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)。: e- X* I! m  ^; j( y% k
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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; i  T& Y  i: x) e3 e注意:
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: `8 ]8 f6 `3 G8 _# {: b$ v8 h1. 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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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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) C- e9 [$ v3 c3 M* _[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:4 u& R  L7 N" L. G/ D8 O
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,7 A0 D' Y7 Q1 J, z
等我搵下仲在吾在
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1 g* r3 K5 @2 H* F當日用左37分鐘答１２粒波子，差７分鐘才合格。5 s  ^% D: a: {% h! y& ^: @
13.........- d, m8 s) D/ ^! R
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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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3 Y0 o* i6 |- W我以前畫左個chart去答,- G3 i/ f3 s2 ^: x) E% @: @
等我搵下...

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: b4 L* ]$ ^) f: Q0 N  Q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:
5 c* X2 U& m! \9 A$ t5 ~+ ]唔識隱藏...已經諗到..

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sor !!!....e加改左) t$ T! C7 Z9 w+ l3 a. U
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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2 P" B6 W3 n% Y7 e: _" a0 V5 X% d! R

' A, `4 v2 z" Q. ]' T; 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:0 ]1 i0 ~5 I5 @" U( ^0 F" V
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.6 Y2 Q. ?  S2 K: d
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:/ e0 ^5 k2 t0 q9 A! W; f
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* I. a4 o+ B% M# ^: n; X) ePlayPlay, Let me know later who has the right answer and I will add points accordingly.; w* ?( {7 ?. u( ~& `, {
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Thanks

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3 F; _% l: I/ G* W2 B, b# V不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
3 B( r+ s8 U+ ^$ Q7 f1-6 vs 7-12
- x' u% ~  g! D/ pif 1-6 = 7-12     13 is fake
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if not
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# q$ X9 r* l3 }7 g5 Y5 d7 W3 W0 g& gWeight the 2 time
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3 D1 U& x( N6 a% d$ hSuppose 1-6> 7-129 U* W$ l( P2 K" O* b' l( U8 @

& v9 S9 N4 s; f1-3 vs 4-6 , S9 _) F( q7 ~7 o" A" ~0 E+ w" C% R
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Then Weight the Third
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Suppose 4-6 > 1-3
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7 v2 v  f1 X3 A& LJust like the first Step6 i) ?0 ]% `, k& [

( Q3 F* d( K' ~" o- [! X5 t4 vs 5 2 n  o; J* t4 B; F( b
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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6 E4 r. `( Y* zand so on......................

hello1997

分3組4隻波子秤9 x. u  V$ ?: z6 @

% F! ?8 z: P, f3 [9 v5 w1 uGroup A: 1,2,3,41 ?! x% Y1 ?7 |( t
Group B: 5,6,7,8
$ z* M" t4 k4 g, `$ ?7 [Group C: 9,10,11,12
/ a3 J  o1 y' Z+ I9 L1 vGroup D: 13
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' j3 ]* p- I: Z  A0 U1 }Round 1, r# Z3 G' M, d% \9 a/ Q7 n" W
Group A vs Group B* x9 K! p" D1 o/ Q, U" c
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
, e. F2 t0 [  g( J/ u% @再在Group C拆成:
4 r2 Q; l  T1 @" xGroup Ca: 9,10
) |4 Y- `4 `# S/ z- Z: B' J1 YGroup Cb: 11,12
) x( d' ~) D! M然後再秤, 如一樣, 即13為較輕一粒.( i% [3 }! b9 o
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如不同, 即較輕一組有一粒較輕波子在其中,
7 H: x7 E, k) |$ z要再秤, Round 3, 之後便知答案.4 N, I5 [- O' n

' L1 |. b( w3 k6 g4 i7 m4 D/ \e.g. #1 假設10為較輕的一粒3 [* T8 e8 [7 o8 C! a  _
Round 1
8 i8 b1 [  ]. t. q1 b2 l2 j1,2,3,4 vs 5,6,7,8 = equal
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Round 2! ]! O! g  T3 m6 E; d$ p' W
9,10 vs 11,12 = 9,10 < 11,12- `, d9 J( E* y$ M: k
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Round 3
1 G- ]# O5 x& g& G, ]9 vs 10 = 9 > 10
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  V( N3 |7 }  Z0 fThe answer is 10.4 y0 L0 r$ R6 ^4 @! N4 X8 I; R8 H9 l
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,86 V6 U( L; G1 T6 q) d
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Round 2; X! y8 I$ U& c/ N3 v, R! ?
5,6 vs 7,8 = 5,6 > 7,8
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: q: M6 `' ~0 F8 @  @Round 3" R& w+ l' P+ M, v: p& g) k
7 vs 8 = 7 < 8
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" C0 m' {7 X6 s; P2 DThe answer is 7.* {0 t, D1 D! v* z5 \! K' ^% J
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e.g. #3 假設13為較輕的一粒+ A4 _8 k+ Y7 p( ]# I* i6 O4 T
Round 1% i8 v. U, e. b
1,2,3,4 vs 5,6,7,8 = equal
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- Z* j$ M/ h& v; O1 m5 ^' B" O! WRound 2! ?5 x7 H4 |7 t6 k) K/ U# R
9,10 vs 11,12 = equal# {% |( @8 H. B2 B# |- N+ G

1 L/ e9 d" {* c8 t# ?( C8 {; j# [+ ]No Round 3; t& W) H& k; z2 A& n7 B: l% B3 X

( p0 w' T2 S: h' Q. MThe answer is 13.& S: l9 Y% a2 Z0 F+ O

1 i% v+ h* u5 T; b- h6 |$ g唔知我答得正唔正確呢?! ( e. ~+ u; ^( I4 n% b1 X6 _+ X
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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:/ O3 N1 s% Z; c8 \
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1-6 vs 7-12
( w3 v/ d4 R* o1 d& \9 d' ~5 kif 1-6 = 7-12     13 is fake
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; N3 c+ V5 q2 h1 ^4 ^) CWeight the 2 time
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' \+ T1 z$ x+ R! |- ?  [  ^Suppose 1-6> 7-12
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$ e- C- n. [; O. X4 R# J2 ~" l1-3 vs 4-6
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Then Weight the Third6 a1 M: d1 R% \3 j5 ~
3.
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7 y; A! c; _* d* X6 zSuppose 4-6 > 1-3
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* ?; k3 R# a- u$ i  fJust like the first Step3 S4 X( V7 }9 T0 m$ n- N% n4 O

( k- b0 x! }. O4 Z+ Y% G0 e% @( g* v4 vs 5
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if 4=5 6 is the fake one
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4 H+ l* K0 o, V. |% H/ S; Yif 4>5  4 is the fake one
/ I+ g% h* m( ~' Q5 [/ Pand so on......................

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問題第二步' T% p0 `+ D: D
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Weight 1:  1-6> 7-125 W* _+ }# C8 ?+ i- [0 J% ]
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6# {3 f  B0 }% p) O& t8 z$ t3 g/ F- n
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你第三步点去搵 7-12 边一粒???
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========================================, V5 ~0 v' i- J8 H

1 _; i6 p7 d0 @* U5 ~  j# o問題第三步7 g  i& _. d! ?2 Z1 V+ p; S6 |: `1 l
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Weight 1:  1-6> 7-126 ]+ J2 L, S% h

$ U% O# I9 @9 H' Y/ C: z" _Weight 2:  4-6 > 1-3 6 a$ I5 L5 f* q3 y
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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