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 `$ i# S) r9 _$ S『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- y$ p/ E! N# ]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？』) \) M% K' y4 M" h8 m  J' P# a5 p
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注意: ! H. Y/ x6 a1 ^+ G7 C* v( o

" q2 |  w, T1 c" S, K; `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. @8 C3 N+ t  Z! G; K7 l# V: w6 F

  d( O) J. X' y1 J$ e, ~  u2 q- L4 ]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: n- y7 m! f1 H6 F& h, P
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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 21:34:7 [+ R  v% {0 ?1 X8 H
相信e條題目都有吾少人玩...

, i$ u; o- k+ H* r0 m我以前畫左個chart去答,  v% l$ R3 ?  j
等我搵下仲在吾在
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; e* z: X+ I+ i4 d3 q9 {8 R! ^當日用左37分鐘答１２粒波子，差７分鐘才合格。: K) k2 J9 F9 k' N: I
13.........
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& r, @+ D; `8 J0 S4 j5 c[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:5 L; I0 b( S  U! B1 p) B; l
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我以前畫左個chart去答,
& a$ c) T4 o" B0 c等我搵下...

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4 H8 b0 {% y) w: A9 j" B' P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:! |  J" }1 P9 [* A- B. }
唔識隱藏...已經諗到..

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sor !!!....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
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3 P/ Q. \# u, N$ U[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
/ C; m% w$ V6 X0 S  e* C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.
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# Q7 ^- `* c3 ~& G( W% a# `Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  c- Q/ N! E2 S) ?
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.8 V/ ?0 w6 t0 e8 B( c- {' _) K( \* v& n
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Thanks

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( |  E( }7 {7 z- ?# S* g不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
9 e4 Y* ^; B! y7 r1-6 vs 7-12$ H1 D  _, n7 u/ @/ X- |- k
if 1-6 = 7-12     13 is fake2 S& p+ C4 _. e- n- b9 T

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9 A$ Z5 H0 }* x5 |Weight the 2 time : w, _8 g% u8 }( I
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Suppose 1-6> 7-12
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1-3 vs 4-6 8 j* g( K' g, x. g* W0 {  f

% Q1 n4 Q# J, W3 GThen Weight the Third
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Suppose 4-6 > 1-3. Z+ S& U+ `6 {" y9 m! I
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Just like the first Step) D$ L4 |" k- F# P* F5 q

/ W% _6 I0 d% Y5 N0 _4 vs 5
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* p, m. E3 z# s) e- v- @1 uif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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+ d  A$ U! J5 R' {: i% x6 y1 h& M, w2 Mand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
/ k' m4 s6 c0 V; i9 @- AGroup B: 5,6,7,8
% X% |( W& |0 U. F; O. W& ?8 _Group C: 9,10,11,12
7 ]- P- u( y1 @5 ]( y" F6 k2 e* yGroup D: 13
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1 d2 Q9 y! C/ P3 M! p- s6 q8 {! ]Round 15 N' b( u% r+ U$ V8 y
Group A vs Group B
7 C3 h2 P& t' g6 A如A and B一樣, 即較輕一粒在Group C or D( U3 ^: m+ q  L3 f. a0 T5 r6 h3 f

( ?$ h5 r  X7 j3 q3 R- @* gRound 2- n' ~/ F' ~% p4 l) @
再在Group C拆成:/ D% R! ~' G! O& W( u
Group Ca: 9,10
: k" P+ _8 [; b$ C' d% eGroup Cb: 11,124 p3 j4 U3 M* e
然後再秤, 如一樣, 即13為較輕一粒.3 C0 q( q9 A& E1 m4 w
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如不同, 即較輕一組有一粒較輕波子在其中,
- I0 a0 w$ V- o( r4 J* `' S& ?要再秤, Round 3, 之後便知答案.1 B+ G) k- Y& C$ q/ q% b
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e.g. #1 假設10為較輕的一粒0 D8 G9 M) v$ C" ~# m6 H
Round 1" I, i4 Z4 d( C4 J6 G& E
1,2,3,4 vs 5,6,7,8 = equal
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" ^' \+ X5 P, e. g6 m" sRound 2
, h. r2 j6 r4 Z9 O9,10 vs 11,12 = 9,10 < 11,129 D4 a2 {0 d' Z( c8 p$ k( \

1 J$ a0 n; O% l" U" P2 pRound 3
, ~- o6 ]& f$ [- R, J% E9 vs 10 = 9 > 10) Y( I9 B1 a3 a# K; k+ ^

  c* u) w9 |+ H+ ?" ~) w3 J- W) RThe answer is 10.6 K4 P8 m/ ^) A9 R8 r2 `4 Y4 Y

: |8 s5 M+ Q( a5 M7 b* \e.g. #2 假設7為較輕的一粒
1 ?# x* H7 v4 x6 f9 xRound 1% @' q5 _/ ]* o7 K7 o! ^
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,81 _7 _4 h* |1 T) h$ l
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Round 24 e, o, ]4 h: |9 t3 M, Q
5,6 vs 7,8 = 5,6 > 7,8. e& @! h$ V8 v) L7 o% \  M" s

) a9 m# N) z+ H0 v2 ORound 3& n# p. _4 |  b/ ^" v; |' i/ {
7 vs 8 = 7 < 8, N2 y' y% b' ~/ I

0 ^  ]% s- P) Z- w; jThe answer is 7.& W' X: v" u8 q; u

, O3 A+ o" C+ u- ze.g. #3 假設13為較輕的一粒7 C7 K6 P- w2 X! _, ^3 Z. C1 L
Round 1' y% l6 F6 Z0 ^6 z- V
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
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" O  F2 V4 j# kNo Round 3$ d2 G& X  T; b

5 v' C  v7 M0 HThe answer is 13.. z/ E7 G9 f  O* C8 L, U/ F

$ E' A( w( {2 g6 R7 @7 g, 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:
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1-6 vs 7-123 Y- U4 j% d7 x
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12( \( Y2 g9 r9 n: u1 i

6 s5 ?3 m2 f# M. L" a7 Q: z1-3 vs 4-6
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Then Weight the Third) R% ^# m( `% H$ X/ m
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% K% P) K6 ?  u6 r5 Z. pSuppose 4-6 > 1-3
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6 E5 c4 p$ X: K! AJust like the first Step% @  C% v% p8 J) I  O+ h

! C. W, C5 c* G7 y* s! I, V4 |4 vs 5
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if 4=5 6 is the fake one ; X" [: o9 ]! ^# n. k4 `4 ^* Y6 W
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if 4>5  4 is the fake one 4 V0 ]1 f" F$ i7 K/ c
and so on......................

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! O$ q4 L" ?) D0 Y3 \0 M0 \. M問題第二步
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Weight 1:  1-6> 7-12, x( ]7 G/ n+ v
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6' E5 L2 K% P* o* G% @
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你第三步点去搵 7-12 边一粒???
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========================================
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. G6 Z  ?  v, Y. j. G; T問題第三步! @9 m1 u  z* n6 i; }

! U' F: i) e7 j% i7 [9 GWeight 1:  1-6> 7-12" @- Q9 q2 w. ?% n: w. C, Z" S3 b0 `
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Weight 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