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)。
! t8 I; T2 L- Y2 V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？』9 b3 e2 z. |* B/ l4 K

+ G9 o. F# W% p  t$ r注意: " {+ X6 O( b' g9 S& [; \! ]: M
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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) q: F* ]) P' o- |3 }0 s) V

. f% G  x; o/ \  ~  u* o2. 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: v* C/ t6 c$ M1 P4 I
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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:  v8 Z2 }1 r$ U% U0 c6 [( u" `3 I
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,
1 A/ V- ?. Q$ t, L7 ]等我搵下仲在吾在: [9 S0 M7 L$ z* O9 H9 v' j
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當日用左37分鐘答１２粒波子，差７分鐘才合格。4 b4 B& K0 h" [  E# E+ q
13.........3 y9 m. }- U7 @" }) c
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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,6 d7 h* N3 R. j6 ]+ k! j
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:
; s% {3 x5 G8 ~& d" h( t唔識隱藏...已經諗到..

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5 D: j9 K6 A4 K/ a1 J  X1 N: D5 Rsor !!!....e加改左
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5 h* e* _% i1 x  I6 z  B1 f2. 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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& ^* ^; R. M0 D9 Y8 s[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
" a& |4 z; e/ {9 K! D7 s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.1 \7 t2 S% [- w$ o7 s7 b$ x
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly." F& _3 E, r. X: V5 }. \

  G/ x7 {9 O7 x* r$ _. VThanks

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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.
! K* e8 }* g9 u7 }1-6 vs 7-122 {* C2 g* x7 u* Z' V- ]; R9 w
if 1-6 = 7-12     13 is fake( q# y+ A( ?7 X1 P( [
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if not
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9 _, z! {$ @) Y) }, DWeight the 2 time
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" @/ c2 d( |6 s$ C; ?# FSuppose 1-6> 7-12
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1-3 vs 4-6 * Q5 y2 |2 b" R* o" G

  l0 Q" J) Y& N) V- w7 PThen Weight the Third# o3 W. e+ ]' B4 H/ ?+ ]5 w
3.+ w- F' h) F+ S+ ]/ W

0 [1 ~# B' H) n# ~) q0 ESuppose 4-6 > 1-3; x/ z9 B( h2 I  \' x& ^" N

1 Y* v6 g9 k, j) l2 ~Just like the first Step
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: @4 h& ^" k7 N0 |* t4 vs 5 - {7 ]  F' G2 O
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
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* b/ a( \9 K2 {$ f( U6 M! Sand so on......................

hello1997

分3組4隻波子秤7 k( l4 ^8 ]6 R" L. r

0 _' P+ C+ h2 O3 M; fGroup A: 1,2,3,4( n7 Z7 p3 T  u& s( o( P" A+ F; r- z
Group B: 5,6,7,8
) d6 G! E8 e+ ^4 H4 `4 hGroup C: 9,10,11,12
( T% q  H  n7 a% jGroup D: 13
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) ]" s' N8 C0 U4 [$ J: L) K9 ORound 1
4 z% V) V3 }+ i" `% q" qGroup A vs Group B
5 W3 q# O3 ~2 a- C  ?& |% k6 v& E如A and B一樣, 即較輕一粒在Group C or D* a. D8 P0 y% I; ?

4 |5 R+ U5 G, B! N- |! VRound 2
4 t3 q8 D7 Q4 x- T- {再在Group C拆成:
! ~4 s7 c  ^9 F" }' L/ j! o5 P8 tGroup Ca: 9,10, {9 _/ z. X  b4 I. u" M
Group Cb: 11,12
! W7 W1 U5 Z) F$ e9 o" s% k* t然後再秤, 如一樣, 即13為較輕一粒.0 I; f/ {/ x8 k: y' e

1 }, }5 }0 N- P2 ^0 `如不同, 即較輕一組有一粒較輕波子在其中,
0 ]6 H: K4 q" O8 ]- r要再秤, Round 3, 之後便知答案.- B3 a7 c, G4 x/ ]

5 D0 h: L1 G. p; q, f  Ge.g. #1 假設10為較輕的一粒
( D& ^: \1 k/ N5 }) GRound 1/ \! T$ M! ~! A
1,2,3,4 vs 5,6,7,8 = equal1 _) I7 e1 `5 g; t. n5 f

- R! g7 N0 z/ \9 rRound 2/ }/ S2 {7 v( M8 P1 N/ f, ^
9,10 vs 11,12 = 9,10 < 11,12
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/ o: H" D- J1 ~5 ?1 ~$ eRound 3
8 j4 k5 J4 \* d! _9 vs 10 = 9 > 10
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The answer is 10.) c: G2 a7 \" y/ S

; Q& V* [; z4 S1 Y1 ]$ e. b# y! le.g. #2 假設7為較輕的一粒8 L# U: r* K+ P
Round 1
- Z9 c+ v) d8 _9 V' c. |8 W1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2! r8 Q  h3 ]; P2 {' t
5,6 vs 7,8 = 5,6 > 7,8/ y8 B. i( x9 E. F# E/ x/ V7 w2 M+ i
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Round 3
# A- \3 u3 A1 z" Z: P9 Z6 v7 vs 8 = 7 < 83 A' ?9 n+ X7 U

$ _( C; U. R& BThe answer is 7.
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5 r) _! x# Z4 F7 s, K: oe.g. #3 假設13為較輕的一粒% w7 i! `) M8 D1 T
Round 13 H  V0 k! \. `+ s+ \! G
1,2,3,4 vs 5,6,7,8 = equal. T/ D# b+ k7 E1 E/ {3 d6 h
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Round 2; `( i, W( A4 J& ^4 S
9,10 vs 11,12 = equal
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No Round 3* T$ h5 H5 K# ~4 z/ t) t
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The answer is 13.
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- |) Q2 x  {/ |2 ^, \5 W唔知我答得正唔正確呢?! 8 E0 _9 B( t6 D+ j4 R. A! x
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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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& q( k0 E/ p" I' A6 ^+ x; F1-6 vs 7-124 \7 V) \* I& p" M" w2 f- N. ]  [
if 1-6 = 7-12     13 is fake# @$ ~" Z/ n" T1 _! h

4 M: K& E% Q* E/ f& O, B# ^if not & q' S( d2 P; U

( o1 p+ h; C$ H4 rWeight the 2 time * i5 P8 z. A. l, O/ z; @
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Suppose 1-6> 7-12  d; g- C9 i: c9 t+ v

: Q, d6 b$ n! [; x1-3 vs 4-6 , C3 X' a. |$ p3 T

6 `$ g7 t7 K' Y& K( U* g; h6 P. iThen Weight the Third" C1 X0 ?) `9 u2 z1 n
3.
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Suppose 4-6 > 1-3
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( {, m4 d! Y& m; s0 \  BJust like the first Step4 i  D6 ~6 S8 D5 K& x) v8 Z9 }+ T

) C! I" z3 z/ G" o! ^4 vs 5 & J3 q1 d9 Y& t4 {/ N7 ^

9 x/ g; E' Q; N2 Dif 4=5 6 is the fake one % B: E4 K8 M& N* w* ^

$ k, _. _7 J( J  T8 [/ T4 T1 [if 4>5  4 is the fake one
0 ^4 X$ k4 M( O2 {and so on......................

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# c9 r$ l3 D1 ~* L: ~) p$ E8 E問題第二步( z! n* g2 e& ?  ~+ y

$ s  [2 b7 W' ^1 FWeight 1:  1-6> 7-12% ?  [2 K% \* p: i
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Weight 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???$ i$ Y% E0 E+ h" a! Y; v7 ~0 F& v# z
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1 b+ |# @* I$ G- G1 }$ P1 v2 U問題第三步) |& d2 w: ^" \3 B: ^

) e) y0 w, z- r9 h; |Weight 1:  1-6> 7-124 Q/ U& A" m5 V$ T8 M6 w8 i

1 A9 x. h% R7 i# ]# t+ i  s$ b" C! GWeight 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