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)。/ {/ t7 G" N' B- }5 ]
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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4 t+ F5 R$ k& j注意:
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% f# f* Z0 W0 s; v# t) g5 T7 ]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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1 j6 M1 i- \" O+ F1 F1 z: t2. 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& O( N" e1 H, Q& _- k5 k

1 H4 |& O1 J- V[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 ?( o- i) Z9 r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,
, ~) [# O' L4 y( N' ~; y等我搵下仲在吾在. j7 H: N  j3 l9 @) ~+ \, s
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
3 q0 W! a  _2 |2 {, g2 E13.........
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( {+ Q! k2 C9 S% 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:! q$ }# f6 F/ V( V" j6 p! j( `* A2 |

* W# x; X( A9 ^) [我以前畫左個chart去答,* J+ l+ Y/ D( `" [' n: b3 E: Z5 r3 B1 v. W
等我搵下...

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$ q, ?4 v6 J7 {, C5 z2 ]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:4 A9 {  k* G" c7 e7 P; M1 @
唔識隱藏...已經諗到..

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sor !!!....e加改左& t# t4 X! W0 o+ ^' y
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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:& \, W0 x! M& r9 ]
相信e條題目都有吾少人玩...

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- z2 B( n( p8 L( S5 d1 JPlayPlay, Let me know later who has the right answer and I will add points accordingly.7 t8 ?' k  W* D- z0 y( s* S0 g6 v' \
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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5 B  s' P$ W- p. tPlayPlay, Let me know later who has the right answer and I will add points accordingly.% v* n  o0 P0 C. r' H' F+ T& c- m
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Thanks

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. z' j8 O9 t% W: y  z( g7 Q% u不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
0 F0 d. C. {) `6 ~) Y: z1-6 vs 7-12
4 W8 a& R# \! V+ D- hif 1-6 = 7-12     13 is fake
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if not
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8 a6 k, X4 L+ GWeight the 2 time 9 F, Q* m' r% f

+ D- K, {' y# k+ p. _! \$ FSuppose 1-6> 7-12# b4 w2 R! Z$ l

9 h0 P$ }( a% f. s1-3 vs 4-6 % W- i2 W- G- e% M

2 F3 X) f5 z1 W/ d3 UThen Weight the Third
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) C# x. ?5 Y" w6 N8 W: O( Z/ D7 pSuppose 4-6 > 1-3
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' a5 [; `0 }/ n7 a, m$ B& fJust like the first Step' T. @1 M" S* R% B

0 Q3 W! ]- V) U( {+ X" `+ j4 vs 5 6 z. z) p& O* ~
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if 4=5 6 is the fake one
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, k- ^& a* c1 {# g! }if 4>5  4 is the fake one : ^' y1 A! a3 M0 L0 f' [  I
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and so on......................

hello1997

分3組4隻波子秤) n  A0 H! g# b

1 D! s1 t+ O+ H" x, yGroup A: 1,2,3,4
' J; a7 p! X; J3 z8 ~; j1 OGroup B: 5,6,7,86 w* s" h, S9 P: R# n
Group C: 9,10,11,12
" L) F' O! V0 r& C) a: m% IGroup D: 13
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! d* Q( D9 ?( X, URound 1+ U0 ?$ M+ l4 D7 a* d
Group A vs Group B( X4 f& Q2 q8 B# C& ~7 A7 x' c* O
如A and B一樣, 即較輕一粒在Group C or D
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) v, J1 J. [$ Y7 C$ kRound 2
& o, d4 h" S6 D, a, }* _1 }再在Group C拆成:; ?" n- B- m6 x1 f6 z, \
Group Ca: 9,10
0 ]9 ~+ R' F) k4 a' K1 Z; lGroup Cb: 11,12
) G% @  ~2 G+ v: m  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, ! c6 O  Z. N8 z7 y: }
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒1 v2 ~8 ^# s) t7 _
Round 1. R0 g- T# M; A. ]% G; X+ S
1,2,3,4 vs 5,6,7,8 = equal
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Round 26 a. O3 o7 d' k: b
9,10 vs 11,12 = 9,10 < 11,124 `4 |4 O2 C  Y) p) H1 E, t! a
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Round 3
, |& g3 b$ S; [' L; k9 vs 10 = 9 > 109 }" ^+ s( G. r9 d6 n3 z; K; l
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The answer is 10.
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( C3 c$ z% @5 Ke.g. #2 假設7為較輕的一粒+ T/ b& \) `+ S) q8 Z# I
Round 1! Y' t8 I( u8 a) F/ H0 S6 O
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,83 \) q/ H( T0 Q- E- N

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5,6 vs 7,8 = 5,6 > 7,8
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1 v2 K( r8 N8 {  E9 ^. [2 `Round 3
" I# g6 m5 M1 v7 vs 8 = 7 < 8% r4 F6 Q1 S* E4 d
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The answer is 7.
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: p& G6 U3 R: N! P0 j0 Je.g. #3 假設13為較輕的一粒
& e; e+ p1 X' ZRound 1) Q- W$ \" r8 r1 c8 D2 Y
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
- r7 D: G! v& ?% H8 P6 \% g0 Y0 m, C- J9,10 vs 11,12 = equal- V" Z$ C  Z" A' D: j6 |

. L4 P5 e8 D8 v) X8 d5 r$ gNo Round 39 z6 J6 u# R% f$ S/ [

7 s  m. Z3 [% tThe answer is 13.5 t( I7 P; l* J& ^

5 S4 d$ C$ V$ m$ w1 B9 [+ }4 L( Y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:6 }6 W6 C8 Q2 |8 B0 z, f8 q- U
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1-6 vs 7-12
4 b6 f+ `6 e6 N; Oif 1-6 = 7-12     13 is fake, I2 m4 `& s+ O! s% Z4 {

$ y+ u% X# E2 t- K% p/ Oif not
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: z7 A& h/ n" `9 j" N$ QWeight the 2 time 8 m3 [/ [% f& v4 t: s4 m" n4 v. W. p

# N) R; L& y3 R1 h+ o$ ?$ R7 o1 J% uSuppose 1-6> 7-125 v- P' P! C+ s4 F1 s
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1-3 vs 4-6 0 v: w  [. j! `8 E3 w/ K" E; x0 N
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Then Weight the Third  b! J3 s2 Q5 Y$ w2 Q
3.
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Suppose 4-6 > 1-3
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8 D8 l& r/ c! d& S5 @Just like the first Step
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4 vs 5 3 T; t: R+ k9 L0 v: U7 l1 h8 X

. F1 k( W: e: G) Uif 4=5 6 is the fake one
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if 4>5  4 is the fake one 0 D( v* v  H; r! m  z
and so on......................

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問題第二步6 P' C9 ~/ g) h, v/ B# M# G0 Q
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Weight 1:  1-6> 7-12
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' q- A$ @) C  b4 o" jWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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* K4 U7 l' q6 g' Z你第三步点去搵 7-12 边一粒???+ F, x, }* \* T2 K

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問題第三步
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! T! R3 v0 w' e' u; p6 T# ?- UWeight 1:  1-6> 7-12
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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