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0 B& h* J" j1 |6 E

+ W2 F3 o1 A7 B8 {2 R$ U* K『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)。
$ A3 t" i6 w3 t9 T# C, 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？』3 x$ e+ Y* d1 ?6 `! t
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注意:
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5 c9 u( W6 s* k2 G3 X7 B! n% [* U! K1. 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( x7 b/ ~& M' p6 Y' R5 o( ^

& j/ J  Z1 |1 ~' 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1 N3 d- _$ D! ]& V% P4 t

0 X* H# c: l9 }# q% y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:' B, ]6 r- n0 a5 U4 K! G
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,
/ {8 a) W- p& c8 k等我搵下仲在吾在, C  v6 _$ t: ^  @3 D

& _  v* `' V$ E1 N% O當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ a) @1 @3 ~0 u/ ]; ~1 h. k" r13.......... R# E5 |2 Q2 K, j* p# Q/ i

8 @' C! E1 v" p/ I  L8 }: q, b[ 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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8 ^! Q' Y+ X# ?( e! }% `  X8 {9 x我以前畫左個chart去答,
0 s/ w3 c2 C& d) F2 {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:2 O/ t  ^( W/ S8 N; {9 X; ~( G1 O: z
唔識隱藏...已經諗到..

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) c% {/ a4 }- i" f  p9 osor !!!....e加改左
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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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:5 S0 ?  E3 f$ ~4 p7 d2 |. M
相信e條題目都有吾少人玩...

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9 c7 g, P7 q0 w* P( w+ _  x% UPlayPlay, Let me know later who has the right answer and I will add points accordingly.1 H% L) V: n; F- }$ N
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:. m' I( R9 `" T' `3 I. k3 q8 D

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.9 {9 ]' X# P6 a% T( M6 Q
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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

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1-6 vs 7-12
' Y: P( m7 E6 K3 I7 [/ J( a' Aif 1-6 = 7-12     13 is fake$ N4 |2 |0 e& H3 \
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if not
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Weight the 2 time
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Suppose 1-6> 7-128 f' o2 C1 O% ?9 O9 A) z
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1-3 vs 4-6
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% F1 y+ ~& K9 V* B* W; KThen Weight the Third) S, c/ c& b8 s$ U
3.9 S" l+ v/ e" m. W+ i6 M
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Suppose 4-6 > 1-3/ j1 F) d9 n' m% p; L" T* C: g
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Just like the first Step( K) n3 S" G7 x. h9 \9 z+ B2 u

# F9 E; m2 p  g4 Z9 y% e4 vs 5
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1 p, Q/ h$ E: I) r  Y0 |+ o# Eif 4=5 6 is the fake one
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if 4>5  4 is the fake one 3 o% F/ |7 [* @( [- E: L
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and so on......................

hello1997

分3組4隻波子秤) E* F: h' J9 z/ u  o' b3 R
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Group A: 1,2,3,4/ p. ]9 D0 m3 }  ^% y: r
Group B: 5,6,7,8
6 N1 e/ e6 ?$ t* f$ `/ u0 hGroup C: 9,10,11,12
0 `! I( P/ L* r# |. d. nGroup D: 13
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Round 1
9 Q1 p2 |+ r% W# A, W' L4 R" Y# L& BGroup A vs Group B
1 y2 N: G6 i3 O; _7 q如A and B一樣, 即較輕一粒在Group C or D1 |# G1 G9 ?# x
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Round 2
# P& n) y6 i# U' t  X: M' a  _再在Group C拆成:' L( V/ S0 h: S* D6 q
Group Ca: 9,10
3 B" i& Y+ `% R' [8 CGroup Cb: 11,12
9 W+ z7 G# t0 U" D  ]然後再秤, 如一樣, 即13為較輕一粒.
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3 s3 ]$ N) J( D: z: y8 ^7 {如不同, 即較輕一組有一粒較輕波子在其中,
) D" z, A* _3 L% U+ w要再秤, Round 3, 之後便知答案." n( H- j, C: P: p0 e

0 V" [7 e7 F8 Q7 R6 |& Z) Ue.g. #1 假設10為較輕的一粒
0 b, X3 {, {2 y" L& Z! w9 pRound 1* f* I7 V6 m' t$ ]4 U
1,2,3,4 vs 5,6,7,8 = equal
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$ |' x1 {. C, NRound 2
  v9 z+ E, d  Y2 o( e" M: K: A5 a/ o9,10 vs 11,12 = 9,10 < 11,12
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: @0 M& A' p5 e/ @4 x1 U$ lRound 3. \* {! E# n. T4 W+ ]* [0 p
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒
7 ]' R& w2 D% F, ^! bRound 1
! J( y+ g7 ]1 R1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8! C/ @: y& ~1 y/ |
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Round 25 O5 a) R2 X8 W5 ~3 L' o  ~5 I! q
5,6 vs 7,8 = 5,6 > 7,8( S7 R/ y4 I* v& _! |/ f/ z0 T" l
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Round 3
) g7 I( i7 @/ t7 m" U# |+ f7 vs 8 = 7 < 8. _. T+ P7 T9 M4 i

, a0 L6 I6 w" H5 @3 ]4 L; yThe answer is 7.
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$ q. Z; n' H3 D6 J" S- ^e.g. #3 假設13為較輕的一粒
  O+ |5 X8 H, P) y9 O) e0 V4 ZRound 1( m$ Q5 o7 e3 R  m) f( ]
1,2,3,4 vs 5,6,7,8 = equal. a' Z$ Z' z8 b, k
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Round 24 M" A; k' O" L; ~3 L, S4 A
9,10 vs 11,12 = equal
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! I0 z3 l0 }8 [! oNo Round 3; p% K4 r7 \8 V, m$ U

1 e+ n1 A1 N. i, x" PThe answer is 13.2 @3 o- v: W. R  Z3 E

! K, m3 {$ L! `9 h! q8 ^  w5 k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:1 r5 Z- K) Y1 ~1 B
1.
4 h: ~  ?5 q8 m$ Z1-6 vs 7-12$ M/ F5 R& R) k  j. j# X
if 1-6 = 7-12     13 is fake
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if not
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1 k; J" m* u5 p) c0 _; h+ ?% cWeight the 2 time
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Suppose 1-6> 7-12
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/ o3 E' f' N* F# o# W1-3 vs 4-6 ) j: q% B: @2 s! P# y6 }0 e. x7 X
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Then Weight the Third. F( a" U) U/ O  e2 w. P$ o/ H/ T5 Z
3.
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Suppose 4-6 > 1-35 _0 D7 ~: W% x7 ~3 t
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Just like the first Step/ N  E& b0 z4 }4 W; X4 \9 P

) b+ L7 c* S: s( _# W1 w. X4 vs 5   f, e4 L1 |4 S  |) w9 V  _; \

1 v1 `! `( ]$ R( q0 {( y9 U; @if 4=5 6 is the fake one * z! y5 }3 P. d* y
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if 4>5  4 is the fake one
) I) H; g: g* w( m6 H* }" kand so on......................

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問題第二步$ v  O: i2 i5 h( x9 `' ^
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Weight 1:  1-6> 7-12& K$ |1 T; ]( X" Z. e4 d

1 D+ n" r' O* JWeight 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???; H/ E/ f( g% D  t

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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 # p6 k1 D, ]9 Y  N7 ^$ W

, {8 B% @# d- h9 _! l: z9 {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