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
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9 `9 r- M" P( q2 }$ R『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)。
' @: a, L9 P/ V" K/ q- Z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* z) F7 e2 _; T& C( p, a
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注意: 3 b8 `% t5 y' y. A

$ x+ U, }' X* }5 w) q$ r7 M1. 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. 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& B5 k7 Q* s' \( K
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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:$ ?- ^! [7 W+ M
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,2 r9 v, F" M/ Z5 Y- U9 K
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。7 [1 C( I' ?' N
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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我以前畫左個chart去答,, [8 G; y( i3 [1 f
等我搵下...

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5 t7 C+ u' j* v6 I$ ^+ k7 U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:
) e! U1 K7 q, B# s唔識隱藏...已經諗到..

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sor !!!....e加改左- P6 ]1 h: |- h- S# `
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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  P# T# f! C- J! W6 K, N
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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:! x9 M& Z. f1 Y2 W, U
相信e條題目都有吾少人玩...

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! S- Y* @1 r1 ]; |; ?( j1 d' ]$ JPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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; ?9 F& T. c8 y# U9 x- nThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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9 }1 ~& l* L' v/ @2 X% Q& qPlayPlay, Let me know later who has the right answer and I will add points accordingly.# c/ L) t1 `4 S' `1 a  _6 j$ o
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Thanks

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  Y& |% [5 x" i; G8 z% P6 N不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
+ ^. m9 B% l1 X) `! j1-6 vs 7-12
$ {1 X6 T% x7 R" ?2 @+ Mif 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time ) \) a$ N/ G! i, @  O4 A
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Suppose 1-6> 7-12
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2 e' c1 T5 d* |1-3 vs 4-6
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8 ]) o# b0 y- I/ }) cThen Weight the Third
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Suppose 4-6 > 1-3
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* S1 r0 k/ f. {/ d3 G5 hJust like the first Step
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/ a3 E5 n$ R4 V# ?+ W+ X: x4 vs 5
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if 4=5 6 is the fake one # b0 Z6 g  e; y9 ?" P" C6 _% @' a
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if 4>5  4 is the fake one " p4 w) U8 d5 t6 U
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and so on......................

hello1997

分3組4隻波子秤
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5 Q  R0 [" ~% E5 @" N& yGroup A: 1,2,3,4( L8 w' v6 _9 I/ p% Q
Group B: 5,6,7,8& d8 ~* H: n5 H  S/ V3 h7 P
Group C: 9,10,11,12
% K  \! O" o4 a( nGroup D: 13" X7 D" F) K& ^/ q0 V" }- a; V5 |

. v* I/ h! @5 b$ @! aRound 1! n: b' V5 m* U$ t/ U
Group A vs Group B
2 O" k( w, i: ?/ g3 l5 V如A and B一樣, 即較輕一粒在Group C or D8 A! Z. U- ?* R% q4 E2 J+ h; ~

0 M. I# {- J* M! {Round 2
) ~! S1 _& }9 G$ r$ P$ Y; V# L再在Group C拆成:
: S! p* _: E# _$ m! K% G9 BGroup Ca: 9,10- S5 N5 Y8 o1 W' P2 t/ E# F5 M
Group Cb: 11,12* h$ e& ]3 E  Y! e. B
然後再秤, 如一樣, 即13為較輕一粒.
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/ a7 G- t# s' u# |  A6 `. o如不同, 即較輕一組有一粒較輕波子在其中, 2 E/ E- \/ ^- B4 N# l6 X
要再秤, Round 3, 之後便知答案.5 P6 D5 ^: J; \) `7 _0 k7 O! F/ y

7 v; V0 s7 b- |: Ne.g. #1 假設10為較輕的一粒
4 l. V% a; T$ J( S3 h' nRound 1) P: J# D* q4 z* v6 e* K- i7 Z$ g" A
1,2,3,4 vs 5,6,7,8 = equal
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: f; G; I0 p7 K% l4 g' }Round 2
9 m0 l( L4 Q# ~5 ]' v9 i8 A% e9,10 vs 11,12 = 9,10 < 11,122 ^$ ^7 x! L" e3 M6 a
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Round 3
$ |) K) b0 M+ G9 vs 10 = 9 > 10  w0 d0 ~$ J6 u0 t. m9 m# d
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The answer is 10.6 g* Y7 E, H/ @6 W$ p

3 x6 F" J- G7 @1 [& v9 v' a5 K! Re.g. #2 假設7為較輕的一粒3 x' R7 X6 `: B7 X3 P4 D
Round 15 \/ v: `# j/ }
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8) B0 \2 X( u6 t" q
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Round 20 r, Z1 K0 R5 n$ h$ a& B
5,6 vs 7,8 = 5,6 > 7,8
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Round 35 }2 L/ q9 [- l& h% z2 R
7 vs 8 = 7 < 8  w0 X) \1 H/ B4 z" S2 Q
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
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% ^# \+ z- O% P% {1 E" m7 o1,2,3,4 vs 5,6,7,8 = equal
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Round 2# ~- |( b! \! t3 k  _0 {% \
9,10 vs 11,12 = equal3 A) q7 u, `. |9 `6 K3 }; U# h0 |
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No Round 3
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0 n* l2 T! h5 N7 n/ b7 T5 B% b; jThe 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
- A3 J+ _5 |7 m6 {  Sif 1-6 = 7-12     13 is fake
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. J2 |' [$ T/ V3 C: q& v8 z2 kif not
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Weight the 2 time 5 D6 i, |, y) Q" A
6 H5 U( s6 T6 H% y& ]* b
Suppose 1-6> 7-122 ]$ `% [6 X+ q
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1-3 vs 4-6 - ~: K/ G- `0 `

" X1 H+ \1 `- ~! L; a4 lThen Weight the Third
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8 B$ w0 Y/ b5 v) P  w
Suppose 4-6 > 1-3( L( X* j! z$ [  L8 L
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one ) Z- x& ]: ]$ h9 b

' X3 m, q, e5 ~; @8 M/ m  ]if 4>5  4 is the fake one & p; {; ?: k( I2 n2 K# V# z8 x7 B
and so on......................

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問題第二步3 B- D: ?0 l) i$ X% L

4 X2 H  E& `; J6 ZWeight 1:  1-6> 7-12
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3 ]8 o8 ]2 X( N" Z* y; PWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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! Y7 w1 \( n" ?5 l* \; a; V你第三步点去搵 7-12 边一粒???5 w, u6 `+ n8 O, P4 P

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問題第三步' r& L3 N$ v: _* q0 S& w$ j

( N8 `% K; I9 U6 [4 cWeight 1:  1-6> 7-12% F% C. P0 U; c" f

3 O4 o5 Z  M9 h8 NWeight 2:  4-6 > 1-3   Y" r; Y+ Y  d, {0 p

1 B$ \9 b6 G6 |0 _/ i3 _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