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8 J% X1 X' J  E
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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)。( }) J) ?! l9 S$ ~' r' 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: 3 e1 N( {1 B! h; f5 _
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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4 `$ A& D- o! x, c" F- G( X. R* _
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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. J5 |" n6 q) [. ^5 s; L

) G; m; q# n) w; q/ o# ~, ][ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:7 s2 t5 j2 V1 L8 @
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,
& E2 L, R: m9 d% g, [等我搵下仲在吾在
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* W: O2 O" |3 k! E4 P1 o當日用左37分鐘答１２粒波子，差７分鐘才合格。1 v* S" F3 ~- x2 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 Q" P, D5 ^( {1 E我以前畫左個chart去答,6 c- ^2 `  `9 [! {; P+ l4 ?
等我搵下...

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$ z& X4 _* Y  U# z1 @7 F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:
( Q5 q/ L8 V7 A4 G5 F& L& v& m唔識隱藏...已經諗到..

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8 P2 y$ J% Z4 Ysor !!!....e加改左9 ?; r  @0 ~/ H  x

. o) x  ~; {4 x  H2. 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. F  J4 X% B5 i0 J9 a
相信e條題目都有吾少人玩...

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. w# f# c9 P2 l8 T8 VPlayPlay, Let me know later who has the right answer and I will add points accordingly.8 t) H# ?$ I1 Q8 R

& V6 V4 A- [  V1 @. f( iThanks

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.1 Y+ K# q6 @2 o- F* d. g: b8 X
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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

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1-6 vs 7-12
6 N, ~) `9 p/ A/ y( k6 K' z- {if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time ) d/ |, b' [$ W
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Suppose 1-6> 7-12& g6 c$ V7 L# K7 W: q+ {( U- P% N
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1-3 vs 4-6
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  F2 t' w  {1 S$ v$ W. @% Y0 fThen Weight the Third' d0 c7 j5 d4 T+ n/ W  L, T
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Suppose 4-6 > 1-3  l- a; d& H& d8 |7 x( d% v
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Just like the first Step7 x6 O$ \, s$ N+ `5 |1 G3 P- ~' v
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4 vs 5 4 r6 V1 n7 o6 \5 n; u

3 ^6 [2 M/ \5 E" zif 4=5 6 is the fake one 8 O+ Y+ P3 N# D; e6 ~

' ^& S2 x9 d+ C. f7 aif 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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3 u( V. A7 G( e1 k4 n8 B. H* hGroup A: 1,2,3,4% H# [" N) @) s( b9 I' C
Group B: 5,6,7,8
) L" I& E" u; lGroup C: 9,10,11,12. J6 k( }2 C9 S9 R  O6 D+ t
Group D: 13
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Round 1' N- Y: V$ r) |9 b6 j
Group A vs Group B
" Z& ?" A' Y/ a* K- t8 h/ T如A and B一樣, 即較輕一粒在Group C or D( y& \1 c$ J6 |) U2 J, A2 G
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Round 22 K& t+ ~( K1 w3 p! x1 a
再在Group C拆成:5 D' v2 h0 B5 P3 l9 a3 k& B' T
Group Ca: 9,10! B5 I$ M4 F0 p3 d& d( ]* y
Group Cb: 11,12! A4 R; D4 e# Y* |
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,
! O; c0 v: s0 v要再秤, Round 3, 之後便知答案.
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" d3 }. D$ j# D! @7 ]1 _, K7 o3 ve.g. #1 假設10為較輕的一粒
) w- j$ l8 T7 X% Q( M0 q1 Y8 E9 @Round 1, I; m8 v5 Q: i& P7 T
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! u7 P' {9 e( c9 w3 h9,10 vs 11,12 = 9,10 < 11,12" v# F) `2 l- a; B/ t2 n- }: S: r4 h
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Round 31 E7 h2 H6 |* n$ r
9 vs 10 = 9 > 100 @2 \; W% G2 b' x* {1 ]% O

! T1 I3 X  d+ x) d) M7 {8 M7 tThe answer is 10.: F0 X% X$ N; r( y1 W) ~( ~6 Y% Z% {' n

2 c; y6 j$ S4 \5 D. X4 g5 T! R) ge.g. #2 假設7為較輕的一粒, b0 _" e# T' I% @* q
Round 18 v/ R- f8 h- G6 d/ T
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2' W" ~3 L2 Z  k
5,6 vs 7,8 = 5,6 > 7,8
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) q- z8 y$ J/ w/ R0 |, l) {3 s9 @Round 3: F2 W, y! _/ ^% ^: l. X5 f
7 vs 8 = 7 < 8
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9 E& l4 v: l8 Q; p5 I2 A# ~The answer is 7.
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e.g. #3 假設13為較輕的一粒5 |0 D: q1 `' @0 |( o! u/ I" V5 a  }
Round 1
9 B" R) ^8 y1 @! Z/ q5 n1,2,3,4 vs 5,6,7,8 = equal$ f6 m- J9 ^2 ]+ }; S+ l

7 }: ?( H1 \& V0 V2 d5 e/ aRound 2) g# G" N( V! g
9,10 vs 11,12 = equal
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No Round 3" a5 ~7 S0 `. O: |& G

* M4 i# }( a' G/ J, t# lThe answer is 13.7 Q: p& `5 V; V$ K- T
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唔知我答得正唔正確呢?! 6 G6 S( m/ j  _5 F! Q3 ^
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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:% ^  k& P+ o, g
1.
* v1 l5 N  g( R) b9 @4 q9 I- Q3 n1-6 vs 7-125 {) @( e4 P9 b
if 1-6 = 7-12     13 is fake/ m1 S. N% G+ {

3 }. R, ~( K8 p5 \/ Qif not
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Weight the 2 time 9 w4 G8 _% \" ]5 x  o& p) d

5 j0 Z& \2 e& ]$ qSuppose 1-6> 7-12  p2 ]. a% W* B0 V4 I- g
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1-3 vs 4-6
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Then Weight the Third: ?3 n" J% L/ \' u) R$ {
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 8 h+ ]; T+ X& T9 B+ k, q1 j

! Y# R1 H, Q4 {0 o% y! Z2 X; bif 4=5 6 is the fake one : ^1 _  Z. S6 p: f/ X- X, _; I2 r* A
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if 4>5  4 is the fake one
; j6 D& J6 H2 S1 ^" _; q. D$ vand so on......................

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問題第二步
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Weight 1:  1-6> 7-12' F' f7 ]3 d$ u9 m
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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5 D$ E9 W* S/ V2 T' Y你第三步点去搵 7-12 边一粒???
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問題第三步' `* z0 I+ t6 m" B# a

5 |  x; W' i: K, W- r; }Weight 1:  1-6> 7-12! g& }6 P5 j" i! W% ~$ u& \( z9 m% x
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Weight 2:  4-6 > 1-3
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2 h* Q% s7 _. r" b' h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