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% B. _5 E. O+ [" f) B, L
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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)。' I0 Q6 }' k5 }# K& F, Q& i
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？』$ q, n) @+ }6 S2 i3 I6 {
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注意:
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! S) r9 W' N0 f' V0 a1. 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! G" O) ]) G1 ]
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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( z9 E- u. [# ?

9 `$ m' ^7 n3 e; O* Z: \$ a: y  g[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
% R8 Q6 ?! [. w+ n) y1 s相信e條題目都有吾少人玩...

: r6 l; d* U  z. \" I! P我以前畫左個chart去答,
9 a4 @0 }) y9 q1 `等我搵下仲在吾在- j+ ^+ H: l; Q- d" m

& K. r6 F' u# N) R) e1 f6 B6 L+ j' }當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 C; C# t) ]) m& O: e13.........
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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:7 a1 |1 T+ u1 y

8 o: E# w1 ?% }我以前畫左個chart去答,
; P, I0 {0 x9 J9 O2 T& r- {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:
) D- E! l+ a8 x" I2 J唔識隱藏...已經諗到..

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sor !!!....e加改左! R) a! E# ?& h7 z' d
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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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( I! X! s- y9 R  Q/ m) y1 I$ P[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:# a- U8 @+ a( z0 |3 B; Z) n0 D
相信e條題目都有吾少人玩...

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7 }) u9 T+ Q" m$ r! x" aPlayPlay, 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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- O  U" _: O0 B+ g: W. a3 SThanks

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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
9 T% R$ k: Q: I/ k) Eif 1-6 = 7-12     13 is fake) i( s* J7 F7 ]2 r. W

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Weight the 2 time
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* u% k+ f+ x7 @+ Q/ C% P6 \! CSuppose 1-6> 7-12
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1-3 vs 4-6
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* a, `+ R1 U* J  }5 uThen Weight the Third+ r# m% G; |9 J
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Suppose 4-6 > 1-3
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8 B) t# ^8 r; d# |1 zJust like the first Step; g0 S4 N% L9 L( _. Y- b& m5 R

% ]2 |  d* H: U+ o! i/ O4 vs 5
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: o$ F& l7 l5 b( x. Bif 4=5 6 is the fake one 0 _3 x) _9 }* K
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if 4>5  4 is the fake one
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6 u; s# H& u$ c4 N; g. Oand so on......................

hello1997

分3組4隻波子秤$ b7 @' B* e5 y# T6 l$ ]& C
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Group A: 1,2,3,4; [$ c. s% q: z+ C
Group B: 5,6,7,82 b5 h) Q( b0 Y1 M/ ]
Group C: 9,10,11,12
! ~$ ^! Q. e$ ^5 b2 \$ kGroup D: 13
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Round 1
& o  O% Y4 M: f" u' fGroup A vs Group B  `0 G" g- g& g# \; x+ z
如A and B一樣, 即較輕一粒在Group C or D' Q+ B$ }' V* f$ A, o
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Round 2/ U: q) _# f/ A# ^$ d' Q. T
再在Group C拆成:
5 d& a+ ]( y6 Z4 x) X+ A" fGroup Ca: 9,10
" }: g8 E! P4 ?! Q$ zGroup Cb: 11,12: {$ B9 y% e- Y; ]  B, V1 c
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,
7 C. \' ]: |9 v/ L/ V要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
6 C/ U7 j1 g. _- HRound 1
6 H3 `  o1 C; r1 o8 t' l4 \1,2,3,4 vs 5,6,7,8 = equal
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3 M+ W  {2 w( ?3 c! B. w$ V7 `, pRound 2( x4 D! s1 W; c
9,10 vs 11,12 = 9,10 < 11,12
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( w% s1 b6 E% B* E# g' t) h" URound 39 [( @- D" ~! v& W" L' x1 K9 l
9 vs 10 = 9 > 10
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The answer is 10.
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e.g. #2 假設7為較輕的一粒, P  t6 z' H! A9 U
Round 1+ X1 p% [. M" Q% U/ J, t# [
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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. g7 X- ]' c0 [! O* _Round 2" v) C( A7 H3 I1 e6 }% p) p. Y: U
5,6 vs 7,8 = 5,6 > 7,8+ d5 |: W2 u' v  n, k6 ~

' n" w6 a' d7 t( B# B: Y7 r. vRound 3
; h; C' L& l) v3 s. n2 @2 }- P7 vs 8 = 7 < 8% z4 W* U' Z- G5 v# F

; C5 B7 o  E# J- ]+ nThe answer is 7.$ a3 r: b  a# J6 ?
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e.g. #3 假設13為較輕的一粒
. t1 h! D5 y( }( wRound 1, P% _& \( T# j5 O
1,2,3,4 vs 5,6,7,8 = equal
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8 ?2 f1 C7 [' }+ X6 g2 t! sRound 24 [% z/ I/ o( }9 S7 f
9,10 vs 11,12 = equal3 d5 J3 c$ @. x% @1 w

1 A2 ~% j  d. A) _9 r# _* FNo Round 3
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The answer is 13.
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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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1-6 vs 7-12( A# X/ A: V6 j5 V( H1 m: U
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time , j  Q( L0 o* g. ?) f

( g6 |: Y5 C( r2 C' E; S) WSuppose 1-6> 7-12
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! s5 k( O# L6 s. h$ q  }1-3 vs 4-6 4 ~) `( @# m( ~

5 ?; z: d9 Z+ R* \6 x5 ^! g$ Z2 \Then Weight the Third& v% ]; [6 @/ x8 p* ~/ u$ V  p3 [
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Suppose 4-6 > 1-3# y: B4 v0 P6 k% g$ h
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Just like the first Step7 l# Z4 T7 P9 \2 D; }. j6 x
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4 vs 5
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' @. o. Z9 [$ S* a/ B# M4 ?: B: Rif 4=5 6 is the fake one $ X$ ~) r* _$ F& ?0 k! h& x+ s" h
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if 4>5  4 is the fake one 4 \" `( v* H& g% r7 F8 H. Z, `3 [
and so on......................

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6 a; Z) q- G% C* t. I問題第二步. s2 d0 z( M( r8 N  O: I
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Weight 1:  1-6> 7-12
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% w# g, d# u* m6 hWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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2 T+ U" H$ Y5 f+ j2 v2 m7 v你第三步点去搵 7-12 边一粒???
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/ r  F) d2 r+ M/ r& e問題第三步/ k% Z  p- U& J1 g
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Weight 1:  1-6> 7-12/ z, Z  Q! d9 ?" }+ O

  {2 A* R+ ^& RWeight 2:  4-6 > 1-3 . q+ J4 u8 K4 U7 E3 G

8 Y. A" o8 r% D5 l- G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