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+ z% Y& m% j2 v9 f, ^$ F- }

# o  X' w+ c5 S5 J( M& Z5 P, w『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)。/ v" Z3 x6 R) N% S0 o. b2 {1 R
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？』4 ^* q1 H* t" ]  l8 B" [$ C
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注意:
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. R' j& z: M* `4 o- O1 n" Y* f1. 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9 H+ e, `  x" Z: r- Q

% Z% V9 h7 u0 l. `7 T[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:0 M/ O" J1 [! j" `1 _
相信e條題目都有吾少人玩...

# T4 o  {/ A: l3 f/ E3 Q: M) I我以前畫左個chart去答,
9 x: u! A6 ]" p( B! g等我搵下仲在吾在
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9 p. r3 _: s- k5 J當日用左37分鐘答１２粒波子，差７分鐘才合格。; U% Z' v" \- h- i5 l. p; h) J" v
13.........
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; _/ ?5 N7 i  Y6 E  a[ 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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7 b' n$ @& B$ t8 @7 q* E$ i4 k我以前畫左個chart去答,; I2 ?+ q! |. ^( \2 c8 @) n
等我搵下...

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. M3 r2 `8 Q+ I+ l' i. m* e9 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 ^5 q0 x+ [: R) Z' x# H( j! z% S7 c唔識隱藏...已經諗到..

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sor !!!....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8 Q( S7 Q& Y2 c0 U3 e+ a- {3 f
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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:" @  e' P4 L* E* F$ ?. |% t
相信e條題目都有吾少人玩...

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6 {" c) C+ M+ b5 K) q: PPlayPlay, Let me know later who has the right answer and I will add points accordingly.5 @8 x$ @' l& ]. P, W% A' w9 G

# D1 V% V. I1 {# Q# y! `Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:$ ?/ ~2 P) p! X* l6 a

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.+ j4 S3 c$ m# c

4 m! N2 ^6 T& x' ]8 R9 F& M! {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

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1-6 vs 7-12
) G2 \, x, B5 `2 D4 Jif 1-6 = 7-12     13 is fake
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if not 6 g+ D( T4 u, Y1 h
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Weight the 2 time # }+ W- {  f/ \# x

- Z2 N+ l7 b. K3 t5 mSuppose 1-6> 7-12& U' b' Y3 E3 b/ t% I$ G
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1-3 vs 4-6 5 A$ Z- s# S) _

) B  K( ~$ p7 W* pThen Weight the Third5 g: p0 P) ]- f% e9 q. |: Z9 U5 t
3.
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Suppose 4-6 > 1-3
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0 Z- W9 i5 W# j3 N1 V0 QJust like the first Step
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4 vs 5 ) `/ ^$ i0 r- T5 p
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one * J; Z% l& \4 X, n/ I: \% p4 }

2 y/ g: i! h, w( z# Y2 g. Yand so on......................

hello1997

分3組4隻波子秤
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6 ]( Y, o, I; V) S0 ~) \6 R( |Group A: 1,2,3,4' M" R) f9 f( ~! c1 Q
Group B: 5,6,7,8
' a5 L0 h- m- `& t3 U. g& ?Group C: 9,10,11,12' `/ x' N2 F4 w7 N' Z2 F! u2 L
Group D: 13
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$ f) `4 W) m  H5 W! @3 O1 kRound 1
2 M+ p) t" m, R3 u( _* hGroup A vs Group B
: @: z- A2 c% {% S+ l如A and B一樣, 即較輕一粒在Group C or D
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Round 2! @( y, ^" W' `  L4 p' r
再在Group C拆成:
7 N1 X/ ?/ X" `% ]9 Z+ Y2 fGroup Ca: 9,10, r6 v2 `" \% V* p6 A& E9 ?
Group Cb: 11,12
. V+ N8 _% F+ s, |9 z1 W2 d' W# R然後再秤, 如一樣, 即13為較輕一粒.; ]+ Q  ^6 z- ^3 ^
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如不同, 即較輕一組有一粒較輕波子在其中,
* }  w8 i/ v0 x$ i# E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5 C: u6 [& _% [! K
Round 1& \- h/ o; V5 u) f+ u: X! z: w$ @) B
1,2,3,4 vs 5,6,7,8 = equal* M7 W- x; B" {! V

, |$ L* e  W, ?2 m/ M' ARound 2$ Z( f: b  {' ?, A5 x
9,10 vs 11,12 = 9,10 < 11,12
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Round 3+ D1 M6 b- [3 C3 b' X5 Z- Z
9 vs 10 = 9 > 10
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The answer is 10.
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  `6 {2 x, y& e! oe.g. #2 假設7為較輕的一粒
6 M' [% \2 @% p6 m; gRound 1
+ W1 O1 `* `5 Z3 c3 h, e3 G1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2: h( v7 E, z4 b" r( w. o
5,6 vs 7,8 = 5,6 > 7,8
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2 G& _1 l# j' jRound 3, k' g: P( K" Z- u8 m/ D  l
7 vs 8 = 7 < 8
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The answer is 7.  g' |% Y( ^8 R$ O* n0 p% {; m

3 i/ |& N5 W! ~, E& J' G$ Q8 ^# Ke.g. #3 假設13為較輕的一粒
8 `* j" J: I9 CRound 1- D0 j8 a* p0 Q# p
1,2,3,4 vs 5,6,7,8 = equal8 `) l1 k% T0 j( t5 J1 R' y

; ^5 B+ c) g" O& q( m/ u( YRound 2
& v2 c* R& K6 @% A5 ?6 O" T" o- F# L9,10 vs 11,12 = equal
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No Round 3
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The answer is 13.
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# z( \& E2 ~$ t% ]9 ]( 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:
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, B( Q8 ^5 h0 C: y6 ^3 G" i8 k* |1-6 vs 7-12$ A$ {) O' {) L/ r1 A, x& ]
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time ! o/ @/ ?8 r% @+ Q5 G
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Suppose 1-6> 7-12
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1-3 vs 4-6 6 C5 \/ a4 O2 q- E+ v& K
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Then Weight the Third
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4 O3 C6 h  I0 R$ i2 W7 V" _Suppose 4-6 > 1-3
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Just like the first Step; a$ @4 T' N0 y6 r: A4 N1 F, ]
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4 vs 5 : z3 F; O4 l. a0 J

' K6 N0 ]9 g5 j$ ~1 ]if 4=5 6 is the fake one
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# x$ W# A1 Q" ]- T/ lif 4>5  4 is the fake one
8 V% I( Q3 j1 [# j) r4 b! n% land so on......................

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# }! Z! ^7 i# d/ ~4 X問題第二步9 p, Y5 g; z" d/ R* ?

8 R5 H4 P/ @' R6 F6 v: Z8 AWeight 1:  1-6> 7-12# D( }3 O: s) a4 ]- @
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) q; }# L: l$ V你第三步点去搵 7-12 边一粒???4 F- [& Z2 d$ T3 r

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問題第三步
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Weight 1:  1-6> 7-12' F# ~* F! l* b# p

+ ~7 k4 v# \( T: }9 L% [Weight 2:  4-6 > 1-3
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# v! S7 ?4 w- t: [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