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( J- L. a2 Q% e

* E' p( l, X, U" J5 a『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)。
3 e, s8 x# x/ u5 E- F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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8 X7 n1 b' d: U6 ?注意: $ t- }! R/ o4 j8 `" P1 p

7 }- N3 i- G" Q& \" k( x( c7 y" @4 m1. 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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0 _; r# e% E2 P9 c2. 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7 C* ^2 E: d# W. d

* @! a" T: r4 S9 Q9 O[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
& M* d7 r8 s! G0 s相信e條題目都有吾少人玩...

: Q1 W/ h2 k, f5 p我以前畫左個chart去答,0 F* V, B0 n+ f4 I7 z5 k
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。. Y5 {+ ^5 i" W& h4 j' c
13.........3 X' k3 g8 w2 z

/ l$ B$ S# T& B[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 S- i. o& ^/ ^- u! [
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我以前畫左個chart去答,8 q* H1 p' j4 l7 W1 R" [8 ?
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:
9 p- J$ ]' x$ h; H3 c唔識隱藏...已經諗到..

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) K; \6 A& k  S# [5 i. psor !!!....e加改左
5 K$ U4 f# }1 d/ K
" p0 ~5 [: y  J5 u8 D2. 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# v# G. A% }" i- X  U
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
( e( S! [( Y* |! ]) g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:
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( a, j  v) \$ H1 A# x9 E! n7 ~6 a
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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0 \$ F% W. i& WThanks

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1 n8 A4 q( H& Z/ D( Q不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.; i: V% |3 Z2 {2 w# u& O* h( d; |
1-6 vs 7-12
! b3 q- i4 j! M! L! v) Z) Fif 1-6 = 7-12     13 is fake' q. x9 h* @' `# q

1 q, s+ _9 }/ q8 E8 Uif not 6 n, A/ B) N% x. h, V, b2 r
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Weight the 2 time
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Suppose 1-6> 7-12. E+ B+ I" p$ j+ z
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1-3 vs 4-6 - L3 K' x% j4 x8 N# G: r
% a8 J7 h3 z2 {  T1 M
Then Weight the Third) ]3 J, x1 o4 u' I% `! `
3.
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Suppose 4-6 > 1-36 }( c8 i6 D2 P2 ?7 U# }! \

! B( Z. d7 z; O- }6 fJust like the first Step- P8 p9 t+ e, u$ J* g
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4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one ; S* `. d1 i4 K

  F. G/ M) a; }4 R7 _and so on......................

hello1997

分3組4隻波子秤
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! i) |; `1 h# _4 [: f. d3 W3 EGroup A: 1,2,3,48 h* A2 K5 f' a3 b
Group B: 5,6,7,82 f3 l( D# L7 Q2 T: q: Y
Group C: 9,10,11,12
6 {' U3 R1 w, t. pGroup D: 134 p; T, Q/ L+ a: T' }
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Round 1. W0 `" I* T; s7 c+ o  f, Q" }0 N
Group A vs Group B4 T1 l, |4 |5 d$ q* t3 U8 ]' ?
如A and B一樣, 即較輕一粒在Group C or D
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/ k; h( y9 H9 h* K' z$ I/ ^Round 2
4 x0 W3 w4 s, f3 o& @$ }7 K3 W再在Group C拆成:
% I! x( b' ^& CGroup Ca: 9,10! A+ H# E) B9 f3 H
Group Cb: 11,12
3 ~" B1 b. h0 M) \9 F( W然後再秤, 如一樣, 即13為較輕一粒.8 P3 K( _" k# R* C- X; V

  n% v2 Y) {  P, d7 l4 w7 Z如不同, 即較輕一組有一粒較輕波子在其中, ( T& n  o' D/ V( ?$ u' Z- x
要再秤, Round 3, 之後便知答案.; `0 ^% N/ r6 h7 i; Q

8 s+ ^: {4 R6 ^5 {e.g. #1 假設10為較輕的一粒% ]5 ]" g; d, I8 J
Round 1% E5 b! w$ c' x& p
1,2,3,4 vs 5,6,7,8 = equal
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! J0 A" o9 m- [7 s+ c& ERound 2# F8 L; G9 u/ Q7 g$ c% B' Y' e
9,10 vs 11,12 = 9,10 < 11,12
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0 E6 |; K; ^/ @6 [* T! j( X& lRound 3
; X6 p% E  G" X7 r9 vs 10 = 9 > 10
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The answer is 10.
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5 l1 w5 k2 Q" d' L$ re.g. #2 假設7為較輕的一粒9 a8 t9 ]: J9 r2 h( Y4 ~0 Z
Round 1! n) p+ ?4 c! u) P$ j  g, i# Q% l
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 [8 C- N, K6 t6 `
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Round 2: D9 p, s! v8 _" F7 g0 B5 i6 g
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
- C" d9 j& c) ~8 J+ C4 ]1 f: H7 vs 8 = 7 < 8( y6 T  y* b) {/ d2 [

# _) `2 I" I% _# n8 ^The answer is 7.
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6 k2 x7 f" l2 P. ]7 y/ Pe.g. #3 假設13為較輕的一粒3 Z2 Z  @* \$ ]7 p% ~+ c& _% o
Round 1
  i5 R  f+ k* w6 x) P1,2,3,4 vs 5,6,7,8 = equal
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Round 2
& A4 L, g7 x- E4 b* u' \. ?9,10 vs 11,12 = equal+ e% A! Y0 _( {6 ^
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No Round 3- c. e! T" ?. D% T  G

# ~# N0 n  u' s3 N' U. f- oThe answer is 13.
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+ A. N" O' L1 C唔知我答得正唔正確呢?!
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& C$ o: z/ H$ O! T; a$ F4 z[ 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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% g$ i# C1 Y) I- O4 D1-6 vs 7-128 F9 I8 Z- r% l0 |% T" w0 y
if 1-6 = 7-12     13 is fake8 a7 N& W& G: N" v

' X8 e, n! r& N& fif not
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7 j; q" Y* ]; c# Q3 |Weight the 2 time : J' C1 U) y' p, `
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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
2 \  ]% V/ {  ]; s$ e
5 B- v/ x# e( T5 F1 F2 FJust like the first Step( l6 D( T( W1 l) q1 G+ z

- k5 i! B3 ^/ F3 {% U4 vs 5 6 K, W# z$ O# i9 X% G5 y

3 g+ Q* T1 _8 h& n8 m1 F8 iif 4=5 6 is the fake one
4 w* M8 L5 G) x1 _$ ]/ a! g" X# ^4 W, C: T- _1 o
if 4>5  4 is the fake one
. M+ y1 j4 U' p% Xand so on......................

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2 b/ V- u& o6 A# f( `1 N8 F5 g0 U問題第二步
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Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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7 b' ~& Y, A6 N9 u1 o2 _; b你第三步点去搵 7-12 边一粒???$ ^6 s. E( H: }- e

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: u4 k% v& L; G問題第三步; {1 d: [# W# c* Z: P1 l+ A

" i; s: H' A( M" G8 w# x: CWeight 1:  1-6> 7-12' Z4 g0 W! C) ?9 `- D
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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