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! [8 U. u0 M( X4 b4 U

# R0 S. u% _1 F8 j6 g. T( ~, R『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)。
1 K4 s  w* d9 q" s4 P; P; Z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？』  _' {9 [& L! v

7 f4 n5 l# y( R( F注意:
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; W- v3 m8 t9 N4 T1. 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: O$ j( B: B& 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  , hide 字要連埋 , 內容 = 答案* C5 p5 a% G- J) k7 a) W4 F
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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:& _6 p, g0 V. @4 r
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," T& q2 t) {3 V  e
等我搵下仲在吾在
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% M1 L& m1 d# q5 E0 w' l當日用左37分鐘答１２粒波子，差７分鐘才合格。
% F# c; k9 }5 F* f& U13.........
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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:+ h/ a) N" H' H9 o

; x! e7 W1 d, [( f" p我以前畫左個chart去答,
7 B* f! V7 @4 ~, ]0 m1 a" t等我搵下...

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; N6 M/ e: i1 U) t) _7 o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 T7 s6 }( V% o( Q& \( R- h4 l: C唔識隱藏...已經諗到..

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sor !!!....e加改左
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8 r1 Q$ `7 y) i7 ]+ V6 O2. 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/ @7 e9 U2 q, y) p3 {

9 X+ v! R1 T, x2 y3 E' t[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
$ V- d' }- P  V相信e條題目都有吾少人玩...

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" B1 H, s. O3 c$ APlayPlay, Let me know later who has the right answer and I will add points accordingly.
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5 n) d! Y- @/ k. O4 eThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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- f2 r4 y6 _7 J. lPlayPlay, 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
1 R# `) C4 I4 Vif 1-6 = 7-12     13 is fake
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, V5 @5 e8 s2 l1 Sif not 3 i& l% C0 c2 u

$ F+ ~4 R, _) r3 X; u3 h4 N# w" \Weight the 2 time ( O: `' [; Z" e% F
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Suppose 1-6> 7-12
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5 n2 X; h. E" W: U$ \1 _1-3 vs 4-6
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' }# l3 ~' Q3 ?; J0 gThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one ' q, z+ Z  V+ m  o/ B

+ n. A7 v5 X6 X, y% E( I: l6 T: ?- o  Eif 4>5  4 is the fake one
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- x' O9 D6 o4 c- s0 i* aand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4) X9 [3 R! a$ N1 K
Group B: 5,6,7,8/ a/ p# _& I; v: S0 O+ g2 e
Group C: 9,10,11,12# _" ~5 v. ~/ k$ N0 [
Group D: 13+ I( L' r( a/ s. L9 a2 k
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Round 1
2 g9 i5 d$ l; r( M1 k6 _Group A vs Group B# l) H8 S& K# u- E
如A and B一樣, 即較輕一粒在Group C or D
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8 ^9 t3 j! A! I0 A: p, V( }Round 2& {& R5 B( t! |" j
再在Group C拆成:
6 [: W: E/ _% j+ ^9 hGroup Ca: 9,10
  l1 r+ |; j0 o8 A1 ^; jGroup Cb: 11,12
! h9 o5 w$ a( _' w然後再秤, 如一樣, 即13為較輕一粒.7 i+ O2 E$ U4 e( d& V5 Q' Y
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如不同, 即較輕一組有一粒較輕波子在其中,
4 K4 {# R; q2 t0 r要再秤, Round 3, 之後便知答案.4 n6 C) W" V5 s+ C7 l6 t! A

, {- ^3 d9 f( L( K- oe.g. #1 假設10為較輕的一粒& E& _" t9 E# o- z0 j9 a# K8 u- R
Round 1
" W1 H5 `3 ]1 k8 }5 E. A1,2,3,4 vs 5,6,7,8 = equal
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Round 2" e9 U3 n. w! Q9 H5 d
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
  a* G/ y9 n3 m" X1 E% d0 |9 vs 10 = 9 > 10( x4 `0 o" z9 ]1 E8 d" \8 r

, |- G; Q5 H, m7 H% NThe answer is 10.
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9 k* ]' S1 V3 B3 @1 C* le.g. #2 假設7為較輕的一粒6 S3 ?7 M: L, g5 c$ j# {
Round 1
2 P7 j5 m6 x6 B, |" J7 k1 Y1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 21 k1 \) I( n" p1 b2 X
5,6 vs 7,8 = 5,6 > 7,8" m1 K- J) L- ~  t6 c
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Round 3% \" J! D# h! H, S' n8 Z
7 vs 8 = 7 < 87 a, N  V$ X4 h( m+ ~
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The answer is 7.
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e.g. #3 假設13為較輕的一粒% W$ }* i3 w0 U* [
Round 10 c: ]& ~# i0 g* w1 X
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
5 ~$ V4 w9 L9 X' ~9,10 vs 11,12 = equal
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) M* J) Z  V& g9 @9 t8 N# z/ |No Round 3# O0 x  D; ]/ a

5 Q9 ^2 e. O5 T. f+ t8 q% yThe answer is 13.2 }- x+ |& h# V1 J. t- j0 [

2 s/ m! ]1 P3 d9 D3 D, j* [& m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:! J" t' Q; _* d! j! C0 Z& Y/ P
1.
3 N3 e, n  v0 z; X0 {, H6 F1-6 vs 7-12
- K4 Q% a- c+ T3 Mif 1-6 = 7-12     13 is fake. f# P% l( {# p/ F3 P/ _" S
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if not 6 r4 o0 d$ R: W8 D4 j& U

0 `* _5 L* J# h) r: r% FWeight the 2 time   l' B) C7 a, o4 W  u: g
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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 Third
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Suppose 4-6 > 1-3/ s4 _) c) H, [- [4 d

  Z" D( |' d, R% V0 `2 B+ ZJust like the first Step
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  [! ?. T8 l8 }; @9 D6 G% ]' m4 vs 5
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: e4 L  T8 t2 m. ~7 Vif 4=5 6 is the fake one . w$ w% K) g3 A3 A. G/ n
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if 4>5  4 is the fake one $ x3 {( Z" i. [. J- A% [; ]) {
and so on......................

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問題第二步
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. u( h) l! i. N# c3 KWeight 1:  1-6> 7-12+ O' `0 j2 Y8 y; Y( U, N

$ M, W0 Z; L+ W4 z: kWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???# X4 v) Y* z4 R. B6 c: l

# |) O0 r, c' u1 P3 @; Q& h========================================
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: s5 c! C7 f5 H問題第三步
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Weight 1:  1-6> 7-12
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0 y& L2 a/ ^1 H3 |" tWeight 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