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% Y% d! Q1 M. ?7 `! t2 `

' V$ Q* O! c% V, v) w『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)。
% T/ X, E$ s  O2 k! }6 L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？』% i. L1 A! Y& h+ }# {7 D8 @5 Q
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注意: " l/ @9 H! H  n0 M2 I7 ?" u  e) }2 v; v
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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' R7 i! D3 i+ O( F* a. ~

; P0 z9 G$ f% o  g, [+ F2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:( u  N1 `& ]5 F( a2 v
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,
4 |6 M0 n' k. V$ b% w- P) W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。
$ u0 x0 A6 I5 s" F: F" o13.........
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, b, y1 y6 y* t+ w% Y* `" m- g1 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:( y8 |" L, B, `) w5 t

; v  n( Q% b7 O4 \我以前畫左個chart去答,* E; V' [4 U! b6 {7 S; K: q3 c! T! J; e
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:* f' C9 ]# G/ B# o6 ^* n# R
唔識隱藏...已經諗到..

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sor !!!....e加改左
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  e* |0 e3 I- i; W3 O2. 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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& @/ N" g& @  x$ }4 ^' D* V6 S[ 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 m0 s' W, U/ e+ I8 q! C
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.
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Thanks

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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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.
' T& f7 F; s; j" E1-6 vs 7-12* V, ^. r- o  e( _4 G8 H
if 1-6 = 7-12     13 is fake: O$ d9 [3 U9 e/ _( u
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if not $ a" h3 G% K& v. u

6 [$ R( L/ }: [; x; Z* |Weight the 2 time 2 [, d8 m$ C  h* r% s1 z+ l/ L, y

7 n% R" @- J( q# A2 `% c: |Suppose 1-6> 7-12/ Y$ ?1 q9 ~" }4 h# \

9 T" I  g4 g+ n) o# o+ |1-3 vs 4-6 " a+ K+ n/ G9 \

; l- m# o) N0 I2 a: BThen Weight the Third
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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 + y6 r0 t! H, b. O+ f4 }

  S/ G+ I# U( I3 k. p9 _2 jif 4=5 6 is the fake one ! F& O( m& m8 [
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if 4>5  4 is the fake one " q3 U1 K1 q% D0 x( {- _" p! P0 `% B

  f) n" U- J  r/ l3 v* g* vand so on......................

hello1997

分3組4隻波子秤  i7 T, p8 s; ^6 M. o3 I& |
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Group A: 1,2,3,4
# m) {$ z" Z3 J' u* xGroup B: 5,6,7,8/ \3 }4 k, i+ ]$ G% M* z# I5 E& N
Group C: 9,10,11,12, g" h- r$ @' O6 o- s/ Y+ r
Group D: 13
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Round 18 ], T& X; s* _) O4 e
Group A vs Group B
/ r2 ~9 F' P. x% V! k! i如A and B一樣, 即較輕一粒在Group C or D
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Round 2. b  K' f4 a  |; C6 k/ E
再在Group C拆成:
# y# H- I( L3 S# B2 a9 q; x8 n8 ]Group Ca: 9,10
$ A: j7 P: w1 [  N3 F% JGroup Cb: 11,128 I& X9 H  [+ y7 E
然後再秤, 如一樣, 即13為較輕一粒.
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, J1 ]# W8 E6 u# r  _如不同, 即較輕一組有一粒較輕波子在其中, - Y( D# \3 `4 K$ G
要再秤, Round 3, 之後便知答案.* t; B7 a, e3 ^* X# X0 k
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e.g. #1 假設10為較輕的一粒
& e  T) m9 |% p* ]2 kRound 1
; Y5 N" X( w9 [, l1,2,3,4 vs 5,6,7,8 = equal: d. T4 s6 l8 E7 C, z  B* k
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Round 2
$ X1 \0 G9 }2 i/ a. ?, B" n9,10 vs 11,12 = 9,10 < 11,12
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; @7 I& ]3 u9 R1 q$ \Round 3
) ?! Z5 K6 J1 N; s0 b- b9 vs 10 = 9 > 10
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5 _+ n% |! Z: k& e2 w# H" h9 @The answer is 10.
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5 O0 L% i% E* x% J/ c5 P/ @e.g. #2 假設7為較輕的一粒
/ y1 y2 z2 W6 a. Z' T( ]Round 1
$ a! a5 o# l% I6 t; b/ }1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8- H) C3 P# @5 C+ g0 ]- C% T3 ~
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Round 2( }1 Y& n% r& O$ W) H
5,6 vs 7,8 = 5,6 > 7,8
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Round 3) s" z4 s& y% W+ v0 d( e
7 vs 8 = 7 < 84 l6 e& K6 n# k! D' D
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The answer is 7." c/ o8 M2 q  _, q! s5 k
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e.g. #3 假設13為較輕的一粒, N! x" M4 \! n* Q  U
Round 1- S  g- \3 @; G- u; Y: T
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
! b7 P  l$ j- M  u$ f; G: w9,10 vs 11,12 = equal) U+ ?! p( N2 u" _% X: p* A

0 C" o) E( H" v: oNo Round 3
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3 w# }' ^) W5 D2 VThe answer is 13.' A6 r6 U2 J$ Q4 k( d1 a- L7 K
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唔知我答得正唔正確呢?! 6 A5 ]% Z8 g) B( [" ?8 y" L5 J( A+ @
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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:% I/ H6 O0 B9 X
1.
5 @. ]$ }. |9 H1-6 vs 7-12' j7 j% `3 p! ]2 q* m
if 1-6 = 7-12     13 is fake$ n2 V  i$ ]4 g: Q2 W+ ^
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if not / w  a- D8 g- Y$ `3 I6 I5 ?. i) C3 L% n
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Weight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-34 f+ D$ K4 ?" {& C4 T; s0 r& _; F

1 }$ Y6 }6 }+ K% y/ [7 |' [Just like the first Step
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. P7 s5 _# u* W* ]4 vs 5
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% X' L% C- ~  L$ ~% m( q+ u  Lif 4=5 6 is the fake one , V9 n8 E* i1 k
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if 4>5  4 is the fake one ! s# [+ K6 r0 ?8 V7 V3 k0 M- P
and so on......................

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' u4 Z8 e7 K8 n' y" q5 o6 l問題第二步
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Weight 1:  1-6> 7-12; S0 F# U6 z: r: J: t# Q

% q: G' o' f+ A% [4 l* t, p: WWeight 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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: Y: i8 R0 X" n" @0 N3 E) s$ {問題第三步
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7 u8 O* R. j1 j) l- H  A) `4 j7 MWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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; G! N5 l5 T. L/ U$ A, d5 G( d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