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2 l; a* X8 I* T: S* b. z, E. F
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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)。
5 y; G- |$ n, U6 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？』
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% U7 q/ Y# Q6 X9 ?1 a注意: 9 _$ y9 E+ T5 c* t2 @
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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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' G" c7 l: h$ s2 ^! T2. 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 a* W& J& L  i- Q

! J. M! K, M5 f/ Q/ b: m[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 H" y# H$ }( V# S+ \, R" x相信e條題目都有吾少人玩...

5 n6 ?; i( o0 D( p我以前畫左個chart去答,
7 \6 g2 c! u( t6 u$ A4 A$ u等我搵下仲在吾在
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, A  X( W% v/ X; \5 j- t當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ A3 k8 a  c# E9 C7 E9 h6 a13.........
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5 m9 L, a* E- T9 T( A0 v! D[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:6 f4 H& `8 N- k# s
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我以前畫左個chart去答,0 k) {! a: r) K1 D3 ^: u7 m# K$ J
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:, C, c0 ]+ E) y# N& @# d4 I6 L
唔識隱藏...已經諗到..

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9 K8 k% Y' t7 w5 D& csor !!!....e加改左! o$ _, Q: }+ p+ g, D
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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/ |; N/ i9 {4 Y& u7 J7 b
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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:; |* {# X$ u% Y; ~% `4 l
相信e條題目都有吾少人玩...

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9 W! }8 n. z% dPlayPlay, Let me know later who has the right answer and I will add points accordingly.3 ^4 T1 \/ ^4 h1 C$ S: Q
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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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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

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1-6 vs 7-12
/ g  I5 _8 L; ~6 |* J! Y7 o( jif 1-6 = 7-12     13 is fake  z/ ~2 T9 }) j- c1 p5 R

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Weight the 2 time
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Suppose 1-6> 7-126 U" D4 K5 q% O8 ^" H) r
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1-3 vs 4-6
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7 I7 O7 u9 B0 L- w1 K# E" `1 SThen Weight the Third6 I4 L) z5 L# f. M
3.
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Suppose 4-6 > 1-36 `0 O/ w2 M3 h; r8 z
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Just like the first Step/ l% X: p7 W2 f; w* I, |! f
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4 vs 5 ; q. d7 _$ p+ R  O! B& C

- Z8 P% H1 M1 s) i0 q5 t; eif 4=5 6 is the fake one
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9 m! A  |: E1 W6 zif 4>5  4 is the fake one 9 M; K7 w4 q0 M$ Q: ~5 k" _

% M! |( x# a: k9 O, Dand so on......................

hello1997

分3組4隻波子秤
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" f) {9 @& T# Y/ u! C7 K9 p4 {Group A: 1,2,3,4
. y6 G9 f2 i- y4 L9 ?Group B: 5,6,7,8
4 F- l+ G; o* x' `) Z# P, V+ e0 qGroup C: 9,10,11,12
' e) l* ^8 L+ _6 G/ FGroup D: 13, f- h; `7 M9 M/ j' _

% i& o% ^( l- f2 I! f' tRound 1  E: A) m' `! p: A3 G( B! Z: g/ P* t
Group A vs Group B
* ^9 M. x: W  e9 t; U7 n$ c如A and B一樣, 即較輕一粒在Group C or D1 v: C2 n* t( M4 E, u0 R; M8 x

* K  E& B, Y" G6 bRound 2
7 U. j) o1 |: I* h2 p4 [' w再在Group C拆成:
' O* Q, l" i* k, xGroup Ca: 9,107 ?4 A' F  P" |3 D7 ^3 m
Group Cb: 11,128 Y- a1 q4 E- J: s' K( Q$ t
然後再秤, 如一樣, 即13為較輕一粒.
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/ V, X& E7 q5 v如不同, 即較輕一組有一粒較輕波子在其中, % F/ C/ c* I$ m
要再秤, Round 3, 之後便知答案.9 W* B/ \8 r9 L3 f2 u: t

( n; \6 ^9 ~5 x. v7 H. o: qe.g. #1 假設10為較輕的一粒% X6 e9 q! x7 i# U
Round 1
8 }/ h/ S9 T% b* j. c5 Z( g9 u2 {  c1,2,3,4 vs 5,6,7,8 = equal
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/ _- [) Y- j7 J! p& r, j& [Round 2
& T( g3 {& F$ s7 [9,10 vs 11,12 = 9,10 < 11,122 y3 K# k! n/ m0 r% h# H1 V0 h1 I5 \6 f
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Round 3
9 X- Q3 |  W' o; q5 w7 M9 vs 10 = 9 > 10# s  q; A4 ?& ~( i/ J/ V7 f  t' }

# B- K+ y6 V5 F) R: i+ aThe answer is 10.- |, c$ b6 m# J) o

2 n1 l/ t9 d) H$ \  C+ ^e.g. #2 假設7為較輕的一粒
. B" g" o! x9 j" a4 aRound 1
5 d3 _2 j1 c- \6 b: s# H$ ^1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8+ m! e) r4 R2 A0 q8 A2 H

( ^. Z8 K7 b$ @  YRound 21 D( }! R* \' l
5,6 vs 7,8 = 5,6 > 7,8
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Round 38 \; d4 ^1 H$ h$ {; v
7 vs 8 = 7 < 8, f5 l! e* t$ k+ Y2 ~

/ S& U, `. F4 Q: i- B- rThe answer is 7.( h# o( F" t$ B9 j7 g' k6 C
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e.g. #3 假設13為較輕的一粒
5 I# f+ Z" }: JRound 1
/ ^9 W; B* F8 t/ b4 N8 Q+ j; Q' c1,2,3,4 vs 5,6,7,8 = equal
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1 e6 R; o/ s; U9 @! lRound 25 m, y( X) Y1 d" {0 q' F) U
9,10 vs 11,12 = equal3 {8 D4 \& |& \$ K# m5 b0 g1 H( e$ }
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No Round 3, A6 n! V4 F5 l. f% m  I
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The answer is 13.# V, b( l6 {' H& A4 |5 v, ]$ a

9 O$ s+ \. i: p! M( M( T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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8 {, N( z; i7 S! C# Q* z1-6 vs 7-12
' P: H; M+ c2 v* \if 1-6 = 7-12     13 is fake
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if not
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. p0 G+ M0 j8 S2 iWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third1 L1 Y3 z" Q7 C) u
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: P. V1 P; W5 S8 z& CSuppose 4-6 > 1-3
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) ?; s: O( r" f) I8 UJust like the first Step
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8 _' a, p3 h6 }' i8 U4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
  ?7 m  ^, p7 p6 d+ }' cand so on......................

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問題第二步
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  p* M4 r! e& O" `6 ?Weight 1:  1-6> 7-12; L4 h* s& K8 @7 k% k* o7 V5 V

- y+ @+ J9 B. Z0 k4 q2 JWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6: \' ]! y' r% O9 y' h6 Q  k& P

0 F) O' D2 B$ a% E6 ~) ~) _你第三步点去搵 7-12 边一粒???. M. `* P7 a! _& m

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- K& d) L6 [& W- K7 u. t問題第三步  A: i" B; ]3 Y0 B& A+ F9 C$ d" \

6 V9 x! I& R9 }9 q- KWeight 1:  1-6> 7-12
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: l+ s" ^' w" M; o  wWeight 2:  4-6 > 1-3 / W- H3 M- A: N8 t. S$ w
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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