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1 e3 M. f. L  e  f, K( M
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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)。
. q/ c7 q+ }2 P# R# w( n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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注意: ) G" s* E+ Y& v1 A4 {7 @8 K
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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+ a5 c. L$ C# s6 k/ n

! i; v" L  }! q! B* ]# f7 ?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
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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 21:34:5 ]4 F' O- n2 Q7 E1 A. ?2 D( J7 R
相信e條題目都有吾少人玩...

# c5 ]! J! z+ L) ~9 |' T" e0 I# O我以前畫左個chart去答,( n5 n3 [9 b4 w
等我搵下仲在吾在
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2 u9 d' e9 I/ G/ b當日用左37分鐘答１２粒波子，差７分鐘才合格。
8 `: M9 l, Y9 f: L& \' E/ B/ M13.........
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* I, ~" F5 j( y" {9 E% z* Q6 r8 D. |[ 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,
) \& _; k, u- F3 R; [( j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:
3 j# f, j4 P  q" K唔識隱藏...已經諗到..

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  l" G0 `/ T9 Q6 B# v+ dsor !!!....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 D4 o4 D" m$ ~$ _- {
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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:
! Z4 y" s- t1 h/ |0 x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.$ p: r6 A- n1 d9 p! v
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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." N, o; y. \+ E2 k# {. q# R3 V

/ j, A4 R5 Y- Y0 c8 d( X; e7 WThanks

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% w0 E5 z, G+ P4 F- k5 }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 7-125 O5 d9 q- P6 O
if 1-6 = 7-12     13 is fake- N0 v% F- p" w8 h) [: B/ ]6 U- J4 @

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" z8 v5 O1 q# A5 i7 G* g6 p- rWeight the 2 time
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: a  @5 ~6 d' Y' g* ySuppose 1-6> 7-12
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1-3 vs 4-6 ! K7 _" y/ v/ O. i$ w9 Q8 l
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Then Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step: J5 w5 \# y9 |8 Q+ `
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4 vs 5 5 W  F3 {4 z1 m: t1 {

, w1 \; g' u# ^; qif 4=5 6 is the fake one
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; d+ |8 W: R. g& j$ wif 4>5  4 is the fake one ! l9 |+ q/ o7 `* P5 U

) v* S; m/ p6 v- E# Uand so on......................

hello1997

分3組4隻波子秤
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) {- G; m# ?9 w5 M( X0 K; ]1 NGroup A: 1,2,3,4
% G' T  S, v! r6 D! c( jGroup B: 5,6,7,85 ^* P" P3 ~3 n! j  M
Group C: 9,10,11,12, [9 @7 }5 f% y: F+ g, t. k3 b
Group D: 13( v3 J2 v1 Z, w1 Q. k) m: e. Q' W  E* \( C% S
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Round 1
) n0 e4 B- i* OGroup A vs Group B
& J, ~, G  g3 e如A and B一樣, 即較輕一粒在Group C or D
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Round 2
/ \+ _: U7 {* a, j1 _再在Group C拆成:0 m3 U( Z: j9 K
Group Ca: 9,10
! l- y5 [5 f5 KGroup Cb: 11,12
8 h: q: |7 J9 V  Z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,
  x8 C; q! j' Y; n. _6 r( I0 J# h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! W- Q4 M+ x" ^
Round 1
! n5 p- A: s' f% C4 A; l1,2,3,4 vs 5,6,7,8 = equal) X5 E5 Y4 F" b, V6 v+ u9 F
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Round 2* i% {( k: s: F+ a: Y( |2 \( D
9,10 vs 11,12 = 9,10 < 11,12( T3 t% f" L- Q# c3 P
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Round 3
8 k. E. g' ~6 ~) K9 vs 10 = 9 > 100 U) y( Q4 U  _5 V% W* a. H
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The answer is 10.3 f( L3 A* X& P; D4 z& E
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e.g. #2 假設7為較輕的一粒8 d1 U& V0 n' `1 u% [3 k0 t
Round 1
4 s( t8 l4 M# C$ F9 c5 K+ Y1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8. Q( ?* o; K9 |" V1 j

4 m6 v! K. `! z1 A) p7 K' {' KRound 21 v5 V: |+ j5 s- b' E1 k/ x
5,6 vs 7,8 = 5,6 > 7,8' f2 B2 _" g& ]0 n$ X7 i* G! n, j

# L; Q0 E7 C( }% \, l8 MRound 3
: C) j! O. B5 c7 vs 8 = 7 < 8
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The answer is 7.5 l; k, k9 G6 z  ]4 o6 s  S

' L' m7 g4 ?9 A, C1 Ve.g. #3 假設13為較輕的一粒) `6 z$ r2 E0 _1 ]4 M
Round 1+ ~8 N+ v+ @. r7 N7 |+ m
1,2,3,4 vs 5,6,7,8 = equal7 k+ i7 @& U, `! R, {& }0 b9 o
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Round 2
7 l  G. t2 y) n1 g# \, Q9 C- c2 }, y; Q9,10 vs 11,12 = equal+ L/ i6 @) k) Y
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No Round 30 J, P3 T" ?( M! M2 s
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The answer is 13.  K- l6 n% o+ Z5 g2 c% D

3 d7 z8 G& I& P; Y唔知我答得正唔正確呢?! % y7 e3 C% K0 y6 z

$ e4 _; }9 K7 ]6 x8 P. J  Q' f[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:+ |4 v) _( ?  t5 t' e: I- X; _7 b
1.
. T9 R& B+ K  d* J$ ?6 L1-6 vs 7-12. O+ N% E: w" H8 B/ i5 l, ]* x. T
if 1-6 = 7-12     13 is fake" x; J1 N9 Z" c

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Weight the 2 time " O# R9 s3 j0 R

0 l+ L1 r+ q" [& x/ _+ nSuppose 1-6> 7-12! L' k5 V+ ~" v  k

6 s8 j4 X$ g4 C& B9 v1-3 vs 4-6 : E' T& y. ?- f" L9 n
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Then Weight the Third6 D9 o: b! t% J1 k) z
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& H. Q2 R( _* W" xSuppose 4-6 > 1-3
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% z  j% P8 k3 r2 m+ f4 _Just like the first Step
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4 vs 5 + k' u1 U! v4 w1 |! a: ~

; @" W0 C4 z6 t1 @7 g. Q. F; n  iif 4=5 6 is the fake one + M4 d0 U$ V) I0 I8 o) I1 t
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if 4>5  4 is the fake one
& C; J  F* G2 a8 M. [4 M0 ^% jand so on......................

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問題第二步7 q5 _! }& H' G6 f
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Weight 1:  1-6> 7-12
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4 c4 h1 j. A3 F3 c0 QWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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0 z0 F5 Z( V# Y8 n. u7 k" `你第三步点去搵 7-12 边一粒???
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$ n: P5 N0 Y+ h* i4 C; J8 m========================================6 L# j$ V  c2 t' D* S

& U! A: G  S' t1 c  R問題第三步
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$ Z$ }" u8 O1 j" sWeight 1:  1-6> 7-12: N8 d) n; z% d6 @- [

; Z- N: e8 ]. h2 qWeight 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