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)。
$ G* _, J9 S' {- {1 B3 [8 a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？』# ?2 m! n! m! v7 I" ^$ u0 f  V: i

; m" n/ x& v/ m, I# Q( D: D& O注意: * K" r6 C  c0 d8 |% 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
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: K2 v. ~' D; c# k2. 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8 _6 ?. h5 i* K

0 {, Z# q) [, q' R. q1 w[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 x. S7 X1 U( S相信e條題目都有吾少人玩...

& f& D0 M! y5 q! r& j; l我以前畫左個chart去答,8 `( ]  I% v/ N
等我搵下仲在吾在* k% m1 e# c% I# }+ O2 {, i4 V

: o& y  x. u4 N1 I當日用左37分鐘答１２粒波子，差７分鐘才合格。
1 w( l7 R, J: t6 z8 d& h13.........
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/ s; W* V) }& c. I$ E6 j[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:2 a8 ~! o: b4 p
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我以前畫左個chart去答,
1 N- i9 x; x1 r) `- q# H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:, M1 X% r6 r2 ^2 o3 W9 W
唔識隱藏...已經諗到..

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* b! ^1 w  X; G2 ~. n$ L/ e  Qsor !!!....e加改左
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3 }# U4 L, P. V2. 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$ t- o( l7 t% v
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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:2 b! A( W' L+ Y! r0 d
相信e條題目都有吾少人玩...

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, e- [6 E9 j, h/ r/ U4 [# d# Q& T3 ]PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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$ O0 H9 v9 w4 V1 ~3 `; _1 b/ G* B& rThanks

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.
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( E  M+ d; }- J+ GThanks

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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.
; T7 U, {$ h" m( Q2 I; x; @# I1-6 vs 7-12
( c& v+ @! m( X. z2 ]1 R# Vif 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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' m! }. r% L: k" i6 aSuppose 1-6> 7-12
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0 @$ I- L7 s5 W& Z+ n0 W8 _& Q9 \1-3 vs 4-6 ' W; q/ q: {" j. ]2 q4 B4 l9 r
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Then Weight the Third
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Suppose 4-6 > 1-3
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3 E% B, U  ^% t* W! u2 cJust like the first Step
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6 x7 \1 a6 o6 G* w6 M4 vs 5 3 o/ d% ^- a; n7 k; e

7 J' C; X) v  k* G1 Z3 C& }1 Fif 4=5 6 is the fake one ) K5 F8 E7 ~; D7 v0 E. {4 q4 [5 S
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if 4>5  4 is the fake one / n4 a9 S, U$ |$ w
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and so on......................

hello1997

分3組4隻波子秤! B* Z+ G+ W# t3 ]
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Group A: 1,2,3,4+ C0 q/ |/ n8 [& ^! z
Group B: 5,6,7,8
( N* o. X6 L7 d. B9 z0 b4 LGroup C: 9,10,11,12
4 D/ P' D0 r" \! F" ]Group D: 13
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. q, q$ |  e3 f% }Round 13 M; @& }4 h' A3 s7 a% x2 L
Group A vs Group B
0 d6 G. j) k7 b6 P' D如A and B一樣, 即較輕一粒在Group C or D
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( _2 p" w; K5 G; ~5 F! i* G4 T' J* L% L6 hRound 2
' ~# a. H: O# C- y. S. w再在Group C拆成:6 h0 Y0 f8 X1 M" P' N& P$ W# \
Group Ca: 9,10, S: [0 U- }3 Y* I4 D9 n: C0 l
Group Cb: 11,12
* E% t* ^/ j7 w& n7 r# v3 W然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, ( i: v& D+ p; Q- c$ t+ `: }" W$ }
要再秤, Round 3, 之後便知答案.
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" P' p2 q8 ?: _6 |$ F6 [' ge.g. #1 假設10為較輕的一粒
* Q  D; G/ B% U# ]Round 1( Z' @% O% x! O" |$ \
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
# A. d  O9 r6 S+ u; H. m- x4 c9,10 vs 11,12 = 9,10 < 11,12
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Round 3, p8 p& c( a7 e8 G
9 vs 10 = 9 > 10
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The answer is 10.+ d1 s! v- S- n( ?
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e.g. #2 假設7為較輕的一粒+ o1 g4 u+ L8 }7 u
Round 1
& b8 }3 P6 g5 |1 q& N, a$ O2 Q: R& h1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8/ ?0 l& s8 a6 {
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Round 27 _- l: M9 [' g7 Q
5,6 vs 7,8 = 5,6 > 7,81 y) t) T4 H' y+ j* `

  E- @, j+ r7 t! fRound 3) t* `# J3 N0 }7 m$ F6 |9 C
7 vs 8 = 7 < 8
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. f' p9 u' s1 }6 FThe answer is 7.& E) L+ |6 E0 @& Y! z' W
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e.g. #3 假設13為較輕的一粒( L" f, A6 z/ ?- A: e9 X
Round 17 T, n3 t9 K  e( [# ?* v. `
1,2,3,4 vs 5,6,7,8 = equal/ ]5 B/ T9 Y5 a" e+ [) [3 Z+ ]

6 P, K* a" f' T; b0 }/ qRound 2( G5 g5 Y4 K/ ]* K2 W% B- g; J+ C
9,10 vs 11,12 = equal
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No Round 3# y) x" z9 w+ |$ Y+ p1 y
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The answer is 13.! A1 z6 B7 P7 `0 q, S# q

! {( u  c0 G5 [8 ]) X唔知我答得正唔正確呢?! ) M  T" o! i$ B. s4 _

8 F$ G7 w3 ]0 j/ [% j( U2 ]1 s! P[ 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 7-128 B3 d# h; X0 f- R; S
if 1-6 = 7-12     13 is fake/ X& p1 q# N7 M; v3 T& Y* J9 [# R
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if not
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Weight the 2 time
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Suppose 1-6> 7-123 I0 E5 w$ }& N9 c( k

9 Z+ [. J" c1 s/ e1-3 vs 4-6
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7 [) ~7 A; ]$ ]# X- H# q5 c& YThen Weight the Third+ K4 l; q. Z% C- a4 o. H% \
3.
  {, q# _4 S& Z' V5 c! z: n+ J: `7 {: Q* m9 y8 I
Suppose 4-6 > 1-3
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6 X* }6 X4 t5 d6 K5 QJust like the first Step
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4 vs 5 5 G" n" y: |! J* y" X' E

+ y1 t- ]* u% r7 x5 w+ a8 S. bif 4=5 6 is the fake one 0 ]" D: D1 F) m5 l

+ K& z8 z2 B6 Z7 q& w" Z  n. L5 Uif 4>5  4 is the fake one
3 z( n. f0 A4 ], R1 l. yand so on......................

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, m5 B: Q# u7 C問題第二步
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Weight 1:  1-6> 7-12* l. I0 j# l& [$ U8 }4 E: M

& n, s9 Z& a* B) NWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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( J3 \3 I& {: @你第三步点去搵 7-12 边一粒???. s2 u' i4 L3 f+ u/ T9 v

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# t5 r) k2 J( M9 B5 T5 F% ]& L問題第三步( d5 ^" a4 t7 O
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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9 K7 G2 g2 D/ A* \6 r5 B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