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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9 s  c3 f: y  e; Z, O% Y# U1 x『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)。0 v* E2 W2 A! `
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？』' q/ D$ Q$ k" ?& Z
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注意: 1 F' O; g' t9 p0 J
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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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2 q! _5 F4 [( s8 O8 ^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:
2 T! }2 D2 G1 K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,* ^% \6 X0 i) O1 `4 a
等我搵下仲在吾在. G7 V  ]# K3 H9 L
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
% B# y' _8 G4 J0 |5 |9 g0 x13.........$ ~- {6 D' d* I4 i' f

$ u9 p) w( v' ~4 ?6 d6 N[ 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,, [( z; o# x2 g7 c
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:
& K* `  m9 Y0 @1 D7 S唔識隱藏...已經諗到..

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4 ?2 h3 S$ K- x6 b- \7 @* L" ]' Vsor !!!....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) }( f9 X3 B# k2 x7 h; [# A& J2 x

& Y+ |4 ]% B$ H! X" q[ 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 h! U" e8 E3 b; R
相信e條題目都有吾少人玩...

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$ ?* Q0 A/ q+ WPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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6 Y" k5 o0 o9 N4 f9 P% EThanks

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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; X1 }$ U  y/ dThanks

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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

1.
9 a! u7 ]4 u! [7 D1-6 vs 7-12
+ D3 p; y& k) Xif 1-6 = 7-12     13 is fake
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if not
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7 r# G: n3 L" V, D: f: R3 U9 I( [Weight the 2 time , D+ [  H- B+ s8 [, i
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Suppose 1-6> 7-127 |- Q% f& y5 d% n3 A2 r
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1-3 vs 4-6 1 q  ?/ u- f- D5 \

, ~0 [) B# l9 _3 ]0 k3 f/ WThen Weight the Third
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Suppose 4-6 > 1-3
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6 d4 u5 ~3 l7 p7 u2 }! x& ?, J' bJust like the first Step) p. u" k. M* I

8 R2 ]* V7 k) [! r+ ^4 vs 5 ) G$ u8 H1 k) ?: ]' t
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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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and so on......................

hello1997

分3組4隻波子秤
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8 O+ U, f1 ]; Y" [+ f* _Group A: 1,2,3,43 w5 s/ a9 d8 M( G
Group B: 5,6,7,8' b/ R/ c" b, O. K. F+ P3 k0 I5 I+ m
Group C: 9,10,11,12
% G; ~2 n/ T" |: lGroup D: 13; Y! n3 e7 J% ~" x8 |

% _7 L* @; |( h: rRound 16 p( K$ P6 C) z, l  f5 F0 d3 s
Group A vs Group B1 V# x. X% _7 f1 ?2 M
如A and B一樣, 即較輕一粒在Group C or D) p1 }- G( g, c* M3 l. i' W8 D
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Round 2
+ u% P/ e1 @2 L7 z" h% S, V! q再在Group C拆成:
0 b6 W& Q4 m$ s: V7 ?) l: ?) H$ yGroup Ca: 9,106 X( j: I) Y9 I
Group Cb: 11,12
* h+ c3 M; ~' [然後再秤, 如一樣, 即13為較輕一粒.) O* v1 J( ]/ R
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如不同, 即較輕一組有一粒較輕波子在其中,
# V' N7 Y! r# X, E$ n# x5 h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' a9 u7 T4 p# Q0 D8 u$ C$ P% @0 e
Round 1# ^% @* [' d1 ^0 v
1,2,3,4 vs 5,6,7,8 = equal
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- M: x& s: |) b9 c0 n; w. X0 LRound 22 ]  |" c( Y% n; H8 E
9,10 vs 11,12 = 9,10 < 11,12  E0 h! n- e3 A* k
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Round 36 c3 N! F2 L  V$ l. J
9 vs 10 = 9 > 10
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The answer is 10., l$ f$ C4 o6 Q7 u' Z4 a
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e.g. #2 假設7為較輕的一粒
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4 ~& L5 D- {, C* W, W1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ x7 b  x0 `& K3 Y- B% }

7 G2 J3 t5 X3 p$ G8 _4 t9 `Round 2" ]' v! S. L. D) u% F* N3 d
5,6 vs 7,8 = 5,6 > 7,8& z# X9 f+ z6 \" h6 f

( D+ M. h; F' d+ R8 tRound 3  A+ h! z7 @, ~& {& o
7 vs 8 = 7 < 8
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; y; v7 L0 V" v9 L" G1 oThe answer is 7.
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& n- d! @# n+ m$ N9 i3 Oe.g. #3 假設13為較輕的一粒
) x7 B/ y& C, s  M3 T% bRound 1- l6 k, }  a: v3 c
1,2,3,4 vs 5,6,7,8 = equal2 c' p8 R  N. u/ F1 h. r$ e7 m0 g7 z

. {( N/ l* C7 b) D. ~4 D  O8 rRound 2
+ b' q7 K2 A; B3 \: _$ [9,10 vs 11,12 = equal) g  ^2 ~+ B: r0 |0 y* Q8 ~
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No Round 3
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& L3 O7 n# Z! |+ o( J' eThe answer is 13.4 x! n$ x  J* s2 M, {" A3 w/ q

/ q$ C5 d6 o$ C8 V, K唔知我答得正唔正確呢?! / }. ?3 f& e0 z
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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:; x) I# y4 E, {6 h& r& L( G
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1-6 vs 7-124 ^+ V7 w) Q& e1 T  ?% h6 h5 H
if 1-6 = 7-12     13 is fake
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1 z1 O) z+ g7 b6 ?9 z' g0 x2 x  Pif not # f) |3 }/ d, h: Q. d& [

2 ?, O( I2 @! T6 w2 {7 gWeight the 2 time
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+ Z7 c) Y/ ]- s& F8 B4 XSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third  v& ?) N1 y7 N, Q  R) _- Y
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Suppose 4-6 > 1-3
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Just like the first Step  z* f  v* P2 F7 s- W/ T
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4 vs 5
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if 4=5 6 is the fake one 4 P  r+ m) y; }
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if 4>5  4 is the fake one
" m% N& x2 y9 M5 {$ h+ a" W/ wand so on......................

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" |! T2 Z' z- O5 W- i0 U$ Q, b, O0 L問題第二步
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Weight 1:  1-6> 7-12
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: o9 H( V  H1 L" O5 mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-60 }2 k6 J: x3 D; w+ O1 ^1 Y8 d6 T/ G

5 A2 Q. x; U9 M你第三步点去搵 7-12 边一粒???- n: r  u* m1 n( V7 _. X4 y, f

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問題第三步/ `( [8 @0 ?+ g- z. @3 T

4 k& d  L% L- a5 w% \Weight 1:  1-6> 7-12
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, `+ S2 W) v) g4 XWeight 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