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9 ^  g+ l* `, H! m
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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)。; c3 r/ I0 M7 z5 V! f" y9 ]
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？』
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注意:
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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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$ u3 |6 N; R" S& h( j2. 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
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( }/ z: H' Y/ M4 y; a4 h$ X[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
9 c3 |4 l9 c! f; s7 K" \! S相信e條題目都有吾少人玩...

) {( h5 r7 v% l8 X9 b8 p. I9 @我以前畫左個chart去答,
' |: E4 J, V3 G8 x3 U等我搵下仲在吾在8 k) R  c7 `& H7 m/ \

8 t2 x# M: C9 X* k/ e6 n當日用左37分鐘答１２粒波子，差７分鐘才合格。, Z! {8 v  v( v& s; a, f
13.........
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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:/ ?) c% l( D" W$ T

) A* A# ]6 X  R: m我以前畫左個chart去答,
0 |1 t2 c* G$ }' M% O等我搵下...

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; x: n: Q4 x2 J& `0 ~8 w3 X+ F7 Y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:
' `1 n+ z2 K% D唔識隱藏...已經諗到..

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sor !!!....e加改左
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3 _* Q& H5 j% F! G% T8 G" u: i2 |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, g1 T1 ^5 l) Y, z: K- K. x3 D
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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:$ A2 O& [- V$ q( P0 Y6 Q& N1 \! }
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.; O2 D* r4 M1 u* C3 f, d: b
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' v5 m6 r, x6 D

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.8 N7 j3 ]' {- D, @3 p

8 T3 @: g1 w3 AThanks

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5 z3 m3 e/ n# i- b# X) D! }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
5 E( J& |7 W3 O& F2 t$ g( Xif 1-6 = 7-12     13 is fake
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if not
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' I% g+ `5 @7 ~Weight the 2 time
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Suppose 1-6> 7-12
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+ ~# h- K0 u( x0 \3 K9 A7 {1-3 vs 4-6
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- N& C+ S4 r0 C3 lThen Weight the Third
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Suppose 4-6 > 1-3
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3 K- Z- D+ H! RJust like the first Step
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if 4=5 6 is the fake one
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: L: @) o) z$ W) q3 {if 4>5  4 is the fake one
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9 X+ E1 L4 b. O8 F, fand so on......................

hello1997

分3組4隻波子秤( m, f- n4 ~6 o

# y/ p- Q' c6 mGroup A: 1,2,3,4) c$ R  k" x0 C/ k, `
Group B: 5,6,7,8; @% D: q- l# j! d4 T
Group C: 9,10,11,127 o+ T7 Y9 B, @
Group D: 13
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5 Q, C& z$ X0 hRound 1
1 I1 f# b' W6 f% Y2 BGroup A vs Group B; n6 P  }! \. a6 D5 p
如A and B一樣, 即較輕一粒在Group C or D9 H0 k3 g. U, N' P

& }8 j# F9 t6 W- p/ H/ ]Round 2
5 {5 R4 k' _  J% q- k再在Group C拆成:
5 X$ u, i' u' AGroup Ca: 9,100 S5 i, n7 q  ]$ H9 _4 B# L
Group Cb: 11,12% B  }6 K* q- Y! w! }8 P2 _* U
然後再秤, 如一樣, 即13為較輕一粒.+ ?( J/ s6 P& X9 D6 M  E/ i
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如不同, 即較輕一組有一粒較輕波子在其中, 0 i/ r5 o% C7 U0 ?9 a7 d4 V
要再秤, Round 3, 之後便知答案.
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% z8 ]- j4 M6 k. U' X0 U  ne.g. #1 假設10為較輕的一粒
/ e$ p! {! S  m) ~Round 1
4 s& H/ U/ _3 g( Y! A! \% D1,2,3,4 vs 5,6,7,8 = equal
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Round 2
' _  E1 N/ B7 U# \9,10 vs 11,12 = 9,10 < 11,127 Q1 B) l9 d0 f5 |. f

5 I6 o$ ]( n8 y# S9 a: SRound 3! K/ i" Q$ v: M5 E! T/ W
9 vs 10 = 9 > 10
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The answer is 10.9 Z7 `; E* v, h6 L
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e.g. #2 假設7為較輕的一粒
- i$ ?6 o  P/ H. q5 _Round 1
1 _4 C4 \# x5 f. i1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
& V' E) [, H: B& M6 j5,6 vs 7,8 = 5,6 > 7,8
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7 vs 8 = 7 < 8) K, E" W! z5 T
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The answer is 7.
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( a( J& W5 V9 X2 Me.g. #3 假設13為較輕的一粒# P  y0 Q6 H% g! {- t7 S. J4 K+ v
Round 1
& S/ a0 E# Y  W- K/ J# Z1,2,3,4 vs 5,6,7,8 = equal2 c1 H/ v- ?7 T1 m8 t
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Round 2& }; @1 F  |) N& a) c
9,10 vs 11,12 = equal% y- A" g( J2 Y( G

/ d9 q- j9 x7 l! C3 g$ WNo Round 3
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4 Q* f- z" W9 q1 t1 HThe answer is 13.- ]5 `- r" D* H9 R8 ^
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唔知我答得正唔正確呢?! ) s* I0 m5 e" ?6 I/ g3 a, l/ g
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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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1-6 vs 7-128 }5 I- P) v+ z- E$ a$ Q
if 1-6 = 7-12     13 is fake
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if not 9 B# b8 j0 s1 U+ ~$ B5 R/ E

& j0 N$ W% ^0 AWeight the 2 time
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Suppose 1-6> 7-122 V( w1 B  H4 X' j

( m5 L/ H' U  f1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-32 c3 ]4 D! P  s  u: s% N! k; h
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Just like the first Step. T$ N' P7 o* U9 ?0 T% h: D

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if 4=5 6 is the fake one
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if 4>5  4 is the fake one , {, F- o- Q, ~2 c8 Z8 i
and so on......................

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9 O, @- Z0 ^/ T; d3 ]問題第二步* F( f( d! J& d" Y1 u; R" [
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Weight 1:  1-6> 7-128 h% _  G, K( g4 J! J* }6 H
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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???
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/ b+ I$ a' o8 ]7 n* b2 U問題第三步
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Weight 1:  1-6> 7-12; i' P; @* h1 `  m1 j* q0 v
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Weight 2:  4-6 > 1-3
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; z- `9 ^3 Z: d( M( ^7 P; t$ V: a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