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)。5 F, c3 P% n' w& v4 F, G
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？』! X9 ^2 ?% O  J

( d4 I' A7 F; q- B& i注意: 6 X9 [2 F2 s8 V
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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6 M& r2 e% x; v, V
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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 R7 U+ F+ O' s( p6 D7 Z
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# ?% d2 e% E5 M& }等我搵下仲在吾在$ A$ Z) t) E$ H

- `; p5 {- Y+ V- C  L當日用左37分鐘答１２粒波子，差７分鐘才合格。
/ C; X1 w8 P; t3 x13.........2 ]/ m0 G+ b0 g4 Q. c( r

# N. Y2 p7 T$ P5 L* A5 H8 I[ 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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) E  A8 q0 U9 b- ^- k9 \我以前畫左個chart去答,
& {5 w( s1 h" j# a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:) [. q2 t$ f; o3 d8 ?
唔識隱藏...已經諗到..

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  y% o& [. K4 L2 }3 B' Q. l  Rsor !!!....e加改左
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6 `0 m  I4 h; W% g: q( S" 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1 @8 q$ n8 x% `0 B' I# x

7 \& M; S, h; G4 y" f. S6 @[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:! J; T2 f. M& U/ T2 L) K. k
相信e條題目都有吾少人玩...

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* b& C6 {& r& w; _PlayPlay, Let me know later who has the right answer and I will add points accordingly.. |9 K$ T% `$ w1 ^$ G' b
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:7 k/ y+ H6 {1 C

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  ~8 A, n1 A6 i2 ]/ ZPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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2 H6 C" a& W2 }3 \0 x: \: i/ `不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
3 N4 m9 r) P0 K" z6 a1-6 vs 7-12
9 q5 j; w2 B0 A9 R0 kif 1-6 = 7-12     13 is fake* t: [3 \* g% l6 ~9 c9 A+ c  Z" G; A% p* x
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if not
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Weight the 2 time
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4 r! W5 J& ~; V+ JSuppose 1-6> 7-12- g' e0 ^$ l9 @1 g: a
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1-3 vs 4-6
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Then Weight the Third; o+ y! f  p/ k8 F. A, d
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Suppose 4-6 > 1-3
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Just like the first Step
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  j/ Q& o0 u2 l6 R) y) q4 vs 5 * g+ T' L) I/ q- f" E

# A  ^7 T8 _4 k5 [( U  r6 z2 a8 Hif 4=5 6 is the fake one " b& [8 _5 t5 D) n2 R7 s6 j

6 l9 b1 s2 K0 w& `' dif 4>5  4 is the fake one + c9 b- m9 ]: z: p
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4' n( @3 q, t4 C/ ~( m* d
Group B: 5,6,7,8
5 J! ]! u- m6 s/ R% H; tGroup C: 9,10,11,12
. B" J7 b/ D- s6 ?Group D: 13/ p- p- k4 j8 o2 H
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Round 18 M- C4 u7 Q# c9 E$ ?1 U3 b
Group A vs Group B
/ P2 ^1 l7 d2 l# l8 M/ H如A and B一樣, 即較輕一粒在Group C or D
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Round 2  q  |! H' |# l5 `# Y
再在Group C拆成:- |% s& A; G# `4 x' w% g
Group Ca: 9,100 k& H: P/ i6 d: ~; g2 h0 q
Group Cb: 11,12
, K& }# r" L0 X: o然後再秤, 如一樣, 即13為較輕一粒., M' n& y) d5 C) K: R) g
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如不同, 即較輕一組有一粒較輕波子在其中, 2 [. X5 n4 N* C! l, m$ x  M
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+ ^: z! N, S0 L. Y5 `( {5 ]
Round 1; `5 A5 e. ?+ ?# Q5 N
1,2,3,4 vs 5,6,7,8 = equal
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Round 29 T( t# l" d' I
9,10 vs 11,12 = 9,10 < 11,12' J) Y( O; p& C: `

5 h$ ?8 [/ ~% o) Q" J9 M1 DRound 3
7 L$ e9 {1 S) e7 M- R! u/ c9 vs 10 = 9 > 10- j& M  F; M5 r8 X( f: Y
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The answer is 10." n: p, ]( N1 c! v. r

$ K* U+ S" h  K% h$ D; R; Ie.g. #2 假設7為較輕的一粒& p% d* x" M& }7 [
Round 1
! A' e% x$ S- N1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, O2 N, f# s. Y* V$ `- ?

. i2 N1 b( r7 U( b! f7 NRound 2
8 Y5 z: @- x) ]- p& p5,6 vs 7,8 = 5,6 > 7,82 A! I" B5 r# j% Q0 n* B# ^- |
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Round 3
/ h* H" s3 P  s. V# J4 `; m7 vs 8 = 7 < 8' O' s- e9 H) e' h! t) l1 g

  V7 u. B, k+ bThe answer is 7.% }3 ~2 G! q' F3 M
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e.g. #3 假設13為較輕的一粒
2 w" }1 [" Q! Z8 x+ k$ x- _Round 1& I, Z2 I9 n1 a. N
1,2,3,4 vs 5,6,7,8 = equal
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* e' v' G( \6 v2 M/ i! r: E3 x% _Round 2
0 R: c# @) o8 t  \1 v9,10 vs 11,12 = equal3 n& D' x( r/ o& ?2 j% }' ~
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No Round 3
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The answer is 13.
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唔知我答得正唔正確呢?!
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$ H; ^' j. s5 N# ]( E4 X$ ?" E[ 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
- x2 O  C8 e3 Y" K# c/ bif 1-6 = 7-12     13 is fake
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1 i7 v4 y6 {0 z; T( J- BWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 2 t0 {, m. ^- i9 [- I

: v# F4 z! i( s8 FThen Weight the Third/ k. e$ i8 Y/ m( k6 H
3.
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8 z) C7 w" O) u7 O+ `' E+ x& B& GSuppose 4-6 > 1-36 z4 |" r5 R! p1 ?! P
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Just like the first Step
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/ t0 N6 |2 c8 [" e7 ?! a; K6 Z4 vs 5 8 C# i1 y' S( j, w

& W# T0 ^- J/ H) Gif 4=5 6 is the fake one
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$ `! g' {' L) o+ _; W# X2 w/ ~if 4>5  4 is the fake one
* P! O; m5 w, z0 mand so on......................

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問題第二步$ U1 |, s7 x: [5 `- Y
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Weight 1:  1-6> 7-12
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6 A5 Y( W3 n! w( c: v( _0 NWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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7 d7 |3 p5 ]) q+ J. \$ I" @你第三步点去搵 7-12 边一粒???. Y8 `2 j; ?. ?% P4 a6 `
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========================================
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" D$ G. F+ ]& z2 X6 K3 d' _0 Z) X問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 " \* f* \3 p# ]# t( \8 W0 d1 z6 }! @
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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