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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『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)。
6 v& |! t# g2 }/ D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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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" \$ x! l7 O2 x7 C
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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9 [7 X# @, I, ~8 W: _* L

/ Z. K0 }- z+ V: ^. r* j5 v[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
4 {2 \* y+ t( r4 o+ Z- }: s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,
! c% K' Y* G: ~& M等我搵下仲在吾在4 q" H( z" c5 k/ M

( E- ^: B) i# [) K# z當日用左37分鐘答１２粒波子，差７分鐘才合格。
, ~! x. U; _9 m' [13.........7 b# Z% L1 Q* V6 G4 h

# ~) R$ R  u6 n0 K: Y. Z[ 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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8 ]: M1 d/ z. V+ P我以前畫左個chart去答,
4 T3 G% S: Q; n8 B7 [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:! C/ M# x/ S8 Q/ B
唔識隱藏...已經諗到..

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sor !!!....e加改左4 E" O/ F! F$ p- I/ A% U
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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$ _8 F$ v: P4 c
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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:
0 W) Z- H- U% D' A: ^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.& R! Y5 S# E5 b2 f3 H
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Thanks

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." c4 d5 d% T& S
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Thanks

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2 m5 g  ^: d8 p$ g# O9 E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- f" ?' d1 w) A! g
if 1-6 = 7-12     13 is fake
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6 L$ B% F# n1 G2 o! ^# n! \Weight the 2 time 3 R' s- k9 n; P' C% v
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Suppose 1-6> 7-12( M8 [* g# _3 `1 @7 `  w1 d
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1-3 vs 4-6
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0 |9 K' U% C7 n$ @1 n; ?. yThen Weight the Third
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Suppose 4-6 > 1-32 Y2 o6 Q) e8 Y/ J/ V& D1 [
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Just like the first Step, x% j) ?) ?% S- C" k( v3 G/ M

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if 4=5 6 is the fake one
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9 s0 h7 f( L3 _if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤/ e/ C" i# z5 p; D! T5 S
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Group A: 1,2,3,4& [8 q: b: {3 M7 x2 M! a+ x) T
Group B: 5,6,7,8
) V% N4 E/ E/ tGroup C: 9,10,11,12  I: a7 s2 B4 {0 n  y* l
Group D: 131 D% m$ E3 d8 q  n
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Round 1. z6 V; ~/ ?; B' q9 a( ~5 [
Group A vs Group B
2 m  M5 u5 G7 g4 h% q9 y% {如A and B一樣, 即較輕一粒在Group C or D
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Round 2
* U; i: X/ I, W1 x; q再在Group C拆成:
& D4 H/ u. E7 \. s) K1 QGroup Ca: 9,10' `' s' T- e. \1 i( i) V& {* I1 C3 O
Group Cb: 11,12
& i+ C1 P; P" j8 M9 G然後再秤, 如一樣, 即13為較輕一粒.8 x, N" B% [) J6 O* p2 J
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如不同, 即較輕一組有一粒較輕波子在其中, 0 \. _9 v# H0 W# w) D6 S7 L
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/ U; Q+ Z" s) C# U
Round 1( u' o+ W2 D$ p& i% r! h* V. q
1,2,3,4 vs 5,6,7,8 = equal
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Round 2; V5 E7 C7 h" L  Z( `' M; a7 f
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
  U3 w& S* v2 f9 vs 10 = 9 > 102 T- Z. L! J* ?- q
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The answer is 10.
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$ a' m6 U! s# \3 ?, ^+ O# T0 Ue.g. #2 假設7為較輕的一粒  W+ T5 @/ D( T+ p
Round 1% ~; p& h: K, g0 h
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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/ L6 Z5 X) N: _  kRound 2
% {9 M4 z: h8 H. u: l8 j5,6 vs 7,8 = 5,6 > 7,8
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4 Z9 V* C8 _0 tRound 3
' ^# v/ _. C7 a9 I1 K, ~7 vs 8 = 7 < 86 a- t+ j9 ?3 r7 @9 U6 F8 \

3 Y2 |, U6 F0 e: e- `, FThe answer is 7.
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e.g. #3 假設13為較輕的一粒
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& u2 P; A/ @" x- l1,2,3,4 vs 5,6,7,8 = equal3 k- `, P% }5 J% }2 u

* s" u' n- c. Z& J. F9 U: NRound 2
" v# `$ X9 T, C; U) u! v9,10 vs 11,12 = equal1 k3 x- Q; n! k# c
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No Round 3
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  U  Z% @2 u; ?( K% \The answer is 13.
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- s0 |  M* N# W% a$ z" ^- d" j唔知我答得正唔正確呢?! 2 Y* {. Q$ H3 A' e2 m0 R3 f

  @  ]% I0 k* U$ [[ 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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. R* l7 f4 k$ o' t. h1-6 vs 7-12
$ M, \- I$ r+ _, ?6 P8 ~$ ~: O( |if 1-6 = 7-12     13 is fake; r( w" ~( d+ f: S

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Weight the 2 time * _- a4 J- B7 Q, o0 h% _/ ]
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Suppose 1-6> 7-12
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1-3 vs 4-6 0 _: o0 O$ n# ]. x  U
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Then Weight the Third
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Suppose 4-6 > 1-3
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' {5 |( ~+ a/ t( s8 }' RJust like the first Step
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* [' R0 S* |5 X$ i* k4 vs 5
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5 o& a3 h" E* Jif 4=5 6 is the fake one 6 I( r& o) o/ p
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if 4>5  4 is the fake one
; x- W4 k, \  L' V' ?and so on......................

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問題第二步/ b5 g+ u. U# N: W( G2 v& h

, e) `, F0 v3 S: G: x1 a# q: x/ a5 ~Weight 1:  1-6> 7-12  S7 X2 E, g1 O

+ R# S" ~, m8 a0 o! `Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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. P) B/ w! M9 J+ u6 R9 b你第三步点去搵 7-12 边一粒???( X' D- _& Z9 A

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/ D7 [+ B+ s2 q% S; s. v問題第三步% c+ z% I# D( m, o* q, W

0 n7 y4 e; W" A: w7 c& NWeight 1:  1-6> 7-12, J: X4 w7 P0 p* c# n" {$ u
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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