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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『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)。
1 d: A, j- Z9 f7 S4 }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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. K- Z' B& o- {6 v注意: & ]* }3 i9 D4 X$ Z, b! W* Y5 v7 f
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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 ?8 M7 H  R* R) ^: V# l2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:+ _& `. ]- 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,
/ W0 P! J8 a2 p( l- u等我搵下仲在吾在4 V. Y& }( `' l- }7 Q2 v2 N
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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' o# m% y+ y. Z, p$ p8 k[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:$ r, N+ H! K- l  N: ~! @
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我以前畫左個chart去答,- O+ x$ H$ M  O! y9 V5 ?
等我搵下...

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* F  T2 N7 h0 x5 {5 o5 r! u! p9 L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:3 L: S$ r6 ?. x1 |) x. x
唔識隱藏...已經諗到..

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; H9 `4 `& {& F( t; ssor !!!....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, T5 x4 u" v$ d. z) P  S7 g

- t. P; l( x% z% }2 b- T6 b! c[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:3 l4 V! \) [" f" {
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.
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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.% U+ ^% H* K, f% k. Y

8 T% y3 S, }; D/ dThanks

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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.
! l) Y5 O( e) z- l1-6 vs 7-12! u8 O; M; ]. v3 n% {- s' [
if 1-6 = 7-12     13 is fake6 W8 A+ t; I% [; N0 a

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  I2 [. f7 v. LWeight the 2 time . v& @" d! G6 `, R! Y9 T
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Suppose 1-6> 7-120 C/ N4 w1 g) B5 O# h' L. V/ P( J

. m/ X9 E0 E8 ?$ T7 b" |" E1-3 vs 4-6
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Then Weight the Third6 I0 c  t$ Z  ^: t: r+ }
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Suppose 4-6 > 1-3
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, n& e/ N5 ^+ v; CJust like the first Step+ `+ n# w, |" j, S) W  @, ?
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4 vs 5 7 H! d: ^4 w/ j9 U; `' z

6 t( @  I* z/ m' D/ S  w, Fif 4=5 6 is the fake one
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9 s8 a* G2 T5 v; Lif 4>5  4 is the fake one
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* Z8 R  s  x) k+ I! X0 ?  ?- n. Wand so on......................

hello1997

分3組4隻波子秤
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" j, |* E- h8 s; sGroup A: 1,2,3,4
2 F# t) S: [6 ]" V$ D/ f& Q9 qGroup B: 5,6,7,8
* P( X8 @4 @$ ^( Z6 j# E4 r; e( @- X' hGroup C: 9,10,11,12; \0 L- @* w; T; D( Y/ \9 E! G
Group D: 13
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) t/ J. u0 Y. ^1 Z, J' M$ Q) vRound 1
4 `/ L4 l6 `8 O! oGroup A vs Group B+ X% N4 [& B6 l
如A and B一樣, 即較輕一粒在Group C or D
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. Y+ o- f% _5 m9 o# Z: c  FRound 28 i/ e5 V1 {  r3 V
再在Group C拆成:% H% W: |# L6 x, M
Group Ca: 9,104 O1 w$ C) j" E" G
Group Cb: 11,127 W  f- y, W7 t8 ~/ V5 k7 N
然後再秤, 如一樣, 即13為較輕一粒.4 U( h. ~) K- A$ i1 m+ ?7 C
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如不同, 即較輕一組有一粒較輕波子在其中, % M1 n9 s1 v' I6 M
要再秤, Round 3, 之後便知答案.6 Q2 S' }: h% y& w+ C
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e.g. #1 假設10為較輕的一粒% R* |  `) z- k9 J
Round 16 _5 M: e* X& Y/ }$ ~" w7 I
1,2,3,4 vs 5,6,7,8 = equal
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, N1 z( i0 @% y- y' KRound 2( E$ y  E4 x6 D, z
9,10 vs 11,12 = 9,10 < 11,12
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9 g) G1 u: K5 P) r, @$ pRound 3
. z' G. S: \2 T. r3 F" _2 w- A9 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) D8 J* v- P/ ]  p6 T% j6 o* e
Round 1  J6 t# E" z7 h/ D5 ^
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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6 b& ?: U3 l8 N" o4 ]' O- f3 BRound 2
$ r9 p3 b  t$ l4 ^/ [; V, [5,6 vs 7,8 = 5,6 > 7,8
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Round 32 v; C0 ]- W: N
7 vs 8 = 7 < 82 S" T+ B- P: ?! k  I( K7 Q

3 i  p% a! Z! K3 _6 I& rThe answer is 7.
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- f* v5 N+ {4 u) Ye.g. #3 假設13為較輕的一粒. X/ ]. `2 q% M9 `* I* n7 D
Round 13 y/ W  f* A: ]9 K
1,2,3,4 vs 5,6,7,8 = equal- r' l( R0 B* m4 K  M" \6 V  C
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Round 2  T! u5 {, j  g; e1 x! H% j4 {( S2 x
9,10 vs 11,12 = equal
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3 H  ~. q* ?) R/ p; \- `No Round 31 l* ^3 v. m) S0 ~, |5 Y% r

0 ]/ ]5 `1 I+ e5 p( E( N7 LThe answer is 13.7 l2 y( l0 z# f6 E4 \2 @
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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:8 p& v# Z: S# c! c% S6 U5 t& F
1.
" ^5 e1 U+ L$ R2 V/ x! _  g1-6 vs 7-12
9 j; s0 j0 q! F0 y9 N, ]- nif 1-6 = 7-12     13 is fake8 V& E* L* v" D  Y0 E8 \! o
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if not
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Weight the 2 time . r1 r3 w# G' m# s8 `" P- z

6 f% ?2 Z* `# @' V( oSuppose 1-6> 7-12
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1-3 vs 4-6 1 _; a2 e+ N  `, N& U+ X6 |: O
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Then Weight the Third$ {& c9 z! e2 U" J, B/ U, x0 b
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  e$ `! B+ a' g- @, F
Suppose 4-6 > 1-3
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1 P+ q' c8 V% q0 ]" p$ _Just like the first Step3 L$ F& [# A. c6 M4 Q

4 W5 t, i, D3 O' u" L# K5 Z" A4 vs 5 # k" c+ n/ ?: b' N# f2 j6 g

# s& N5 D; r, G& A3 ]if 4=5 6 is the fake one
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if 4>5  4 is the fake one
# t6 s" T% {+ n  a2 W' P+ |; tand so on......................

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6 H. t- ?+ \, f* j6 X. J. O6 E問題第二步
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5 m: ]# H; ?9 m4 f* rWeight 1:  1-6> 7-12. U1 q3 F6 q1 x, t) H
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) }2 c0 r& m! w+ D3 j! F你第三步点去搵 7-12 边一粒???
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========================================
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8 W4 v! ]. Y- V) a- L9 f問題第三步
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Weight 1:  1-6> 7-12* b, H5 P* h; |( q  u; w

5 r7 A) J7 d$ NWeight 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