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7 N5 q) A. n; h0 s+ u5 r5 z
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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)。9 n7 G/ e& }* l3 m6 t& o  y
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？』" E7 ]6 ?! s0 d3 O/ o0 |7 A

# K# J- o! F$ g: `注意: * C# a. U$ Q4 J# W
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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: l9 B* g5 b* P- j2 e6 F9 u

' N5 }; w- I- [9 K: k0 _[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
2 j. U  v& E, @$ x# 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,
5 J1 _) k% A! G/ |等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。7 K! H; E# Y2 F1 V$ a
13.........1 v2 p+ S+ W; o) W$ R% n, w

; R* w! N$ [; v5 p[ 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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& B7 w  D5 x6 M1 h- [: L我以前畫左個chart去答,
7 h- p1 X4 V3 \6 p3 W$ G/ l0 t等我搵下...

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& J$ T. O/ V% @4 {; `! A! H- ~! W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:% n" n  |8 H* u' h
唔識隱藏...已經諗到..

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sor !!!....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- N/ i$ B, n$ C
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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:/ c4 h4 |% D1 ?/ n' p/ T  C  M
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.$ C( u7 D! `" p# U$ _5 m; L

. V% f' ^1 z' B# t+ PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:; g  {5 h5 x: I
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.5 w/ x2 G  v7 E2 z/ {

) `; v' v, T: |" i7 i5 \Thanks

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/ ?4 w4 c+ Y5 J& W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* V" p- D9 `. a' W
if 1-6 = 7-12     13 is fake
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Weight the 2 time 0 c& w3 L( [( m6 [7 s  t- u. @

: ]  J0 O5 W+ b" L( v$ q3 h8 oSuppose 1-6> 7-12
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* I  u9 v' x2 `" G' }: k/ `8 S1-3 vs 4-6
- \/ N; ]2 o2 A2 H) Z
; ?9 [1 Y5 F% P5 I( jThen Weight the Third
+ ?, m; t  X. G3.
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Suppose 4-6 > 1-3# o, b: b* h- A
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Just like the first Step, }' c) W4 Y7 M5 A) u+ M7 Q
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4 vs 5
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if 4=5 6 is the fake one
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) a: f/ C4 _3 d6 J- mif 4>5  4 is the fake one & b& K& B. \' a. I* s" i# W1 O
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and so on......................

hello1997

分3組4隻波子秤
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& K$ l# Z% R/ f9 \* d4 F8 G/ `- O9 xGroup A: 1,2,3,4
+ c: U1 M: e: HGroup B: 5,6,7,8
: z+ O! f5 H1 eGroup C: 9,10,11,12
0 U7 ?* v: m/ [1 i3 A" TGroup D: 13
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Round 11 t% i  x$ r' _, C3 q4 ~/ R
Group A vs Group B4 s% k+ v2 R6 z8 J
如A and B一樣, 即較輕一粒在Group C or D
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' h: A8 ~6 u) E$ a; N$ ]2 }Round 23 {+ N3 q6 V2 Y) `
再在Group C拆成:
7 @% x* k9 X9 }Group Ca: 9,10
: {; B; l9 [' P# `# z, |Group Cb: 11,12
* W& M* l0 [% q6 q. L% ~# l然後再秤, 如一樣, 即13為較輕一粒.+ l8 I4 g: i! B: @+ p6 A
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如不同, 即較輕一組有一粒較輕波子在其中,
& Z8 f# e5 L  A1 v% g( a要再秤, Round 3, 之後便知答案.* t5 Q, l! }9 F/ g
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e.g. #1 假設10為較輕的一粒2 v% m: d5 P) `2 [& F
Round 1
1 X& [3 N' o. f1,2,3,4 vs 5,6,7,8 = equal
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Round 26 q  J/ l4 P) _2 U* b4 @( r
9,10 vs 11,12 = 9,10 < 11,121 t( ?, z1 J6 U: Q6 p
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Round 32 g2 M/ B. m7 N+ t8 \3 S: V
9 vs 10 = 9 > 10
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The answer is 10.3 a# A+ [7 V6 c# Z

' N! R1 \( K  e/ J+ o) e" v( y) Ie.g. #2 假設7為較輕的一粒
+ b5 _* |/ l8 x! L3 ?Round 1
3 f' M% Z2 q7 ~$ @' ?1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, u4 D* h$ |, _6 E' {3 H# i9 G
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Round 2
4 x8 ?8 e0 [2 N5 d1 v0 w5,6 vs 7,8 = 5,6 > 7,8
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Round 3& s- J9 ^. h: ?6 D+ c
7 vs 8 = 7 < 8; ~2 J5 j$ I0 u5 U9 T, `+ [7 E  n

3 ^, h; K% s3 ^% U, \% k% {The answer is 7.
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: P; U$ b4 K) a3 U3 _2 re.g. #3 假設13為較輕的一粒/ P( F) p8 \+ W, u3 X6 }
Round 16 y+ t; `. l1 }$ _* j/ y
1,2,3,4 vs 5,6,7,8 = equal* B9 r4 e3 i9 m7 O5 |

# L$ ?- y& d+ q# d1 XRound 2
! R6 F( I) U' q2 v9,10 vs 11,12 = equal
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2 \/ T* R4 e* s# s; lNo Round 3- Z, m2 \& V9 p1 P. u% Z0 N

8 d( ?0 Q  H* ^( JThe answer is 13.- N1 F& u% z" v/ Z

5 l* q. y6 ^# Q: m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:
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+ R! R4 _* C) Y4 w/ W& z2 p1-6 vs 7-12
- t  U7 Z' W0 a; C* C& D" n  fif 1-6 = 7-12     13 is fake
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% ~5 K" A/ K6 l+ Q5 r; E- ^Weight the 2 time
6 C% S0 q, \7 ^- o9 b2 G) U1 U: Z
Suppose 1-6> 7-12
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& I8 V, ?. b) ~; w1-3 vs 4-6
- v% c6 ~" s3 X
" i0 ^* O. q6 f, s' w8 P; GThen Weight the Third
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Suppose 4-6 > 1-3) n: i+ e( F, ~# w
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Just like the first Step4 ^, S* h( p. @6 U

/ `' k3 X& o& h" P) z4 vs 5 - f: k7 Y% l) `. R

# w5 c. O  A! K& s! Uif 4=5 6 is the fake one
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if 4>5  4 is the fake one
( j9 ^7 N" ]" r  s4 Oand so on......................

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9 @  ~: C& ]" h% v2 ~3 i1 w問題第二步
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) @5 w/ {4 X9 W3 {9 ^1 tWeight 1:  1-6> 7-12
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& T6 B1 Q/ t/ O/ G% y) ~Weight 2:  1-3 vs 4-6 , if 1-3 = 4-60 z  ~- V  Y3 Y

: o* X: O7 z) A8 o, C$ q你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步' K5 Q$ T9 L: d% u0 K# ?

! A: z6 b/ I3 A; KWeight 1:  1-6> 7-127 q, K5 W( x8 Q% b2 m

9 W- {0 M! Y, g2 @4 S+ T, t) ^Weight 2:  4-6 > 1-3 6 \) w0 r2 c: J$ I
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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