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- i' O/ Q) P- b& s- d

! C! }- X: c4 k' o' b『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)。* y" \9 J4 X4 f  n# H7 ]9 [) 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？』
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注意: 2 `' a9 O; B. s( L; V9 W
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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
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2 E5 i+ O: n+ S2. 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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6 A7 P% u8 T  r- b. E[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
# _6 l' F7 ^" B, ~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,3 s7 `4 q0 R: j4 ?
等我搵下仲在吾在
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: n5 [/ [; U$ m# g& G當日用左37分鐘答１２粒波子，差７分鐘才合格。: T: a8 ?* v7 d+ x1 n+ ~" V& F' s
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:9 S' p8 e1 G; e
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我以前畫左個chart去答,$ \; U! b# y9 m8 K
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:) z: K; ?6 f) J: V( ]& S" _
唔識隱藏...已經諗到..

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4 l& o8 o) C5 }* Y; Lsor !!!....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:
& i4 q2 {3 c$ [相信e條題目都有吾少人玩...

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- ?' E- G1 g( g% R" P5 RPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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0 e- a$ v5 \6 i( A( nThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% X& h. b* w6 g

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" a9 I" t1 f$ @' P# k8 B! BPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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& k& R/ h0 V9 V* ~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.
9 D% s* [# ?# R6 A3 M0 Z1 h1-6 vs 7-12
+ }8 K/ A2 j$ B* Y4 yif 1-6 = 7-12     13 is fake) _+ y! Q. V' c

+ b# a% m. T5 Q: I7 g2 i% Fif not 5 a' F# U, v( X* o" |) `
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Weight the 2 time
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' f5 t$ ?9 L* E1 c, \3 lSuppose 1-6> 7-12
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+ m$ q# C6 T+ \) b: I1-3 vs 4-6
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) x- ]. u# g  N# e5 u* a2 {: J3 ?Then Weight the Third
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! y1 b& m4 y. K! A" W) G/ PSuppose 4-6 > 1-3) {; C+ f1 m# J% ?- O
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Just like the first Step- }9 S, }$ J( `4 p" S
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4 vs 5 4 R, m6 F/ {3 d; @0 v$ _
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if 4=5 6 is the fake one # n' `; s8 _) X" m, u* {5 _6 A
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if 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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Group A: 1,2,3,4
; h7 M4 X% B  A+ w1 i4 P3 \Group B: 5,6,7,8
. _4 Q7 t# r8 j8 N& r% h# {; k' K% JGroup C: 9,10,11,12
% {- y; }/ M1 V+ r, D' AGroup D: 13
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Round 1
0 w+ J) o8 ]' A( G. f, V9 z3 bGroup A vs Group B2 n% R! C9 ?: ^( q7 z
如A and B一樣, 即較輕一粒在Group C or D
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8 c: Q9 S, c  [  g4 Q' \Round 2) X8 `$ B3 q0 p& P1 h7 x
再在Group C拆成:% _: m, T$ M2 a& p1 E% x/ Z
Group Ca: 9,10
2 o* T/ S$ \1 l& b; c7 ?Group Cb: 11,129 Z6 d) I& o9 v2 Z/ A, q' d9 x
然後再秤, 如一樣, 即13為較輕一粒.- o& p5 v! v( J6 a; F1 \

: H3 J, r' L/ @* p- F: Y如不同, 即較輕一組有一粒較輕波子在其中,
5 ?% q  f& y! s5 B8 }8 p# T要再秤, Round 3, 之後便知答案.# W, f3 o: S3 V- p* p" k$ |

4 c* Y6 I2 w! n. {. We.g. #1 假設10為較輕的一粒: v, H" L" R2 ]0 Q0 t8 J
Round 1' r0 T4 s" x* o$ F
1,2,3,4 vs 5,6,7,8 = equal
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) h* r; f0 ~2 u. p4 O1 x4 }Round 2
9 z4 |+ p$ X) b- p. p9,10 vs 11,12 = 9,10 < 11,12
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& i: D1 j4 M/ K$ d1 E) B4 }) NRound 3
( i4 C7 ?( n, o- V  |2 w9 vs 10 = 9 > 10
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The answer is 10.
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! ?% F! [# |+ g# ve.g. #2 假設7為較輕的一粒. V* u' a4 b8 U* K
Round 1
. J3 F9 U# D7 K/ [! O1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8( k5 y- M. q; x2 \

' ^0 e+ W- C4 a2 j; kRound 2, b4 Y- x4 P$ z+ L" u
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
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The answer is 7.
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9 e+ z4 Q2 A8 }e.g. #3 假設13為較輕的一粒
& V1 [. t) `% L: J, }# S( \; G8 I" Z' pRound 1
7 I$ d' |, q+ e3 U+ t1,2,3,4 vs 5,6,7,8 = equal
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Round 2' U/ B) k& X) Y
9,10 vs 11,12 = equal, G. ^2 @6 @0 [# L/ u& ^

" J( M2 \3 m/ ]$ K' ~: b0 W4 bNo Round 3
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: c; c6 ~) t  M+ wThe answer is 13.1 L) h! B8 U7 ^3 T) @) |

+ B- b: k8 l$ v2 Y唔知我答得正唔正確呢?! 0 l. s* z3 S3 m" E1 t+ q. a

8 _0 @. e: W/ d3 H4 o, ]5 ~: S[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:0 F1 e: X7 v( F' j- D
1.
1 V2 V; p* \' j5 J* m5 M5 x* B1-6 vs 7-12+ o0 C0 q, b4 W( a% a3 \$ j
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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$ X: |% @. i* ^$ e6 \5 \Suppose 1-6> 7-12* F3 }2 G+ ?  c9 z) ~. Z8 V* p! ?
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1-3 vs 4-6 9 T9 b" N5 f  w& c4 R/ ~$ X

0 T5 H6 y% ~  [( R; fThen Weight the Third
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Suppose 4-6 > 1-3: K! _% V% C, X. Q
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Just like the first Step! y5 L! G) O6 D( @3 R1 t

+ m, W" X! |2 b) S; [4 vs 5   o- s  C  A' g
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if 4=5 6 is the fake one ; u* U5 T  L  {
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if 4>5  4 is the fake one - Y# U5 N& y1 E& i
and so on......................

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問題第二步
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4 a' u9 a* I5 R& d7 V: S7 H; w; rWeight 1:  1-6> 7-12
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! k- ~* @" z1 M; EWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6- A. A2 ^* w$ k! H! J- b
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你第三步点去搵 7-12 边一粒???# h' D  S! d6 L) P
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/ }/ t0 q) [. z7 r9 c& d問題第三步
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Weight 1:  1-6> 7-12  q4 n  }# j& H4 |  v
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Weight 2:  4-6 > 1-3 ' D' K' L7 `6 a3 l; ~+ V, @
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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