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( z$ o/ H4 G- m4 H% q% i& _

1 y1 R. o5 w# r: }* M『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)。9 a% T' o9 w7 k; d. |" m
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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& w& K" E. C0 }$ Y0 L5 M& w. Z& a! W1 p注意: ; k2 k$ U7 {4 w' F8 D' [, `

6 y) X0 R) t7 j1. 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4 ?6 `5 f; T' L* f! t; ]; z
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:, ~9 s( x5 R$ M5 B: S
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,8 c" u2 O6 E9 e2 n. T# K) h
等我搵下仲在吾在
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+ n! x8 X0 F& c7 c. F當日用左37分鐘答１２粒波子，差７分鐘才合格。
  H% E8 A7 r1 c6 z- Z( B13.........
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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:$ w6 k1 ]" k, q

% c" \% S6 C& x* {6 [1 x. Q我以前畫左個chart去答,
- ]! Y, e: G  _( D" ^' Q等我搵下...

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6 R/ b  s% K+ s- h5 {9 q' L0 h' L" c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:
2 ~% V2 L* r: e& ]0 a唔識隱藏...已經諗到..

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* S9 v) s0 v( G- {) G6 csor !!!....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. C8 t. Q2 d! l
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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:9 E4 L2 U1 D9 S: n# _- a
相信e條題目都有吾少人玩...

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  G5 R' `0 N( ^& o6 vPlayPlay, Let me know later who has the right answer and I will add points accordingly./ o# P+ S7 b3 W- m# n

; {$ Q9 z' \; CThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- |& P# |9 a# I7 ]
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.' w$ D+ w) F, O/ A

& w4 E8 e- w2 D# q( [Thanks

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, s: a" o' t* `/ j+ x: B5 c不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.5 W% m) a9 S" j( _9 K, N+ a( O' E
1-6 vs 7-12% u, ^9 W" G; ~% n5 ~
if 1-6 = 7-12     13 is fake' B+ l5 v6 R4 B' O+ m
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if not   A- H$ C' d& i: B/ V; r4 A3 C
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Weight the 2 time ' k; P$ d+ p( {; _
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Suppose 1-6> 7-12& c4 h: k" ?; ?! B% L1 x# B, A

4 o2 `) y3 e. k6 e/ s1-3 vs 4-6
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4 u% ]$ w% p+ `; H" EThen Weight the Third- P0 W) {/ w5 Q# M% v
3.. C& U8 i& S3 L7 a

; J; l/ w8 i1 SSuppose 4-6 > 1-3
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* d" {6 [/ X/ z" G# A% TJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one 3 K2 E: {5 W3 \% d# b0 r3 c

. s. v2 k" k5 e; Y0 ?if 4>5  4 is the fake one , b4 H/ }7 w% P! x' f! W/ \& |: `  x% ?

+ b& D( B3 D" F4 g0 Oand so on......................

hello1997

分3組4隻波子秤1 w3 c) V9 X4 V, _+ \3 F

& S" w3 }: Y1 c& E# R  yGroup A: 1,2,3,4
% H$ l4 ^( p% }* ~3 G) F# h! XGroup B: 5,6,7,8" o# A. G2 X. P" Y
Group C: 9,10,11,127 P6 G$ q- P4 R7 T
Group D: 13- V1 V5 U# {9 ?7 ]* b& h

) Y( P5 S; p, s8 m# gRound 1
* ~# y4 G. a2 D- D; q7 V/ _) nGroup A vs Group B
* I8 s1 q8 X) I如A and B一樣, 即較輕一粒在Group C or D% _; l6 }, X! w9 _# \
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Round 26 E) g/ y" q6 A6 [
再在Group C拆成:1 _0 R" r  ~5 [# J. P7 o( x
Group Ca: 9,10
. D; G2 X7 q+ j+ z+ M6 Y3 GGroup Cb: 11,12+ q/ N( Y# R: b% e
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, 1 j" O$ w- H3 N. D( C$ n
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+ v" A* p6 r/ K$ {3 D
Round 12 q" Q) y7 H8 X7 f  t0 N
1,2,3,4 vs 5,6,7,8 = equal
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Round 2) {0 Y6 R( O  K) R
9,10 vs 11,12 = 9,10 < 11,127 @+ \* G5 r( z2 T8 r! |
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Round 31 B1 I* x/ S1 F5 a3 b! N- V7 ?' |* y
9 vs 10 = 9 > 10
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The answer is 10.3 n. X/ A: ~/ C- ]3 @/ M& H

3 n0 }  r6 w" G  |1 N& n8 Xe.g. #2 假設7為較輕的一粒
9 [8 z$ @7 d& b4 {7 Y: V. V' {& F& ARound 18 F0 d% \! s( B; h" Z9 U) T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
$ n% p& N7 o; Z7 J+ J4 D5,6 vs 7,8 = 5,6 > 7,88 \3 R# H& C/ S5 k7 _* M% m" {
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Round 3- l( _' Z6 G7 h5 \# ~
7 vs 8 = 7 < 82 I$ C: G( V- ~
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The answer is 7.
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9 N6 R# v3 G, z$ ee.g. #3 假設13為較輕的一粒+ y, d& g5 Z6 ?
Round 1
4 L  {( b0 a: c! D1,2,3,4 vs 5,6,7,8 = equal
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& E3 G, I) K/ ~& _1 MRound 2
  G3 F8 F) d0 v# c. y9,10 vs 11,12 = equal/ A) ]- [$ J9 A3 z# o4 ?( B4 E

. R3 J7 n" r! s0 M  YNo Round 37 `! U! u' D& H4 e+ O, @
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The answer is 13.
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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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7 \4 E1 p8 E9 o( U& G; w( t, b1-6 vs 7-12
& k5 i4 c1 ?- kif 1-6 = 7-12     13 is fake
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if not 6 S6 X- A% w. i5 u* {: Z

+ B  u) N; U% PWeight the 2 time 5 Z, U4 |3 I5 s

6 B/ m! T' n6 k6 B' H: oSuppose 1-6> 7-125 `9 L9 H/ _* I+ T8 ]

8 Z, A3 C$ ?# o  @& t3 F; M; Y3 j1-3 vs 4-6 8 T" C3 I* y2 R& d: d9 @

$ y! X2 m2 b5 ]* e" b9 o& ^Then Weight the Third4 W4 Z/ h$ }% c9 j/ r' l' K& @. g0 b
3.; F8 Q: I- ]4 k

0 L! u  q0 Y) gSuppose 4-6 > 1-34 E- n( v: _( \3 ~( N( Q
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Just like the first Step# _5 F/ `/ Q+ C
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4 vs 5 6 M: m. G) g. j7 ]4 o0 ]

; |: m- j. {5 G- uif 4=5 6 is the fake one 6 H9 _, d  T2 x* Y- Z. ?+ i
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if 4>5  4 is the fake one / g* W) ]* X0 m+ a3 ^
and so on......................

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問題第二步
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- R8 F# \( ]# w5 {Weight 1:  1-6> 7-12: A3 q; I' ^3 T$ k
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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+ o. R: }, y8 W1 M( Q0 a你第三步点去搵 7-12 边一粒???( f8 G% s( S) m- |% @3 r1 e9 W( ]

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  e0 e& A; L, _3 p問題第三步
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) n; L5 i7 M* j2 z" \( W# tWeight 1:  1-6> 7-12
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: N( H' l0 R) r- t- b2 P, ~Weight 2:  4-6 > 1-3
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, h& [1 t5 E6 l$ ]2 \6 H7 J+ @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