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5 Z0 T% D4 M" t7 A/ k% J
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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)。8 K- W. S1 Q$ Z; P4 x
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- ^% D- Z- ]. a. D

* J2 ~9 p* H2 H0 L7 U注意: % `: X3 A+ _  C+ 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2 \0 l) u7 H1 U- P

* f+ `6 \9 Q, c# E" s" P2. 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8 ^! l# {8 o: B* B: \, ^6 N+ P" `
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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 21:34:0 ]0 d3 w- A7 Z) s5 t
相信e條題目都有吾少人玩...

# i0 s! P" R0 Y我以前畫左個chart去答,
$ w2 X$ s  m( Y) X" |/ e' q等我搵下仲在吾在
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- d0 T$ T0 X5 h3 T$ u當日用左37分鐘答１２粒波子，差７分鐘才合格。
7 O9 i/ G' r& z13.........
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3 J" Q3 I. Z& L: [8 W[ 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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; x9 Z8 y7 o/ ?" a  J2 k, H我以前畫左個chart去答,3 M0 U- g6 U; H
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:% p8 y) y6 F: o
唔識隱藏...已經諗到..

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2 y' \- W6 b8 X; W7 p1 Ssor !!!....e加改左# D  _* P1 y) }1 F9 M

) l" N8 g1 T" C  X3 b2. 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* j0 F- y. p1 a: j$ a+ Z8 i
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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:
  }1 A6 _+ K1 r4 ~) S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.. ^' O5 F% e" j& G* a3 p
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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.) m8 g" E9 W" F5 L, |$ [
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Thanks

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4 L& R; U3 Y+ O4 ?" ?8 H5 r# r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& h5 r8 s# }7 R& V( c" }0 y4 u
if 1-6 = 7-12     13 is fake- P5 x4 F9 E" `% w7 D+ G: A
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if not
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Weight the 2 time " P$ N' k- r0 D$ b
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Suppose 1-6> 7-12& Z7 k' c- Y' Y, \: ?/ Q$ F5 X7 V# q

# ^) b# o1 ^% q& A* s! L$ U1-3 vs 4-6 0 Q- g" R! ~4 ]; f" `  I
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Then Weight the Third
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% _' Q) j5 b" A% sSuppose 4-6 > 1-38 Z3 L% d' v9 `+ d

  ~" @4 O" b3 K( G  k" H0 n" OJust like the first Step% ^. u& \! ^: d+ R

9 N4 J, n3 l5 |6 }7 z7 c4 vs 5 ! U9 v+ y& Z4 K1 X" H
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if 4=5 6 is the fake one 4 b4 Y; V. g$ e8 x* i$ @

( _6 p& F/ ^) ~if 4>5  4 is the fake one : u1 [' p! i. N" n5 |

: L1 F0 {" U7 D  F" m7 ?and so on......................

hello1997

分3組4隻波子秤# l; A2 V  N6 ]' D: m; X
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Group A: 1,2,3,4$ r  \# {# D- p
Group B: 5,6,7,8+ I9 c0 X% U7 I* W! E0 p" i7 Q
Group C: 9,10,11,12
) j; X/ O1 |$ J3 R$ bGroup D: 13
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Round 1: z2 G: r; l) c5 E
Group A vs Group B
0 m3 y+ |  R, d如A and B一樣, 即較輕一粒在Group C or D% K4 V& _3 K% n- I+ b

5 D$ T$ j3 e( qRound 2
- k  [2 {5 P2 ?2 L1 D5 A再在Group C拆成:1 g5 @" o+ c" @, C
Group Ca: 9,10% k+ G. M. Z; H0 f3 ~7 f
Group Cb: 11,12
- Z/ l) q1 E2 H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,
0 T- \- a# k) |. T! h, k要再秤, Round 3, 之後便知答案.
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# {+ G2 ^" U" Y/ qe.g. #1 假設10為較輕的一粒2 l' b. o: E# j1 Y# R& Q. ?
Round 1$ l- F& a9 T% Q- u1 A- m1 `7 ]
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
5 Z# O" B. b; O9,10 vs 11,12 = 9,10 < 11,128 D7 g( F0 j" e3 W
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Round 3
! M7 j+ Y* v4 X* }% [8 h% _, s9 vs 10 = 9 > 10: C- ~: a* f# }
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The answer is 10.
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$ h; M  b( D# B" D; Ae.g. #2 假設7為較輕的一粒
" h/ P* O9 c9 h5 X6 wRound 1
, H! @( L# y1 w% f9 Q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; b/ Z! b" x9 ?& f$ K

% v  e, ?, x" [% W3 a+ ^Round 2
( a7 ]' J1 @8 ], }+ E5,6 vs 7,8 = 5,6 > 7,8
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7 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! }4 ^. W# P  `: k7 i. A
Round 15 W1 t' w  ?) E- M8 J# C5 y
1,2,3,4 vs 5,6,7,8 = equal* v* D& K1 V. I1 V( @0 K' T5 w6 i) N) n

" W; ~0 k( t: d6 X0 @0 o8 s) PRound 2* R' Y% ]( }$ l: c
9,10 vs 11,12 = equal
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No Round 3% J; N5 Y* p0 h. Q- C

, N4 Q# _5 r# q/ DThe answer is 13.
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唔知我答得正唔正確呢?! . d7 v  F( I  z. R" p
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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:9 `4 [* U  ~& l, @
1.7 O$ ]) i. L5 K; [: `0 s
1-6 vs 7-124 v& y' \6 ~; ?$ _  b1 n) l
if 1-6 = 7-12     13 is fake
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if not 8 i/ m; E1 }' O- l/ s0 R

& V5 ]) @8 l" f" U( C" X$ T( wWeight the 2 time
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" i' T: C# S8 C9 W% x- kSuppose 1-6> 7-12
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1-3 vs 4-6
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, U1 J" R2 x, c/ o; PThen Weight the Third' o2 }4 B: A. E+ r
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Suppose 4-6 > 1-34 o9 L  M- q4 \* B+ [

& P% y/ y; [: U4 A$ zJust like the first Step& m" U" W" P  T! Y' E

; N! O  p8 ~  ]1 e  @4 vs 5 $ s- K+ X. P. F8 @: l8 G$ L' j
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if 4=5 6 is the fake one ; Z- q; U% ^& g6 `- v
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if 4>5  4 is the fake one * j) T9 r+ x$ H+ h0 |
and so on......................

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問題第二步
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Weight 1:  1-6> 7-128 Q8 k% D. T1 u( C) {2 X8 {
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6/ E8 l- b+ a) ~8 V8 Y- W
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你第三步点去搵 7-12 边一粒???
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========================================
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( G0 ^& D" b2 w0 k- B1 U. w4 o問題第三步
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3 W7 t2 v0 Z1 [$ n% p9 QWeight 1:  1-6> 7-125 [2 B/ L/ M) R1 e( e1 Q/ q' w! t0 {
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Weight 2:  4-6 > 1-3
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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