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. ]/ i- }# q5 g/ e
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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)。3 M1 d- {$ j. F6 t# 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？』
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注意: 2 d. p" K5 o: w, ?/ d
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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7 z3 ?* C4 t: S7 m+ S! U1 E7 d
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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
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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:
7 I. X/ A$ e/ o5 ?3 P% b相信e條題目都有吾少人玩...

! F/ U9 f2 k5 T( e9 U* j8 U3 x! t我以前畫左個chart去答,# u* w2 @# _* s" c
等我搵下仲在吾在' L6 \5 p" x; ^

, ~- `- k  a; D: F/ }當日用左37分鐘答１２粒波子，差７分鐘才合格。
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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:
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' f- R" H$ w* a) W我以前畫左個chart去答,' }3 F4 @4 M* m! l) W. Z8 j
等我搵下...

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  i$ o/ r) }& K$ p. ]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:/ y: U1 W. ?: o0 G( P" y
唔識隱藏...已經諗到..

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sor !!!....e加改左. t# h- F. [% z  d( o) ]! v
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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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/ q3 n/ m8 u+ j, }( K! U' u[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
3 o! R/ Z0 x3 G0 [  t相信e條題目都有吾少人玩...

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& J* E2 ]7 E+ B+ ~9 aPlayPlay, Let me know later who has the right answer and I will add points accordingly.. W- v+ G9 `: ^6 G& Y8 C( f# ]
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:  x8 N  i- }- ?, q" E

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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8 A% M8 K3 t( U' I9 q# NThanks

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- x0 E  [8 y4 S% |不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.6 r* H# X5 Y5 |. N" p; m
1-6 vs 7-121 X: e* }! q" i) w& ?/ [6 {7 n) @
if 1-6 = 7-12     13 is fake3 }$ }+ J" z9 ~, \  i
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if not 1 y; O4 P$ i: K+ R

5 Z# i0 [$ I* D% tWeight the 2 time " n1 W- S2 I$ m& s; N/ c$ `+ p+ C
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Suppose 1-6> 7-12
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1-3 vs 4-6 8 N, T0 h2 t- J$ V

" v2 s$ V5 W: x$ |' F: BThen Weight the Third
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Suppose 4-6 > 1-3; ^) [$ o" {, V5 E; q& N
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Just like the first Step8 y4 Q' {) E% @

$ U( `7 f/ _; d! H4 vs 5 0 K# n5 @) e5 L2 t" Q' y1 D5 Q. g

: }" W  d1 N8 g: R  E3 R" Eif 4=5 6 is the fake one " \$ Y3 y2 w$ x, @# w9 s  L1 V
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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1 R) f: r& P2 u' z
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Group A: 1,2,3,4
/ I! m( J2 h8 n2 T0 pGroup B: 5,6,7,84 w8 m4 p! n6 O0 ?$ k% r
Group C: 9,10,11,125 o$ g$ a% S+ Q# B* T
Group D: 134 G8 w; p5 d- }% i0 d9 l3 M( _: g
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Round 1
, {2 J2 g5 _  S: x5 s8 GGroup A vs Group B5 j* x$ y" ]$ \5 O
如A and B一樣, 即較輕一粒在Group C or D( e5 y8 g  L" O8 E+ T$ [, P
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Round 2" S% J4 L: a8 O  B6 E& V  w, A
再在Group C拆成:
+ }/ {; d  k3 O1 Y9 ~: `1 c* q+ BGroup Ca: 9,108 t5 j6 s4 G5 s
Group Cb: 11,124 X* F5 \% ?6 @' \$ q! V& `1 ?% 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,
5 X' Y! C2 p; L要再秤, Round 3, 之後便知答案.( [% I6 s7 H! y  M

. b3 _6 \, O( m( Z" G% u: c8 B" ?" ie.g. #1 假設10為較輕的一粒5 b& j5 M- K" W6 k) m
Round 1% o* o! @. N0 {1 K& [. z; a* {
1,2,3,4 vs 5,6,7,8 = equal
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! K9 Z4 e: H0 H7 _& z9 D! ARound 2
3 W, {; ], u+ a- a- Y! z9,10 vs 11,12 = 9,10 < 11,12
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9 i1 Y: C5 H% e/ l8 P) CRound 3: h# Q! k; W7 n* x
9 vs 10 = 9 > 10" ~3 p0 |, I' T
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The answer is 10.; w2 ]1 O8 y  _7 l& j
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e.g. #2 假設7為較輕的一粒) m2 {$ N) h1 y5 `/ U
Round 10 n2 ]& {- R1 t  n: H
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8* k+ J+ e$ a; y3 x' j
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Round 2: X' S4 z8 a- u$ ]
5,6 vs 7,8 = 5,6 > 7,8# c1 V3 w- o* K4 R- t) Q/ ~( b/ o( g
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Round 3; o; v: {" l" H/ |& Q8 ~% z7 |
7 vs 8 = 7 < 8" X1 A7 C; w- R. ?9 j2 q2 B
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
! d( t& Q' \5 `1 z7 k& A6 ARound 1
1 Y/ a4 N3 h, I1,2,3,4 vs 5,6,7,8 = equal. a% E# ^) ^+ r' Y3 M
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Round 2
$ D7 q4 [/ c$ W2 L1 r9,10 vs 11,12 = equal2 n5 A% g& P  y2 p( {; i5 b
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No Round 3/ K+ p% h$ x% h# T3 Y9 r6 t5 ]
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The answer is 13.4 M2 S! Q: d9 C- u. q

& s4 N1 Q7 U9 e' @  t唔知我答得正唔正確呢?! / `! S& S4 g+ L2 \% O

, @+ y$ L: l8 s+ k& U$ R- G- a- d+ a[ 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
5 b  Z* z4 a3 P2 x* \" A$ q7 q0 Y$ zif 1-6 = 7-12     13 is fake
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. Z5 c+ G5 k: Oif not
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Weight the 2 time 6 w) ~2 \- ]/ X. J
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Suppose 1-6> 7-12# i, p( |( F2 T' F; d( X% V

) @! K6 s9 \* [; v. ]' y1-3 vs 4-6
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5 b8 J) W; Z& V& p& g& ?8 k0 t! D) |Then Weight the Third+ Q  v  C& t7 c- s5 g7 Z" \7 }( Z
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: m( Y. m: i8 c5 x# H4 ?Suppose 4-6 > 1-32 P( }* _) u* [2 g' T" p3 n

8 `1 l2 v8 t) t# }- o; sJust like the first Step
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7 W0 @+ X+ B4 n$ M2 H5 b4 vs 5
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- o2 i7 n! x& o2 o  mif 4=5 6 is the fake one ) B' [8 X1 a: v, V4 ^& p7 t" i
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if 4>5  4 is the fake one
! k. b; m8 [+ t/ s2 R; [% q" Iand so on......................

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: l6 x& _# v$ o) x9 d問題第二步
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) Z, [9 x( C/ ~- EWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6- E3 _# D0 G7 A% L( b; b+ l
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你第三步点去搵 7-12 边一粒???( k, N: F  m: Q: A' F4 }
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========================================8 D" q( T4 x  R
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問題第三步! U$ o# g8 j) Y3 Z/ S, i! E

: ], R, P& g+ G$ rWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 " A" T( F7 {7 ^% z& P, ~2 A

; {3 Q0 P" o* g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