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6 H/ i% \+ l; m

  Y: z/ B8 @; r* z& D) p『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)。
' r2 B/ I( ~, k' g8 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？』
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& U; F3 m2 |9 m: A: A, b  M注意: 8 R2 q9 F; [: y

- W( u* g* i, ?" I2 _" W( D; s1. 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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+ }$ \9 E$ n* L8 ?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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; d& l3 \, t( {( E: U6 ~# w& b[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:8 T6 g$ o- ?( E$ I) Z
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,
3 D; O$ y( V* J8 D! ^/ A等我搵下仲在吾在4 u7 n: Y7 T9 c! C2 w+ V

0 K# e6 y+ Q& m1 @! `# S當日用左37分鐘答１２粒波子，差７分鐘才合格。
7 v" p$ D4 E: J) T  z7 ]" O13.........+ k6 t- ]8 H6 W2 C9 T9 z
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:; k8 l0 T# t2 \
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我以前畫左個chart去答,6 f6 o; ?% _  a3 d: z
等我搵下...

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* R4 [) A9 T1 K# z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:' J: }6 s( J6 D7 |8 U. j
唔識隱藏...已經諗到..

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) ^: l) L8 A% [2 Y' d4 v/ X, Ksor !!!....e加改左! i' r6 M8 ]* s! {" }+ @: B& f  h# m3 I

+ i& K3 F- k- J6 D2. 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. ^5 o4 l) `! F* J2 B$ j
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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:
. k, E# U7 x( J6 G* k& e) x, O相信e條題目都有吾少人玩...

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7 {- B+ E& [9 v* A7 y5 BPlayPlay, Let me know later who has the right answer and I will add points accordingly.+ L( _) r7 K9 {1 r% f* e
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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2 u) X+ \' e" ?/ N) o* tPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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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
8 R: k+ O% S/ T1 L, mif 1-6 = 7-12     13 is fake: u  M. S+ M$ u1 k3 @- s8 c/ ]7 G, ]
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if not
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Weight the 2 time 7 C2 Q/ U* X6 B& g- ]( J4 b; p: F

! d4 L0 w1 @$ \3 HSuppose 1-6> 7-12
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1-3 vs 4-6
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# P% a2 U4 r) r6 _Then Weight the Third- D) j0 O/ [; L
3.
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Suppose 4-6 > 1-3" ^6 S1 z) H8 V' C- k% v" a) w$ g0 D

, v, G/ M+ p; C7 O& [Just like the first Step
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4 vs 5 ! ~6 L% _, a) Y7 p7 D$ }

. E5 s) S7 x( cif 4=5 6 is the fake one # s# M  v. o  K- T
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if 4>5  4 is the fake one
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" d$ n2 t: v8 i9 H# xand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4) N" r, U: T! t: h
Group B: 5,6,7,8! i) V( K1 a4 J1 K
Group C: 9,10,11,12% ]) L: x) A9 U+ `
Group D: 13+ u+ T0 b# c: U$ Y" o$ K* D' I

. Y* b; y% s* O& ?Round 1
- ~8 y" n2 }+ KGroup A vs Group B
2 j; J: N9 [8 E# p" s如A and B一樣, 即較輕一粒在Group C or D2 P5 x3 }5 X- X9 y
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Round 2
( Q- e& {9 j# p2 k再在Group C拆成:
- a5 z' y9 f$ Y; d7 a8 I# yGroup Ca: 9,10! Y7 \- ~4 x6 O3 E
Group Cb: 11,127 |6 K6 b* e& G5 a2 S' m
然後再秤, 如一樣, 即13為較輕一粒.
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4 @  C3 ~: ^) n. i# w3 m# D6 i* E如不同, 即較輕一組有一粒較輕波子在其中, 3 u- Z/ k# o) h3 d4 X% p/ G/ ]% t
要再秤, Round 3, 之後便知答案.: }1 ~9 b  z4 |3 s8 n

# }8 G& k- r- Q& V9 q: \) C/ o5 he.g. #1 假設10為較輕的一粒
( T: B/ H! E, [' `Round 1$ |. b& {9 ]! E) H" d4 o6 _# W
1,2,3,4 vs 5,6,7,8 = equal
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Round 2) t: T# ]( X9 G$ V! l% g9 g* {$ P
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
/ S5 O6 g  ^) Z' P$ A9 vs 10 = 9 > 10
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5 @0 G! ~. U/ YThe answer is 10.) W6 Q3 {/ k4 c/ X8 Q3 U

# r8 I/ C3 G$ z* i$ d$ Ee.g. #2 假設7為較輕的一粒% A) @1 [" t6 w1 K. m
Round 1
3 l- ]" D4 R- z6 N7 r  l1 E1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 20 l  l* g9 Q' Y, ^* w, }1 E9 i) L5 Q
5,6 vs 7,8 = 5,6 > 7,8! m4 h3 C, z! N1 G
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Round 3
6 o, ?9 C2 e! l/ Q7 vs 8 = 7 < 8
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4 o, x. x! [3 a, h, k  eThe answer is 7.
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/ {' n; C. p4 k" we.g. #3 假設13為較輕的一粒
& L+ a! |) G7 JRound 1  b: ?; |8 w! y+ j- q
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
+ s8 D4 G( a9 v+ B8 K  f9,10 vs 11,12 = equal6 t2 k* v# s. H$ U3 g+ y
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No Round 39 U% Q& Y+ p4 k/ L; p* L, g

2 q5 I5 `$ @4 o! i) GThe answer is 13.
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唔知我答得正唔正確呢?!
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" K, R, g$ h4 z4 z[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:& {, s  ^+ w3 S7 @% P- c) ~
1.
- g: f5 V" k& K6 ?5 ?/ [; Q) g0 Q1-6 vs 7-126 p, B* @: e5 f  V* R# b
if 1-6 = 7-12     13 is fake- S- q. P, H* {( E

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Weight the 2 time / V; G3 E& \4 c) n
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3' k6 g& ^! g# O5 `
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Just like the first Step3 U- `$ ~/ x, ]/ Y

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* b- Q; Q  k. _' h; ?& i' ?if 4=5 6 is the fake one
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3 I  j. y2 k$ mif 4>5  4 is the fake one
. s) [: K" i% ?9 P4 C2 `and so on......................

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問題第二步
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9 r% Y5 O; ~$ ?+ [8 ?9 ]# }+ ?+ b& ?' wWeight 1:  1-6> 7-12/ f) R/ y& Y) C% |' J* r* i

8 O; q& c7 s, I$ iWeight 2:  1-3 vs 4-6 , if 1-3 = 4-68 z6 P" r2 E! T" \3 _" L  x8 s
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你第三步点去搵 7-12 边一粒???
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問題第三步3 B% }* w3 u, P. X5 p0 d- Q
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Weight 1:  1-6> 7-12
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8 c: ~2 |& d/ x$ m- Q1 |6 c& TWeight 2:  4-6 > 1-3 ' j3 M3 o; l0 ?0 q7 N* q- H0 e: W
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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