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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0 \! i8 m* L2 V6 R/ Z3 Q: h『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)。! k5 b: x2 C$ [1 I, m$ F
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: 6 w2 q; D4 O, K
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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; O7 Y! G+ `9 j8 K0 d8 H
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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
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$ M  |1 ?" o% n0 x  V[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:+ `4 n0 U* g: c8 z3 _5 r) V" }
相信e條題目都有吾少人玩...

& B' s. [+ ^+ {我以前畫左個chart去答,
3 W) ?( S) e( [3 T7 v等我搵下仲在吾在, v% q  K! V/ r# ?8 r

( s0 Q% ^4 l8 Z; ]5 ^( L當日用左37分鐘答１２粒波子，差７分鐘才合格。1 E+ h6 f, z  P5 ]/ h
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:
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9 i  p" h. V: P, @我以前畫左個chart去答,& m* ^5 q) c" r6 U; @  S
等我搵下...

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$ w  [$ C) y. F; b; `" E# G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:0 J, M7 |. i3 ^( ~/ ^+ \* ?5 B
唔識隱藏...已經諗到..

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6 w/ W* |  D6 r4 k: Csor !!!....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:
  Z, P" K' v9 [  h, f& q3 ~5 W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 n9 v& A  S% U: E  [0 d. z7 K3 T
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:9 o  [# b5 o0 j

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.7 d0 ~/ E: C/ ~* B- s& ]7 }
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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

1.
. K& F+ U" X# }$ J8 F, U0 o  f" J1-6 vs 7-12% t0 X+ d1 L$ V' u! A8 d6 s. D
if 1-6 = 7-12     13 is fake
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if not ) M6 `; h) k4 c2 Q! q0 J! p
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Weight the 2 time   _( @# `& K) B
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Suppose 1-6> 7-12# ~3 [3 N9 ^, b/ n" W
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1-3 vs 4-6 & y% f. [( k8 A+ c9 Y' d) b1 T- v. g
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Then Weight the Third
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Suppose 4-6 > 1-3
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+ K3 w4 u5 W1 c, UJust like the first Step
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4 vs 5
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if 4=5 6 is the fake one + V- G5 |) b; |

6 {, h. Z) T4 G4 G+ Y( h% Q1 lif 4>5  4 is the fake one
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7 M3 J) ]' |* M9 I! wand so on......................

hello1997

分3組4隻波子秤. d* B& `. K0 F' D4 F
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Group A: 1,2,3,4
5 n7 L) q' ]0 cGroup B: 5,6,7,8
4 I; i* n! \6 H, y1 ]Group C: 9,10,11,123 F1 I5 W1 r1 s0 S5 Y2 N" f9 `6 ]
Group D: 13) W0 u( Q0 T3 j7 V5 K; b8 C

$ D! \! E7 M( m! k# n# sRound 1. Y( s+ F6 K! V. [" o) M
Group A vs Group B
4 j3 X1 s/ e. \) C0 ]2 |$ @! d如A and B一樣, 即較輕一粒在Group C or D
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Round 2
) L! p' u+ q. o6 c6 ]再在Group C拆成:% ^9 Q- [6 m$ F* S3 g+ }% ]
Group Ca: 9,10* q4 L0 J, x  r0 q. i
Group Cb: 11,12/ S% I& |! \, t1 K( y
然後再秤, 如一樣, 即13為較輕一粒.# m4 ^0 \- s. Z, |/ g
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如不同, 即較輕一組有一粒較輕波子在其中,
1 @' @' a& V0 ?$ O+ Y  C要再秤, Round 3, 之後便知答案.# f5 a9 `; q$ G+ {& |1 F2 G$ q

; e# T9 q) Q. R8 @; L1 x( ue.g. #1 假設10為較輕的一粒5 U' G' {* x& K. I! `) {+ p
Round 1
0 K$ q5 T; q. J. |1,2,3,4 vs 5,6,7,8 = equal- C: M) q- v9 A2 |0 [  C! e" U1 u

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9,10 vs 11,12 = 9,10 < 11,12
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3 x  [  R' Z1 {' }' VRound 3
' M  O" a# p4 h+ c9 M" s9 vs 10 = 9 > 10
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The answer is 10.4 |3 l; l, `; }7 T- U1 s! g

" y' g# ?1 C: x7 j; We.g. #2 假設7為較輕的一粒1 J+ ]/ E! ^- [* @8 a
Round 1
( G$ ?9 S1 W$ U2 B0 a1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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* l4 u" \/ e7 t. n% ZRound 2+ G* g# j" a( |; J1 b# X
5,6 vs 7,8 = 5,6 > 7,89 O4 S  \1 ^( G5 k: ~8 M& @

) C1 X/ H" M: g- c* _" fRound 3
  d% ?4 P! ~, l9 [- J) K7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒% L* _7 ]  w4 ]) m% k- g) g
Round 1- ~  }& S: l- m. J1 v  b
1,2,3,4 vs 5,6,7,8 = equal
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Round 2! g9 q# B$ z, {2 Y2 S
9,10 vs 11,12 = equal
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No Round 3& e" D4 k' M# [

9 A4 d  g/ ?* s8 P& m) U/ s5 sThe answer is 13.
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/ W$ }9 p' P8 N4 c! m: e3 o唔知我答得正唔正確呢?!
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/ @, ?* B% }3 y: s7 x[ 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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( s1 f6 y& [1 G1-6 vs 7-12
2 t, W) s7 Q; Gif 1-6 = 7-12     13 is fake
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6 R7 @! Y5 G& @9 U" E  |if not
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1 Q% K8 v5 r) i; F. k9 }Weight the 2 time
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2 }+ `- B) b' d% B9 p: s' z% TSuppose 1-6> 7-12
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1-3 vs 4-6
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/ |( B) _% X8 j( ^- \5 o* j5 CThen Weight the Third, P- Z: [: A2 S: L
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* `; Q! T& V' U* }. }Suppose 4-6 > 1-3
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Just like the first Step: [/ o3 {: A. d# C

* m# }) n3 g% R2 [- }! p4 vs 5   ^9 _: C4 {1 I- J: S  B! s! I
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if 4=5 6 is the fake one & A8 A4 p0 y1 j- O* w  K

# L# e% a# P' n2 B8 U4 Lif 4>5  4 is the fake one
4 w7 h% _& ~. f2 oand so on......................

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. ~% ~0 S1 [/ d! k+ D+ j問題第二步) r1 O3 o% z- R+ B6 e6 l1 K

2 H4 y/ k1 q$ O1 Z0 wWeight 1:  1-6> 7-12
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4 I( v2 a0 D/ X. T% S) p& tWeight 2:  1-3 vs 4-6 , if 1-3 = 4-65 G& I* A, L# ]9 |) x* T) E) t7 G
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你第三步点去搵 7-12 边一粒???
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: A" A& L2 @4 Q, b4 N% O% ^; s問題第三步+ g9 v9 w: H* F, D6 D$ x" c
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Weight 1:  1-6> 7-124 C8 i8 n+ U  `' n. G  J/ ]
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Weight 2:  4-6 > 1-3   g/ V9 g' `5 t4 B* x: 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