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 T5 H2 G) j3 U- R* ^3 n! A2 L0 ?
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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7 |, U5 J9 L. ]5 P, O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
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: l5 L5 f+ Y/ f; r) ]8 S2. 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6 l. j6 c# m4 @& T" m) a( x: r$ O
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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:
, w# W- U7 v: o- T- r相信e條題目都有吾少人玩...

* X* z: l9 D1 p1 q. n我以前畫左個chart去答,% }) m4 Y; z1 v* f- V
等我搵下仲在吾在
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8 c, @6 s* j* G& y0 k當日用左37分鐘答１２粒波子，差７分鐘才合格。
  ~  }* {$ G% `8 }  j) K7 [6 {1 \13.........
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% p/ N! p0 ?( d8 r2 T[ 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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我以前畫左個chart去答,5 w4 g6 w8 v- H' K: P
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:
: K, l; V" g/ l- u( E) V, g3 R唔識隱藏...已經諗到..

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: A! Y5 `! C9 `9 o$ u2 {. |, xsor !!!....e加改左
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$ U2 e. N" @, L! y( X/ B2. 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3 p5 O7 X5 \, R( l, A' M( X. ?9 \
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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:
+ O/ x8 R* c- r2 t8 j/ [相信e條題目都有吾少人玩...

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9 P4 k8 H! g7 M6 W$ A0 P' m2 XPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 R/ ~& c8 x4 v" C  ^
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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3 q+ b% |: t2 i/ T/ G' D' M& t0 HPlayPlay, 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

1.
  j: o# \2 |' n" @1-6 vs 7-12$ z* t: e$ z/ J- ^$ k0 V
if 1-6 = 7-12     13 is fake
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if not # \% H& k8 r, `

# D9 h' ^& G" L6 ?7 gWeight the 2 time
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# [9 F  D7 g" Y- wSuppose 1-6> 7-12
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: m/ ?& P& i5 \4 o  o: L1-3 vs 4-6
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6 u* I* _; V- C: U; }/ GThen Weight the Third
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Suppose 4-6 > 1-3) F0 B. ~5 i: T# q: H% U
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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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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤1 T4 X" N9 y( R& N1 I, S

3 h3 {/ M. E8 P8 q% ]* k# a+ DGroup A: 1,2,3,4
) Y. N) s* |  I9 ^4 W6 I, zGroup B: 5,6,7,8$ M- v) h# I( m8 M" |6 @: U
Group C: 9,10,11,123 \% P. _2 n6 K+ Y
Group D: 13& D' y! D# e( j- N
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Round 18 J, _$ M# V8 [0 m' n% _  |
Group A vs Group B
. a2 u5 K2 K1 M9 T9 _% j) F$ G如A and B一樣, 即較輕一粒在Group C or D. \1 o* |/ n/ H' j; x1 b4 y* d8 }

$ E1 G9 C3 z! YRound 2
0 F% ^: J$ }- Q' g再在Group C拆成:0 I, _5 C% {, _" n7 t
Group Ca: 9,10
8 ~* S7 }$ e+ y0 jGroup Cb: 11,12, h% C" }% ]' N' A
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,
, L+ h1 e/ l  B5 X: `' u/ M要再秤, Round 3, 之後便知答案.
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% I# k* x5 l/ O$ Le.g. #1 假設10為較輕的一粒
9 a1 v6 X' O' n- S3 JRound 16 @% f  D$ A$ \  L+ R* q
1,2,3,4 vs 5,6,7,8 = equal
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- `! N) g9 W& f# ERound 24 N  {; E  l7 [& c& T( Y6 L
9,10 vs 11,12 = 9,10 < 11,12
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) U5 ?) u" C1 T/ {& R9 ?Round 3
: A# _0 K* Y( Q8 g) Z. t0 K9 vs 10 = 9 > 10
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The answer is 10./ k1 ?- v! d" d7 M# G# y# g$ V$ ?4 J+ Z
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e.g. #2 假設7為較輕的一粒
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4 k, k5 A4 k6 t- C# D: e5 [1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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4 c$ \3 M2 K, B( B. h( r) N2 bRound 2' H+ o: y; \/ M/ S7 M$ {
5,6 vs 7,8 = 5,6 > 7,8
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3 a! K6 N+ w" p2 Q# ]Round 3
/ v+ \& C% g/ S  h6 }% I7 vs 8 = 7 < 80 w7 J$ a. ^( L0 L. H5 H7 J6 O$ h( m
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The answer is 7.8 w+ Y; y5 A0 }& t, L; @

) ~8 S1 X/ W: u6 G; O/ be.g. #3 假設13為較輕的一粒/ @0 \* t* [/ o* y$ R" K
Round 1
% m( A& M1 Z% T. t1,2,3,4 vs 5,6,7,8 = equal
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Round 2+ l8 q% O  d0 y) g* F- m: i
9,10 vs 11,12 = equal
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* U% k* }# a( J; B) ANo Round 32 ^+ B. i& l6 p! p& Q3 {

6 n; `3 y; a. {The answer is 13.5 D" {3 s* m; m* ^; H* s

, \/ `' i5 J0 B- ^) n9 ^# Y0 G唔知我答得正唔正確呢?! - `9 K0 G2 P  P

4 v) K  Z& \5 U5 i  d5 }# @& ?. }& V[ 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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4 d' e* G. T6 p1-6 vs 7-121 \" X6 l9 v1 T$ C. a" t
if 1-6 = 7-12     13 is fake
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Weight the 2 time # {$ n% v" ?& R) N( i$ u
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Suppose 1-6> 7-124 o) v' o; o$ o) G: G! _" I/ J
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1-3 vs 4-6 . J9 A5 f/ F3 p0 {2 X( F
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Then Weight the Third
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Suppose 4-6 > 1-33 S4 h6 F: C9 ^' A) z9 x2 p1 t% v

6 {$ [% d1 Y" `Just like the first Step* n, P  x4 j- O+ ~8 v9 D4 T

2 E' C5 k, l( T- b' F& c9 u8 D( U, o* i4 vs 5
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4 M6 L. C$ `4 f: Z2 h8 aif 4=5 6 is the fake one . B3 w9 v; ^" X$ u& \& R
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if 4>5  4 is the fake one 9 R/ L( u! H% S  ^) v' x
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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9 u2 S  s6 d/ ^1 f4 gWeight 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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========================================
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) T# M/ C' L6 Z( ]問題第三步
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/ g0 p0 A& q) G7 p$ M% o3 E* e0 C7 tWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 , a# `- b! I4 t7 K

2 U$ x8 I1 P: ?5 A5 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