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)。
$ d+ h- ]9 e- P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: . ]# e; a. @4 |9 ?9 S& b9 l( S) G

6 b2 Z2 F: S; e: @* i$ ~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- s+ j3 o9 k3 o
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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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" T! d1 J- D1 S, v7 x4 Q  W; O9 p[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
- T9 O5 H' n' `9 h/ Y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,2 w  t; W% D, Y- Z2 [5 }$ M' L' O
等我搵下仲在吾在
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3 Z1 K7 A  O) d& b8 T當日用左37分鐘答１２粒波子，差７分鐘才合格。
% |5 p5 V$ F; u3 I13.........- Z1 r; a# f* J- a$ u9 f9 j

5 p1 @* w0 ~: c" n6 o; A/ B[ 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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( ~3 Q9 [1 U4 e( r9 ^我以前畫左個chart去答,
, Q9 f: \0 E5 f/ h等我搵下...

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% J+ r, ?1 l, O  O! ^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:
5 r1 p8 ~; e: ~, q3 x5 z/ `) [唔識隱藏...已經諗到..

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sor !!!....e加改左4 d+ {% @7 c  W, m1 P' R5 _
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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: H5 t; W0 t+ G! Y

# v8 f0 B$ v: E1 a8 l8 \[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:0 u0 L9 O0 L; {( N/ U- y4 a
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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0 b" h- ~2 y- N, C3 }0 |Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:% y. k7 f- E5 J$ h. F3 Q4 W

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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( i% h! c% ~( ]& z/ Z3 B. dThanks

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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

1.
) _# N) ~  y' z1-6 vs 7-12
( f( @" A* z& y% [6 rif 1-6 = 7-12     13 is fake8 ]( h0 f  g+ B- E; c
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if not % @% M; L% |- F, i- F* }- u

7 j# I7 h; u; {9 X7 f/ C$ K' TWeight the 2 time / l8 S) g. g  M( |5 Q
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Suppose 1-6> 7-12
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1-3 vs 4-6
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: G6 o: o$ e. `0 M7 I' yThen Weight the Third
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Suppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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/ u. Y  \" g! ]2 M7 Vif 4=5 6 is the fake one 6 u5 L: X3 \; y8 f* O' X+ O
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if 4>5  4 is the fake one 5 W: w% n# L5 v6 ~( `$ _
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and so on......................

hello1997

分3組4隻波子秤5 ~8 O7 j2 }8 U9 n9 p

* ^! \/ Y7 t' a. Q+ RGroup A: 1,2,3,4/ b* F2 K1 m: x" l9 x
Group B: 5,6,7,8
% T- C$ g; H: z5 sGroup C: 9,10,11,126 t- s. P! L' ?8 x
Group D: 135 S# Q6 r8 _9 b0 ?5 g8 W  C. T2 A

2 x  r( E8 Q8 B8 R3 U* ARound 1
+ Y2 F* R0 G3 G( m# qGroup A vs Group B7 t0 y! v0 D& n) R$ o1 b9 w( J! B
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
: s1 I) c& Q/ H8 W1 ]3 ~7 ~" |再在Group C拆成:
  u  R# u) H& P; uGroup Ca: 9,10
- n6 i0 t0 l$ M$ T: i# ]& N% A5 R+ j( ?( _Group Cb: 11,12
7 W& r! ~( ^/ C) j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, 2 i" N# I9 S8 q* r5 M
要再秤, Round 3, 之後便知答案." d% i3 e+ ]: w7 W/ @# j

- R) W& d3 P. ?# Z: Ee.g. #1 假設10為較輕的一粒/ _8 \1 h( a, y: T* M% P/ C8 G
Round 1
# R: O7 N5 b& y) G9 C6 ?# C# ?/ M1,2,3,4 vs 5,6,7,8 = equal* l/ Z% n1 _) T. f3 ~

! u8 ]- X0 g+ C/ Y. ^3 p9 IRound 26 O$ H% c1 K  o! \
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
5 B5 ~0 ^" e# Z9 vs 10 = 9 > 10# [2 K* T: t2 K2 Q3 p4 j% m
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The answer is 10.1 j2 z/ ^% {' O2 y- J: K

8 F6 f# N) ?+ T' B$ A1 ]3 c9 |e.g. #2 假設7為較輕的一粒
: k7 Z, h: R( P2 ]8 U& z1 CRound 12 ^; y. B- W, f, y+ Y8 I  k* V, f
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
5 N, m# u5 K) Q' g- G! A$ s2 }5,6 vs 7,8 = 5,6 > 7,8  y* c, Z7 F8 d9 K
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Round 3
. M5 c7 |) O! g! l; U: a7 vs 8 = 7 < 8
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The answer is 7.
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) Q- ]- j2 d# Z* [$ s2 Ye.g. #3 假設13為較輕的一粒2 o* I; N3 v' S
Round 19 V& w1 `/ `: }: P! P$ y, d
1,2,3,4 vs 5,6,7,8 = equal
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9 ^  A5 ^9 t1 V9 b; k  ZRound 2
/ A# }) Y  t  I8 X4 E9,10 vs 11,12 = equal% C& K6 P& r9 h8 U
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No Round 3! U  V0 ?4 x2 H: j
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The answer is 13.
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唔知我答得正唔正確呢?! - T, X5 `7 h$ F: D
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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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1-6 vs 7-12$ c" Q8 |# P$ N$ @
if 1-6 = 7-12     13 is fake% I' M) Q$ ^+ ^% m' }

6 L! W6 g: g# p6 I1 uif not
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" K7 r7 K2 @% A" l: R: RWeight the 2 time 3 ]7 p' m/ P0 C6 G* H
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Suppose 1-6> 7-12+ f4 n6 ~. j3 m2 o4 r

7 a' S9 P$ h1 {7 r6 N- g1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3& V9 N8 y4 ~( z) w6 |) n

0 F( U3 i! c2 \& q3 EJust like the first Step( o1 D& B, `9 a! R) @' [: l% v

2 w' z0 R7 O4 d- [! }' B" w7 O4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
) R4 n. B+ P% i0 n/ ~# Aand so on......................

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4 e+ Z3 h' |$ \& {問題第二步
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0 h5 C9 n  B1 F% _2 F! j( Z) \Weight 1:  1-6> 7-127 m( D( j$ |- t5 X3 B; b7 {- @+ g

3 I- ~5 K" X4 _& @) \8 `Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???
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$ Z$ v" q! d' Q# i1 o! N- x2 O========================================5 X0 O7 z6 s( u; m3 a( r9 R1 Q
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問題第三步8 t6 I! l" j  d8 m" |. c
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Weight 1:  1-6> 7-12( o, X- b( a% k
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Weight 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