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3 w$ i% s2 f) a! v: E

9 _" c2 J% Y5 b+ c7 _『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)。
5 p) d5 c# \6 t* k$ H0 a" ]4 E% u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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. e' T# ?0 s5 H& O: A+ N- A注意: " j/ e/ ]7 W& s* H1 G/ ]) }& @
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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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: \4 z& n2 k/ ?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+ _4 y# }7 j) J' d

4 N; q! w5 H5 u' E( D' m$ z" T[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
* I( P2 c" ~9 l9 g# H7 J+ g$ k相信e條題目都有吾少人玩...

1 o' }. v3 O- B' D3 i2 K/ }3 C我以前畫左個chart去答,$ V7 u) e$ a  Z+ `# g# W
等我搵下仲在吾在% x1 I; A* T1 b) k; ?& V  M! ~2 ]

) r1 D1 N+ `6 Z8 g4 r當日用左37分鐘答１２粒波子，差７分鐘才合格。8 T0 Q! {5 E& U4 w& E
13.........% \- W0 M. _. _1 R  @

2 p; Y6 h; m4 f1 b3 N0 J[ 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 K& i' y; ~+ M  r  L
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:
* Y) |3 o7 I' R& K( d唔識隱藏...已經諗到..

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* f; O4 _' P2 _; l1 S% r, l" n  x2 p  Hsor !!!....e加改左9 b) N% N) `( p
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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# s' L$ t8 s# H% J
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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:, C- X0 N' Z- G- Y+ {& K
相信e條題目都有吾少人玩...

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* c7 E/ l' X' n% R. Y9 V2 t/ XPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 x$ k: F) j/ q2 f# J0 i
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:- f2 R3 u# l2 O
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5 @  Y( z' \  @PlayPlay, Let me know later who has the right answer and I will add points accordingly.- v: y6 P/ K# ^3 d, D+ R
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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.
! ^5 n# v9 `/ m9 v: K& R1-6 vs 7-12+ |' s$ V$ W2 j9 O# x4 N) c: X( _
if 1-6 = 7-12     13 is fake
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6 M9 y0 M. L+ K& y  y. ?if not $ n) H+ {2 `0 i2 X. n
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Weight the 2 time / F: ~' r8 S% e) J8 @  c) z- `: H
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Suppose 1-6> 7-12; R3 Q& ]" N. k1 _0 s) f9 J* f

: R* x( n6 l& p, o1 L' f4 ]1-3 vs 4-6
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( z" O, u0 h" j* `% q, L- b$ tThen 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
+ [5 L/ Y3 }, k8 o/ u7 s1 s" }$ ?; s
" }3 p& I6 ?. `% c% Xif 4=5 6 is the fake one
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/ [+ f; O* w" T# d4 oif 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
5 K: T/ w0 ^7 d) V7 C  ?Group B: 5,6,7,8
$ A9 v8 ?" s4 S+ {! c& `) u) `# ~Group C: 9,10,11,127 y% y- [1 f3 _8 K6 I
Group D: 13& k' d. k0 Q; {5 J( R% T
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Round 1. c/ h; ]% Z; w# e0 b  M+ I
Group A vs Group B
/ @5 U/ H) u+ j9 q- G5 d如A and B一樣, 即較輕一粒在Group C or D6 c8 P3 b. N: @' f& b" z

3 R$ N( G! Z$ c$ qRound 26 b) E, P4 m) X% p
再在Group C拆成:
: i; Q7 W' V, g$ KGroup Ca: 9,10
/ |. [8 l" B$ y' \1 aGroup Cb: 11,12
: I* W: G- W- `! @* h2 y6 L8 O6 g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, ; \$ s$ E7 ~; E' e2 |
要再秤, Round 3, 之後便知答案.
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/ j' I+ {( H+ K4 ^e.g. #1 假設10為較輕的一粒
( H7 p, v1 K4 u- W( RRound 1
7 H+ }& s! x- h- x; W, _: q1,2,3,4 vs 5,6,7,8 = equal7 m2 u( Q* _# }+ {3 t5 Q; Z
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Round 2! k8 z; W8 [0 `
9,10 vs 11,12 = 9,10 < 11,12
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Round 39 h( s6 U7 I1 G9 F! ]5 G
9 vs 10 = 9 > 10
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! \$ \5 y( N0 l7 v# F  _The answer is 10.. Z2 m0 k7 g$ F) _+ x$ N2 Q
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e.g. #2 假設7為較輕的一粒
% g6 K7 Q' x7 b. R6 }Round 1
: ?+ f- J: f, @& @1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
2 n. w3 A$ I$ L+ e% b8 \1 P5,6 vs 7,8 = 5,6 > 7,8
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9 _+ ~% j( T  y+ mRound 3
) N! V6 |" t7 H, T" H4 L" j7 vs 8 = 7 < 8
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6 r8 D) Z1 [4 @8 G; EThe answer is 7., a0 J' T2 P% Z. N+ F) V4 c

9 r( n3 T  k1 y% f: R+ A  xe.g. #3 假設13為較輕的一粒, q: k0 k1 L9 j' i" v
Round 1
. k6 m( k' j- s! W: {" z1,2,3,4 vs 5,6,7,8 = equal0 E' n: d& ]9 L4 t3 @

) `: f  Z% \  y: j; }2 URound 2. I: K. ~  k( c
9,10 vs 11,12 = equal3 g2 B& P6 K& O# e
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No Round 3" @; u5 y+ i4 ~* D# N- e! [

) ^; w( s, P' p4 l9 q7 sThe answer is 13.$ o# }$ U% n2 g0 `# \

8 |# h: t7 P0 n唔知我答得正唔正確呢?! 3 i  ^/ N9 F- F  ~# @3 F' V

# s- g- L9 ^& d/ g[ 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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) X7 l2 @& O+ t; p& X1-6 vs 7-126 k8 t, F0 ~) E- S# p7 v
if 1-6 = 7-12     13 is fake9 m1 @, v7 T8 R1 ~% U
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if not 9 Y8 L2 }! d, E* S, I- d
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Weight the 2 time + M+ Y& x8 E0 I
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Suppose 1-6> 7-12
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1-3 vs 4-6 2 {+ _/ H7 G9 [7 o- ~) k  ^
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Then Weight the Third; E! E# ~) J; a2 d) `
3.
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5 _0 _( i5 U: ?6 V- r& E1 j5 HSuppose 4-6 > 1-3
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6 ?2 p& t: X; m8 y+ y* y* VJust like the first Step! W$ X" B4 D7 a6 o0 e" q4 V
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4 vs 5
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if 4=5 6 is the fake one 0 d( Q" |) S+ Y! p5 @
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if 4>5  4 is the fake one 8 T9 ~* x: ?0 G1 B% ?
and so on......................

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問題第二步! J( ?: g' i4 u8 U0 ^2 b5 U

7 F5 t; H( e9 ]  M& bWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6+ w1 Y- s( P; x1 d, r" ?, H- M1 o! v

' s. |5 C4 S# M你第三步点去搵 7-12 边一粒???
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2 Y8 ~4 _. X! E) o1 X- e: h問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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0 h3 `0 y6 y1 ^6 P# b% Z8 V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