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)。# U- a) _' N# B! Z# G" \& \
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？』+ m/ l8 H0 \( R

) t6 A+ \" W% V8 L注意: / _1 W; ]8 e' U; D& e3 Z2 g2 |

$ Z; N* I/ h/ a8 ^% n: O; P. U1. 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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* W6 }6 h; I4 z2. 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: E0 z6 Z5 u- o

; `3 O, Y1 g8 e: h" Y[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
7 Y6 \- O" R& m" g4 i4 \8 _6 J9 r' D$ O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,
1 v# ?8 a8 t' ]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。: q# h+ i2 l0 l: \' y$ ~
13.........$ w2 @# Q# Y8 J2 O# L4 {3 Y6 S! D

" U! @: N8 `: Q, z" _: U[ 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,
6 I0 z4 S) l* W$ y# _# m/ T6 M1 N1 C等我搵下...

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. j  k( ?( t. P: P+ F9 I4 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:
: n* K( k8 x9 k6 |$ n. P) I8 |唔識隱藏...已經諗到..

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sor !!!....e加改左
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* c( z  m/ O7 i8 O2. 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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" \# x1 A2 k/ }" p. e0 C* l/ i[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
( e1 A) @/ \: }0 t# ^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:6 U/ v+ M4 o+ I& t

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% K. q" Q$ H) PPlayPlay, Let me know later who has the right answer and I will add points accordingly.( H/ y& U+ o! a  q

% ~  z4 v/ f6 I- d3 @& QThanks

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+ S/ F$ R2 ]% X, y* M# B4 F% B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
, G, v. f; m5 Y9 m) V7 Cif 1-6 = 7-12     13 is fake9 o& b" n" s  X6 m* u/ B+ {

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Weight the 2 time
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" y0 A# I& j4 oSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third5 ]  c& n5 O* U
3.
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0 r; c( P1 F& g$ x, LSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5 2 N! w$ X' g* t9 y

- }( G7 D# r9 N5 F6 e; @. E3 Vif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤0 }5 r& z: Y  i0 Q( F
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Group A: 1,2,3,4) Z  |6 u# G/ O! M3 u
Group B: 5,6,7,8
( G% R5 q% y/ u# N) _) F- EGroup C: 9,10,11,12% h# D9 J; T8 Q& ?6 S
Group D: 13& z8 C2 k1 ~7 y" ]  j1 V6 o
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Round 1
; I  u: k2 w: b. y' YGroup A vs Group B
- [+ Y& [; ^3 n如A and B一樣, 即較輕一粒在Group C or D9 k6 [% V' h; l, Y, z8 s$ R& k

6 j3 j( j6 X" @9 o( m- q2 m' RRound 2; V2 z6 ?( q' a* t  Q9 l$ p
再在Group C拆成:
+ e2 B- h# I. k7 f5 nGroup Ca: 9,10/ E# \. Y6 t. B8 v% ]. k
Group Cb: 11,123 W0 w* K. F* Y( h4 _: |
然後再秤, 如一樣, 即13為較輕一粒.
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# _5 T2 j7 ^9 f0 k' c: B. r如不同, 即較輕一組有一粒較輕波子在其中, ( u) E2 L' N/ _, g
要再秤, Round 3, 之後便知答案.1 w* q( R* i5 G! K' m+ X

& A% \4 ?& I7 {. N7 b# d: ^e.g. #1 假設10為較輕的一粒  F) T1 @. B- e8 Q1 ]
Round 10 p# [( ~( b8 K# W& k- x) t( g4 y
1,2,3,4 vs 5,6,7,8 = equal
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Round 2; G; H0 \: u6 Q0 h# [
9,10 vs 11,12 = 9,10 < 11,124 ]& i$ V4 v. V$ A& n% {

, E  s! q) l, q1 K2 h$ `3 n5 E1 PRound 32 I, M9 r* ]( [
9 vs 10 = 9 > 10) x/ K5 [& ~2 T5 p* g

, q: m' _' `$ e0 uThe answer is 10.
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e.g. #2 假設7為較輕的一粒
( @# b2 ^2 H. g6 a1 @! ]Round 1
5 m$ T2 ]+ H3 h2 Z! k1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2" u3 l# U/ O- D' s1 m3 `7 B& }
5,6 vs 7,8 = 5,6 > 7,8
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2 Q) D4 I5 X/ B3 Q8 t; F; w6 i9 i2 ?Round 3( t0 _  s$ o' r3 F
7 vs 8 = 7 < 8
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The answer is 7.( Q1 ^3 u  \6 n$ k% m5 Y

6 @0 l2 [9 i, q5 B' {9 H8 Ze.g. #3 假設13為較輕的一粒
, W$ P5 k7 Q: J/ X( Q/ o& qRound 1
  i& {% u% h# \2 r# f5 [. l1,2,3,4 vs 5,6,7,8 = equal
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, V' j' j$ L( p6 w7 Q4 {Round 2
. j/ }# Q' K. \& A2 v' e9,10 vs 11,12 = equal
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No Round 3: p& D/ x: D9 Q6 x8 b* h

' V' R! p$ C' V* N9 xThe answer is 13.+ R3 ~- Z6 C1 o4 I0 `1 ]5 X- V. ?( e
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唔知我答得正唔正確呢?!
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% C$ L( [/ V5 I5 Q[ 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/ b' m$ O3 k  T( Y
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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: S1 c% s' ?, `5 A5 E; M1 xSuppose 1-6> 7-12. R6 @- r' H! n7 ]7 u/ d
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1-3 vs 4-6
: e( m( ~" H$ d' L* q9 }6 a1 A- U  s, i8 ?2 {
Then Weight the Third
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" F: H5 u/ R7 {0 S# }3 |! x4 i
8 X2 C6 z  W6 ]* S* a% XSuppose 4-6 > 1-3$ }- l. b. ~5 z( c0 @
# {2 M  F8 _& }" E
Just like the first Step
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4 vs 5
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. s+ K! n) b0 h" o1 xif 4=5 6 is the fake one
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! u) E/ ?' I' R3 Y5 Iif 4>5  4 is the fake one ' D& z0 D' M: G
and so on......................

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3 C3 \0 e/ W; `問題第二步
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Weight 1:  1-6> 7-12+ E  l9 b" q* k: p5 l

: i$ x/ {+ x* R% hWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6" S3 E) D) Q7 X9 [) ]% U" h" s

: k7 T1 E% z" N你第三步点去搵 7-12 边一粒???
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問題第三步
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, ^/ M+ ?* Q7 |4 a$ y2 Y7 @: O  nWeight 1:  1-6> 7-12" z( j% a% ^: P5 m
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Weight 2:  4-6 > 1-3 2 k/ }- {. D/ P4 ^" m

3 X, ^: w! w) {1 k2 u  n6 e7 x5 d9 r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