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! v9 A8 z7 d$ @. R8 p; B7 c% @

; u. |/ v/ V7 ^% A+ l2 T『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)。& h! {8 n) h2 |/ R* 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？』
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注意:
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- h% [5 H5 E! o& Y, R1. 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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$ N2 E/ {9 f4 A: r0 }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; X4 g- ^" w- J0 e: j; H
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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 21:34:3 d6 Q" ]: C+ F2 P$ [
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,$ D% x: Z0 v& S- E
等我搵下仲在吾在
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" n* V3 Q" }' [當日用左37分鐘答１２粒波子，差７分鐘才合格。+ k4 z, N; \) J. q6 o/ Q
13.........
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. B1 f% O- Z  I# v0 O# B# W[ 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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2 a2 ?0 R: p; J5 G/ u1 \" e' }我以前畫左個chart去答,. L/ t. N4 n# ^' t6 ^/ @8 y
等我搵下...

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- C# o: c: X2 b( [, P4 ~( 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:% r  ^6 }4 d% \3 _0 |4 d( `- ^# V
唔識隱藏...已經諗到..

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  a. h& n1 O2 e1 B8 [) usor !!!....e加改左1 J& v' N+ y& m( y2 e

$ s" J6 c% f- K% G* z2. 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) S5 C) n( c2 `5 a+ E

+ X" C0 ^0 K% 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:
; ]1 Z# @; A2 V; l1 k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.$ B1 |6 T# r, y/ `2 ]

* ^: E. Y. y6 K, s/ N8 VThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:( g" A9 T- {' x$ e- M
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* z, _7 L* M/ T. c  L0 dPlayPlay, 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 7-122 I% M3 l5 y$ ~/ f4 T
if 1-6 = 7-12     13 is fake" c& w  Y# Q5 C) P7 F7 Q3 `3 y+ P

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Weight the 2 time 1 ?6 w0 ^- m% r% v/ b0 W% _. @

. ]- ]3 z3 J# f2 vSuppose 1-6> 7-12
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1-3 vs 4-6 - v  [2 U; u8 h# p! x2 C  r: m
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Then Weight the Third
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% D8 H# p' h! A2 U% m: l1 \* D4 sSuppose 4-6 > 1-3: @' @! r0 }, ], v7 [3 h! ]
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Just 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 d. w+ d  j$ z& @. P6 Sif 4>5  4 is the fake one
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' [3 D' I* ^1 d3 Q7 f* Qand so on......................

hello1997

分3組4隻波子秤! h& Z. N6 U5 W) r

# U# U% z1 I- y' vGroup A: 1,2,3,4
, S6 u8 i3 w8 V3 ^( s; u% _: V' vGroup B: 5,6,7,84 o( S$ K/ [9 K- ~
Group C: 9,10,11,12; G) V- c. C, x3 F! p3 d/ @5 E: t$ p
Group D: 13$ V1 d$ m2 I9 a6 j2 y, L& ~
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Round 1
( r+ R+ K' |! y% |1 ^Group A vs Group B2 \4 C9 A  S' W$ W; V1 _" o. q
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
6 e/ `0 O- \: p0 i, D再在Group C拆成:6 ~  c- L# X9 R* H0 p
Group Ca: 9,10
$ U2 z( J' _* o. M6 c9 {Group Cb: 11,12/ M9 L: y7 p1 Z& l9 ?
然後再秤, 如一樣, 即13為較輕一粒.8 W1 L0 u2 P. M

! _) G0 |; C3 I" {如不同, 即較輕一組有一粒較輕波子在其中, " O; n9 i7 t( ]- W) g$ S
要再秤, Round 3, 之後便知答案.& W" M4 ^* s; W  @6 n, Q: t

# ^, Y  ?' M* p  P- ?e.g. #1 假設10為較輕的一粒% F# G0 s/ h) H. Z$ W8 z
Round 1
  T1 }" b$ M0 m, k$ F6 a& l1,2,3,4 vs 5,6,7,8 = equal+ i& X% \! J# D" E0 O/ B
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Round 2
& I7 V! C0 A5 w9,10 vs 11,12 = 9,10 < 11,12! K: k( H9 U- h7 Q4 z

# l; L& V, Z5 ?& G3 p& ^2 r9 H) ZRound 3
$ U3 y, v" f' n% U# m/ h9 vs 10 = 9 > 10; P5 W* K- ~( j5 A  X

) O, @: ~) F7 J9 O) cThe answer is 10.6 k! C7 M- a* e' q% d- h0 ~
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e.g. #2 假設7為較輕的一粒. W+ S, c* d( i7 D% a
Round 11 x  z8 d3 y! o$ U; O& R4 o2 g
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ T3 T# F' _* q' c3 KRound 2# C: m, ^# w1 C
5,6 vs 7,8 = 5,6 > 7,88 \( ~) g* W2 j6 F+ L

6 F. ?) Y3 a& \2 CRound 3
6 N$ c2 \( x2 O9 I7 {) s7 vs 8 = 7 < 8
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3 k5 N0 k2 x% RThe answer is 7.: a0 ?$ `2 _; m. U1 R

( Q0 S' g, I' v# n1 A7 C6 We.g. #3 假設13為較輕的一粒
3 s8 Y3 v$ h0 _5 W2 e; I8 \Round 1
% L+ K; X+ f8 t1,2,3,4 vs 5,6,7,8 = equal4 O7 a8 v. n8 T
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Round 2
3 |4 R5 ]# h/ A  A' H1 S: N2 T9,10 vs 11,12 = equal1 f* p1 Y3 x. o$ M
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No Round 3
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" i+ ?, c: |! h" H% B/ ^The answer is 13.& O" Z* R7 [: A- w

4 X! \- M  ^: H唔知我答得正唔正確呢?! 4 T; v! r) K1 [$ e' `  b

& b) @4 _3 w/ j/ W% w[ 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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$ h+ L1 K' w! {8 p$ f7 E1-6 vs 7-12/ L0 |. r" f  q3 o7 G) y
if 1-6 = 7-12     13 is fake1 P& R1 I+ ~; u8 W
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if not
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) `3 O+ {6 V' |Weight the 2 time
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' B+ N/ I9 o! |; z9 qSuppose 1-6> 7-12
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5 G  E# F/ \4 f. H8 c& t) t  u$ H1-3 vs 4-6
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Then Weight the Third
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& d) @& J5 D+ c/ p% FSuppose 4-6 > 1-3; e7 P0 P% {3 Q  D1 {

9 C5 j' S- C, l6 ~Just like the first Step
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! [% C0 l8 l( e5 ~% `4 vs 5 8 T& R6 g' @% [! F4 R
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if 4=5 6 is the fake one
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4 e+ @* \$ I2 t3 `. a2 Kif 4>5  4 is the fake one
! V2 t( F2 m' q( ]0 Vand so on......................

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問題第二步
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6 o- N6 f& Y  t. ~Weight 1:  1-6> 7-12
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) z/ s! r  R$ u% MWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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/ K9 g" y/ E/ x========================================
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& Q2 T9 y- i; n. v: q問題第三步2 d6 T& Y) V' L( U$ o" W9 C  n8 E
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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/ {. g6 R1 M; u3 I% I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