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)。* |# G4 r0 Y- r. Y( j
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？』  |- V2 n# j% J% q' `! f7 L

' k0 H+ [  ?) g注意: + z9 b8 R6 ]) i9 F. o% j
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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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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$ f/ o, q. i1 z0 i9 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:
7 @8 Y$ a' R, n% E; e$ n. C0 l相信e條題目都有吾少人玩...

# d. U. Q* V/ l+ p$ M我以前畫左個chart去答,
4 h2 O/ E# _: P- b, ~等我搵下仲在吾在6 Z, I6 E  H# ^6 |
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當日用左37分鐘答１２粒波子，差７分鐘才合格。9 t9 i; m5 k5 I8 a
13.........
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9 d5 \" I8 p& f[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:  K5 C3 h6 ?$ d  O7 [
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我以前畫左個chart去答,! h7 [' @" M$ _: L/ K  ^
等我搵下...

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7 S; _  ^7 j/ o2 C: T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:
  U% B& ]0 y, k1 m: Z0 C唔識隱藏...已經諗到..

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sor !!!....e加改左% O5 Z, i) L$ T+ X& W$ H# k) Q: G
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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2 |! }# _- u) g$ x

- m- C1 I( a) b. W[ 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 o& ~: p) |  e" k
相信e條題目都有吾少人玩...

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4 d7 E: r" S; `0 L; n9 c# r: {PlayPlay, Let me know later who has the right answer and I will add points accordingly.0 ^/ F6 L7 p* j; j: k
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:! P4 ~' R' o, b. a6 q3 ^
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8 [) c# n; ^$ T+ U; |- {2 D; cPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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$ d, g9 k  h: U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
; C( F& J/ S' L4 Wif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12" G# |  J% a4 R
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1-3 vs 4-6 ( b# r+ D8 ^9 }  W# z

& K4 s- I! I% T  JThen Weight the Third2 ?; @3 _; @$ |9 p7 c& [4 B6 Z9 c
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 6 k1 y2 w4 ?: V

7 |2 V) K6 c5 _3 q( Vif 4=5 6 is the fake one ( a) J& T0 E% R' @

% B2 l3 Z1 }8 v. a# `2 V: k0 k- P$ d$ mif 4>5  4 is the fake one ) h* p+ h, {" O% x+ X, n

7 V' {  C2 m0 Y7 {5 D6 hand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4+ U& e: w1 X) q, J, w7 ]. u: M5 l
Group B: 5,6,7,89 O. ]/ S  S( X$ g( V
Group C: 9,10,11,12
8 J; u  H9 Y6 XGroup D: 13
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Round 1
4 [0 B" C# G, n. v1 F* O8 H8 GGroup A vs Group B3 S4 u  I" a5 j1 |4 Z8 Q# f1 W
如A and B一樣, 即較輕一粒在Group C or D$ }. N1 e7 K$ H

: e1 R* G* _( N" s3 _Round 2' u0 B+ F. M) C' Y3 v0 D
再在Group C拆成:( |* R! S# {! b8 Z' G
Group Ca: 9,10
! g" D( o8 y- U' P+ J* q" c: l9 LGroup Cb: 11,120 I* h- L& e- Q2 i. N) }
然後再秤, 如一樣, 即13為較輕一粒.' t: @: ~/ i2 P& }6 k) j% O
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如不同, 即較輕一組有一粒較輕波子在其中,
1 ^' r" i3 Q" V; H( I$ }要再秤, Round 3, 之後便知答案.8 ?) j& J9 W) e4 j, U2 z4 `* d
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e.g. #1 假設10為較輕的一粒
& z4 V/ {' {2 m& q4 yRound 1
) \* `3 \1 m" T6 Y5 Z1,2,3,4 vs 5,6,7,8 = equal% D* e- @# \7 y. D

4 |6 c2 x6 h9 ORound 2
6 j+ T1 i1 k6 _9 r& ~$ k" I9,10 vs 11,12 = 9,10 < 11,12
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Round 3$ [6 o+ {; @$ B
9 vs 10 = 9 > 10& @2 l" [( u. m2 |5 F! V: B

+ |. j2 C$ [* _! JThe answer is 10./ P. a! x) \' L; r2 O9 S1 R; ]
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e.g. #2 假設7為較輕的一粒* m3 R, _0 D" X0 n$ a" D
Round 1: X- E+ ~' s+ Z' |) }& z( I/ S, \: g) h
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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, b1 J5 a! }' l2 oRound 2& O2 s& s; R% V0 B* t
5,6 vs 7,8 = 5,6 > 7,8
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( ?/ |+ Z% B0 p! D9 GRound 3+ o7 [% Q! G1 z
7 vs 8 = 7 < 8
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( F+ Y2 P' _( L1 U$ T  qThe answer is 7.
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) j  E' \1 e5 s6 c* Z  Ze.g. #3 假設13為較輕的一粒
) |+ Y" x: M  R9 }" GRound 1
/ [3 l4 u( n/ P- p+ b1,2,3,4 vs 5,6,7,8 = equal! C3 m% Y% H" I6 o8 u- _

& V( E: }+ K: o: v+ mRound 2
, W# B# o, Z: Y2 `4 l1 k% z9,10 vs 11,12 = equal" J7 W& f3 v& L

1 I" v. _- q; _& E" [No Round 31 ]$ {. i& B! Z- ], d" F4 Q
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The answer is 13.
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唔知我答得正唔正確呢?! 0 U6 _& t' e! @4 [; K5 k/ ^
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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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1-6 vs 7-12' }* n8 [) e" a$ p3 w
if 1-6 = 7-12     13 is fake
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& W) P4 K' t) O9 q" A5 a1 e5 bif not
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Weight the 2 time
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Suppose 1-6> 7-12# j. [% p6 ?* z) m* V
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1-3 vs 4-6 # o. n: m' b5 V" B1 V3 B4 S0 K: f
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Then Weight the Third: T* _* t, [' c4 |# E
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Suppose 4-6 > 1-3
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Just like the first Step$ B& ?' q) y1 z8 D( `& \

, p$ a% S0 s" s# q6 D2 S; p4 vs 5
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5 Q) x; x  W3 X" Tif 4=5 6 is the fake one ) d' J7 ~7 a( o  a; ?3 H- B
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if 4>5  4 is the fake one 4 A$ q+ @0 v0 Z/ M* `* {
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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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 k- m, t6 m$ I- C& v% L( X你第三步点去搵 7-12 边一粒???& B& r5 S/ j7 J. Y% J# M

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- i; q' W0 Z( k$ i6 t問題第三步, t" g# f8 z( s; s6 z; C- p) ?
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 8 i! z5 t! |( t3 {/ b  d
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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