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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* h: {6 r7 m& o5 y2 D『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)。
7 F' f9 D6 N" p* t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？』0 }0 v0 a$ v: G' ^

8 m* {! x. ~+ b注意: 0 p" Y& J  I5 X+ e5 \

' X! ]6 ^  S" f6 t3 n8 e: H0 L1. 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: y( f, [/ Y* T* n8 a
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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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9 ]/ L1 V6 r0 U* C$ R" f[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:; x# W. O" }. R3 E
相信e條題目都有吾少人玩...

$ [4 V6 ?% v3 _- M6 D4 l0 x我以前畫左個chart去答,
) X  \! @& R$ K7 W; g% m等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
1 D* w0 b4 Q' k; `/ O! F13.........
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3 D# ]% n9 X7 S! Y0 L! K% R+ P) E[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:' I" O# z. O5 q, A/ Y

; Z# y2 Y4 o; y/ v. M: F4 B我以前畫左個chart去答,
- J; f% E! H  Q, z! R! Y等我搵下...

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& R: X( y4 l) \" `3 D* |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:* i% \; y5 Z; E1 Q: s
唔識隱藏...已經諗到..

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sor !!!....e加改左3 |7 ^7 q; J$ h8 E4 G) A
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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. O% D" l' C, x9 T9 z; p" a" S( p

: Z! ]5 N  {8 h) k[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
( h, F* Z/ t( N( i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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& v" X( T+ k2 n$ y0 D7 M' \9 Q
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9 h0 K1 z: z% f0 v2 M6 nPlayPlay, 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. `, M9 T) Q4 Y
if 1-6 = 7-12     13 is fake! y: o, N/ D. t9 o2 j6 r0 M
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if not , W9 t( z6 z3 Y! u

& A, }7 z( `8 T; \: @8 p6 @, |Weight the 2 time
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0 c2 d: k) q/ `/ h% U7 uSuppose 1-6> 7-12
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$ S  E2 c. R, L6 p; o0 |& H1-3 vs 4-6 ! S3 w5 Z4 |! T3 V
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step) P' G, j8 A# q

, R9 v, x2 p5 e* N4 vs 5
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if 4=5 6 is the fake one
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* Z- a0 X/ _; B# yif 4>5  4 is the fake one
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4 w" k" ~. h: ~and so on......................

hello1997

分3組4隻波子秤
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! q$ n$ o6 h1 b9 ^0 [Group A: 1,2,3,43 S( p) ~$ w- e0 T# m- E
Group B: 5,6,7,8+ ]- B. \. M: m0 c& U" d, l- P( V/ \, R
Group C: 9,10,11,12+ K! j, K3 b3 w
Group D: 133 y8 T, w0 m% m" P8 r* o

% C3 z* u) ^% A# N7 y9 FRound 1
& O6 C, F* _8 q3 J, vGroup A vs Group B
0 `, Z, A5 u  U3 ]- v' y- c; ~如A and B一樣, 即較輕一粒在Group C or D$ ^+ b$ J& C/ F3 \4 |
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Round 2# T" W8 J" b5 J  m  u) V- V- n
再在Group C拆成:/ ]0 Z2 l" m! e1 M& |) s2 n/ G) l
Group Ca: 9,10
0 x' S  v2 O9 m, [: ?Group Cb: 11,128 a& {5 k' J# p+ t+ _
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,
, ], u4 C0 a. }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3 p9 [) R+ F7 ]0 f% `8 j
Round 1
) ?) g7 Q! W6 i/ q1 R1 {1,2,3,4 vs 5,6,7,8 = equal
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7 V) ~* i6 r% f, _; ~) I( j) URound 2, P# x2 \0 ~5 q! E" G9 {3 o
9,10 vs 11,12 = 9,10 < 11,12
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Round 3" M) E) c, t0 G9 z
9 vs 10 = 9 > 10
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The answer is 10.: |( E- O4 v, h# v+ t; \$ j# T  m

8 K# M  R+ |2 I5 B# ge.g. #2 假設7為較輕的一粒3 E/ t2 p5 Q. @/ }) Q# B7 e+ [
Round 1: _+ ?7 w! q; o6 Y
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" f7 v# `  v8 W6 M' k; k) L' @
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Round 28 q; U$ d% G, T# f2 h' D' e, i; v
5,6 vs 7,8 = 5,6 > 7,8
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  G& ?" u: h1 \: u, pRound 3
) ^  Q# b# A( S  K2 K7 vs 8 = 7 < 86 S+ R( @$ \4 f" q" q! {2 U+ z

* ?" ]* C9 k6 Z- n; i* [& N7 LThe answer is 7.
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% x3 h: L6 s' n( `5 R+ `e.g. #3 假設13為較輕的一粒
3 R" T) b! M) [" l, ?' S: U* ~) \Round 1
) z' e3 E. W9 W# ]% F1,2,3,4 vs 5,6,7,8 = equal
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( t- ]6 x( R7 A* _1 m4 I6 TRound 2# [" D# O; I0 q0 Y
9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.) [  k& }# ^8 f0 x( W
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唔知我答得正唔正確呢?! . v% J! @( N6 g( l

# t( F9 n" W1 n; W4 x0 h- y/ R0 B5 s[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:# t) v# L5 P1 l" V
1.
! C! o' q- j7 z6 }0 Y  l) r) A! v, X1-6 vs 7-12
( J# D% O! B3 f& z3 |if 1-6 = 7-12     13 is fake
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- T1 d7 N# _5 b8 ~if not
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& I9 z  k  V; Y) E$ E6 G; `Weight the 2 time ( g( B: x8 i2 E3 J& M7 A7 c
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Suppose 1-6> 7-12
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1-3 vs 4-6 8 O9 g) J' Y) r- V) e2 a/ s
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Then Weight the Third
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Suppose 4-6 > 1-3
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& |- v8 I, ~/ K  _! KJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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+ }7 l5 M( ]  @if 4>5  4 is the fake one $ R: K- Y- K" x0 g5 ?9 g
and so on......................

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4 r, i3 B1 Y0 d問題第二步# s, }* t( {6 |- q4 w
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Weight 1:  1-6> 7-12! W3 ^0 s, D3 u7 q
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6" g' B1 W: l% d6 x, a% Q3 }4 |

. |- E  }5 k/ d你第三步点去搵 7-12 边一粒???' R% w5 n8 w0 w) D/ |" ^

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問題第三步( |/ }- K! |5 @8 l

8 O' l+ Q& c8 l& \Weight 1:  1-6> 7-12: m  L; i' G7 o6 q6 ]
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Weight 2:  4-6 > 1-3
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& ^* [  d/ T) X7 |: V$ J8 q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