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. D. H' {0 F5 Z# P7 Z7 ~/ K$ h& R
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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)。* S. r" r4 ]3 [$ x. 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？』+ M! `2 y# E3 E) R

9 K( E& F- E/ M; _注意: ! T2 B$ X' ]8 Z# a: Q5 m

  m6 b, [1 J+ [2 n- f& i* L- `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 x! W2 k+ I9 v+ u2. 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 a2 Q; U; |- y; |% @, |9 h, g

1 g7 v- x  K( @$ `# p[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:# E! i6 w2 B9 T" _9 A% ^& U
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 D7 h7 F/ B& A! I8 N
等我搵下仲在吾在' A8 ~- w1 j/ K7 g: {* B
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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[ 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,
( v8 E6 V; m* ~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:
+ f" f% V0 b, A3 X  R1 p  j8 j' H& I唔識隱藏...已經諗到..

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sor !!!....e加改左6 ?# ^" g7 f* |2 n( z) u6 P" _- {& y

6 |  p: i& N9 T, {: z2 m* I2. 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9 r: ~  i. ~7 A+ v4 |4 ^' u  W

5 p4 \, s% @  I8 n  a' C$ @[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
9 p+ L  E& {. S9 R相信e條題目都有吾少人玩...

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& ?/ W  v6 F, c. _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:: t- f% w% M; D+ \1 o# s7 _
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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8 B$ {" t6 ]  U3 v! FThanks

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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.
' e2 I" `. j( w1-6 vs 7-12
/ ~; Y- ]' S' ~" ~4 ?* ?8 P/ aif 1-6 = 7-12     13 is fake, h7 J/ [, `4 r6 g. l
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if not
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; W5 Z; B2 J! W( N( O" EWeight the 2 time & V/ r; Y' L5 O8 I
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Suppose 1-6> 7-12
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/ |( O# ^' d6 V" \1-3 vs 4-6
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, E. i* p  o9 |' MThen Weight the Third
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Suppose 4-6 > 1-3! H! r& v, c' H0 r

1 M2 J" R- [0 j9 R  `; d' B# |4 [, xJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one & D5 X* j/ W; h4 ?# C8 C* o
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if 4>5  4 is the fake one . ^. ?( a8 Q2 `- u1 |) {/ \

4 Y& T% e: Y1 [and so on......................

hello1997

分3組4隻波子秤' W! d! ~0 ^* {" K4 T

  N3 L3 ]5 D; s7 {! K0 X5 xGroup A: 1,2,3,4( ^0 G- T1 t8 R# h0 ~
Group B: 5,6,7,8* ^9 t( V0 L: @( i) m5 k
Group C: 9,10,11,12+ O+ g" `$ H) f! [) d
Group D: 134 z% R- I) T$ K. ^
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Round 1( |' D: c( x* g2 }! o
Group A vs Group B
3 o0 F  C6 R% D; z如A and B一樣, 即較輕一粒在Group C or D
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: c9 L( n4 R; C2 |8 ~% l8 BRound 2
: L5 b  B! o# [0 j1 Z再在Group C拆成:
! j: Y+ H( s- |4 g1 `Group Ca: 9,10! v" p6 E' L2 }% A0 X1 k
Group Cb: 11,12
5 `& Y8 L8 v5 X& J; q% A然後再秤, 如一樣, 即13為較輕一粒.
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+ O, Z, G3 U  I3 u, i如不同, 即較輕一組有一粒較輕波子在其中, / e$ O* a  n$ Z% v# k5 @3 D
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; S/ a* C* A( ^3 h
Round 1+ x- D  {( ^2 \; h+ c
1,2,3,4 vs 5,6,7,8 = equal
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' S& P: y: c' I. mRound 2  w% D; p" Z/ R: r' |
9,10 vs 11,12 = 9,10 < 11,12
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Round 3: {) s' ^4 r6 T# r% \
9 vs 10 = 9 > 10/ L$ f1 C" M1 V$ c" ]6 r% ]- ^
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The answer is 10.
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. t0 C& u$ y+ I( [4 A/ c- y; E3 {e.g. #2 假設7為較輕的一粒7 E  E, i$ O6 p( i* p
Round 1
6 X) S2 ?3 c( o1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; H% @9 N+ {! U: \7 r: ]  D3 ]
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Round 2
, i: c& o4 B& N5,6 vs 7,8 = 5,6 > 7,8
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7 vs 8 = 7 < 83 i' c% i5 f+ y) {- j' b. e

; N% k" U" z5 o) b0 uThe answer is 7.& Z$ B$ C/ V5 t, D5 F
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e.g. #3 假設13為較輕的一粒6 T! W4 H6 \& I
Round 1
. g% b5 k+ w' W" Z1 P1,2,3,4 vs 5,6,7,8 = equal
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: D! ~+ g: O& I7 aRound 2
- ?' a" Q2 a- f; j2 m& A2 X9,10 vs 11,12 = equal2 h( x& Y: g9 Y! v
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No Round 3& e/ e1 F: q" s+ c5 o8 U( A/ g
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The answer is 13.) p  P$ X  G4 I. n
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唔知我答得正唔正確呢?!
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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:$ e( f- |8 R4 R7 o8 K6 n% m$ N' R
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1-6 vs 7-129 w- R( \* r- ]4 n$ r- s; e
if 1-6 = 7-12     13 is fake: x/ k! O& u: x) G6 Q

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: L9 S7 |1 d% d' n; g5 t( uWeight the 2 time - H& f" t+ ]; d9 u
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Suppose 1-6> 7-12
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1-3 vs 4-6 / D* F0 R- V* a' o( \- p& ?
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Then Weight the Third+ }- @1 i2 d' a( W6 F: @
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Suppose 4-6 > 1-3* \9 K" C5 R* w$ T9 Q
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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
- X3 C, h/ R/ t$ b+ l+ Z: Land so on......................

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問題第二步& c% E& C' B5 X( ?/ D& @5 |7 D% Y

/ y: H& V1 |- J. x9 I0 S0 U' FWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, ~. L! a7 N& e

) F6 Y( }1 o, V$ B你第三步点去搵 7-12 边一粒???
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5 B+ d) r* ^7 U& J% J========================================+ @. I1 i/ @' K: Z! o
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問題第三步
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Weight 1:  1-6> 7-12( _  G/ Y, A( ?% l% v, Y
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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