  k1 r1 ^/ w: p/ M9 _( s
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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3 T9 J5 d. }' G, {! \你第三步点去搵 7-12 边一粒???
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8 `0 k- L/ k* S$ z# }, r$ V========================================
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! B, R. M2 Q/ ?% A問題第三步
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4 |$ l. o7 B3 `0 U8 `* }) xWeight 1:  1-6> 7-12. Y1 \0 Y, d6 R' ?3 X

& s3 \7 |/ K7 t" M9 B% f$ sWeight 2:  4-6 > 1-3 0 q* `, @# ^8 E- \
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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