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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+ @9 W2 N7 Q4 K6 U! 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)。2 p/ h9 r1 k3 P" U
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？』' k" L6 |" N8 D8 E: y4 g6 y3 j4 r/ I. v

0 `8 S: d: W6 p' K. U; l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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" G/ C9 j. ]+ R. @; a3 C2 H% F& r2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
% v# q# K+ I! T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,7 m4 Y9 h1 C; l( ~& l" x) s
等我搵下仲在吾在) z, M" ~/ `2 }5 |( G
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
$ z; P+ i4 l8 J13.........' f6 ~" Y4 N" q/ e/ }" g

4 \" [1 M5 Y) A0 S( `[ 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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5 n! D" V! m" k- S) U0 l8 R我以前畫左個chart去答,9 F5 @" g+ x* R
等我搵下...

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7 s+ ]6 ^9 Q- w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:. u2 r9 V: a1 X
唔識隱藏...已經諗到..

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sor !!!....e加改左0 o7 A  P1 g9 R
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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
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0 n, U5 }2 u" p7 W* M: D[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
; s" p5 y& h! J7 N  B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:4 B- [1 v( J4 Z# n' I
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.. z- I/ f9 Q5 a( p" U4 ]7 ]7 X% u
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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.
+ v4 z" l' n8 o1-6 vs 7-12( F6 B2 k5 K9 v, j0 e2 o5 U
if 1-6 = 7-12     13 is fake2 q1 w  V& H) |: K: t7 h  R9 b

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; b* U% n9 x& P% l! T* R. @Weight the 2 time - C; p3 n/ ~5 a' T/ I/ u" B
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Suppose 1-6> 7-12
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1-3 vs 4-6 8 l+ }, [' Y" e. m: y

- x$ J' ]6 n' D! m0 J1 o; rThen Weight the Third
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/ {/ ~' D8 z% L" k; M# q' LSuppose 4-6 > 1-3. F( @  _# \2 i" H# x; ^% g

# U  ^5 j7 j3 D* P: U8 j* [& vJust like the first Step
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4 vs 5 6 t/ w$ @* p4 n' @2 s" V3 J
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if 4=5 6 is the fake one
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  q7 g; }1 x) a6 jif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤+ ~' q2 r* f$ a0 H$ c

+ o& G2 ]) w% |, l8 E, c6 I! RGroup A: 1,2,3,4
- h$ e) Z9 P) Z* g' C7 I& j% ]" mGroup B: 5,6,7,8
7 U4 A8 i  P5 c! R& o8 s7 nGroup C: 9,10,11,121 i4 B2 v5 E5 x" Q+ H
Group D: 13
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8 B6 V, X! ]8 x+ A& a- qRound 1# W, B5 l2 E7 h# ~$ |$ n2 y0 E
Group A vs Group B
1 p( R6 g/ `: p8 d. v: s如A and B一樣, 即較輕一粒在Group C or D" V2 M1 }* }3 n: E3 C: ]

0 N: M! p" f# Q2 p, [. T2 [) E% dRound 2
2 X- e( l# H- d( I0 \再在Group C拆成:
2 C* K, `  h, ?2 gGroup Ca: 9,10
9 D0 e' c/ q1 @$ AGroup Cb: 11,12" y% w, ~* N/ A% a  l) Z5 b
然後再秤, 如一樣, 即13為較輕一粒.5 q- U# @9 V/ o& A* V
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如不同, 即較輕一組有一粒較輕波子在其中, $ {& T, q8 ~; q6 ]/ f7 l& u
要再秤, Round 3, 之後便知答案.( [" H2 t4 \4 V# E5 {  ?

$ T" v0 [9 D+ ]) o( s+ ce.g. #1 假設10為較輕的一粒
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+ R" T9 F$ N  y, ^" Y  I1,2,3,4 vs 5,6,7,8 = equal
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Round 2
1 ?( I# i2 g: X* Q1 G1 p9,10 vs 11,12 = 9,10 < 11,12
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Round 3
! `% K+ `  B( ]  @3 `) G$ D9 vs 10 = 9 > 10
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% S& L, f( H- @6 j% ?The answer is 10.
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e.g. #2 假設7為較輕的一粒' S" M0 G0 N1 f5 J' Y
Round 1
! q8 h8 j3 S+ O5 X% b1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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" K! D/ d, \$ r9 k" {Round 2; V( C6 Q, s' A4 w. c
5,6 vs 7,8 = 5,6 > 7,81 h+ K/ |; D, N) W/ p* o, R

( a" K) @# L  M# VRound 33 w6 t& H- D) [0 V3 |
7 vs 8 = 7 < 8# j# x0 A) c4 }! `8 a' ]9 M. j

$ b. o. |9 \1 c) U7 ?The answer is 7.
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e.g. #3 假設13為較輕的一粒
/ r) c" `! @# X8 |. P& Q% N9 ^Round 1- w. G8 H: f4 L" C
1,2,3,4 vs 5,6,7,8 = equal) O' X" p  `# C5 |

* x  o) y7 K# q6 x, w) s* ~9 b+ JRound 2: Y9 l, z) P# p; K9 K& Q
9,10 vs 11,12 = equal) }9 J! I0 O8 X- [
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No Round 3( e1 f- b8 P* w, V1 i+ S! t

3 X8 H/ n! j* I* S2 ~: R* rThe answer is 13.
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$ q) j# x0 \& d8 C, u$ E唔知我答得正唔正確呢?! " z3 N7 s1 B* |$ }. A  B, M: o
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[ 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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' ^$ w/ f# S* ~* m6 p3 n! ?1-6 vs 7-12- B: {% ~8 [; c  G2 a
if 1-6 = 7-12     13 is fake
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: k$ W  x' {, W% M% X: iif not 6 a& I4 H$ p" ?" S
  r( a7 @. q9 ~  Z8 f4 i2 g5 R
Weight the 2 time % s6 n" b/ @% s; r1 g0 j# j
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Suppose 1-6> 7-12- B7 `1 _5 ^; J6 g, @" R  P

7 Q* i5 h6 U* g, D3 I$ n1-3 vs 4-6 6 j! r7 s, I. @

* R) S) E  ^4 v+ f9 d, u9 _3 k7 d4 IThen Weight the Third
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Suppose 4-6 > 1-3, f$ ~6 O% W7 v1 O

8 ^) _0 h6 z' \, W1 u9 R- L3 L' UJust like the first Step( r5 r# y5 Q0 L. p7 M4 S

1 V* m# H. R+ Z, z0 E5 Y' ?' G4 vs 5
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$ K) M6 _% q; O% ]5 c7 `if 4=5 6 is the fake one
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/ r( H+ C5 E4 Q7 p  B' {: w0 Z, Oif 4>5  4 is the fake one : r3 n  S( n4 j% _( N, G
and so on......................

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問題第二步) [5 q' K) i1 ^

' q+ `% i/ p) y4 Q) F' ZWeight 1:  1-6> 7-12+ O" `! I; D& z% O6 X$ S1 U) T+ ]
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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. C! i; L6 B6 C* V你第三步点去搵 7-12 边一粒???
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問題第三步  X4 D; k( s8 u# R4 N7 j; P

- x' B, k- q- D6 L. ]Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 * w/ L$ g0 d  I" D! j7 W3 e
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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